Lombardini LDW 502, LDW 903, LDW 602, LDW 1204, LDW 1204/T Workshop Manual

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cod. 1-5302-351

WORKSHOP MANUAL

FOCS Engine Series

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Manuale officina FOCS_cod. 1.5302.350_7° ed_ rev. 06

PREFACE

-Every attempt has been made to present within this service manual, accurate and up to date technical information. However, development on the LOMBARDINI series is continuous. Therefore, the information within this manual is subject to change without notice and without obligation.

-The information contained within this service manual is the sole property of LOMBARDINI. As such, no reproduction or replication in whole or part is allowed without the express written permission of LOMBARDINI.

Information presented within this manual assumes the following:

1- The person or people performing service work on LOMBARDINI series engines is properly trained and

equipped to safely and professionally perform the subject operation;

2- The person or people performing service work on LOMBARDINI series engines possesses adequate hand and

LOMBARDINI special tools to safely and professionally perform the subject service operation;

3- The person or people performing service work on LOMBARDINI series engines has read the pertinent

information regarding the subject service operations and fully understands the operation at hand.

- This manual was written by the manufacturer to provide technical and operating information to authorised

LOMBARDINI after-sales service centres to carry out assembly, disassembly, overhauling, replacement and

tuning operations.

- As well as employing good operating techniques and observing the right timing for operations, operators must read

the information very carefully and comply with it scrupulously.

- Time spent reading this information will help to prevent health and safety risks and financial damage.

Written information is accompanied by illustrations in order to facilitate your understanding of every step of the operating phases.

FOCS Engine Series

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

CUSE/ATLO

7° 04-906 15.03.20081-5302-351 50563

Drafting

body

Document

code

Edition Issue date

Review

date

Model

N°

Revision

REGISTRATION OF MODIFICATIONS TO THE DOCUMENT

Any modifications to this document must be registered by the drafting body, by completing the following table.

Endorsed

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

CHAPTER INDEX

1GENERAL REMARKS AND SAFETY INFORMATION................................................................ Pag. 9 - 11

GENERAL SAFETY DURING OPERATING PHASES .................................................................................................... 11

GENERAL SERVICE MANUAL NOTES ............................................................................................................................ 9

GLOSSARY AND TERMINOLOGY ................................................................................................................................... 9

SAFETY AND ENVIRONMENTAL IMPACT .................................................................................................................... 11

SAFETY AND WARNING DECALS ................................................................................................................................. 10

SAFETY REGULATIONS ........................................................................................................................................... 10-11

WARRANTY CERTIFICATE ............................................................................................................................................... 9

2TECHNICAL INFORMATION.................................................................................................................. 12-23

MANUFACTURER AND ENGINE IDENTIFICATION ................................................................................................ 14-15

OVERALL DIMENSION .............................................................................................................................................. 21-23

PERFORMANCE DIAGRAMS .................................................................................................................................... 18-20

TECHINICAL SPECIFICATIONS ............................................................................................................................... 16-17

TROUBLE SHOOTING ............................................................................................................................................... 12-13

3MAINTENANCE - RECOMMENDED OIL TYPE - REFILLING.............................................................. 24-27

ACEA Regualtions - ACEA Sequences ............................................................................................................................ 25

API / MIL Sequence .......................................................................................................................................................... 25

COOLANT .........................................................................................................................................................................27

FUEL SPECIFICATIONS .................................................................................................................................................. 27

International specifications............................................................................................................................................... 25

LUBRICANT ......................................................................................................................................................................25

PRESCRIBED LUBRICANT ............................................................................................................................................. 26

ROUTINE ENGINE MAINTENANCE ............................................................................................................................... 24

SAE Classification ........................................................................................................................................................... 25

4DISASSEMBLY / REASSEMBLY........................................................................................................... 28-65

Air filter support ................................................................................................................................................................ 30

Air restriction switch ......................................................................................................................................................... 29

Alternator/Cooling fan belt drive ....................................................................................................................................... 33

Big end bearing ................................................................................................................................................................. 58

Camshaft journals and housings - Dimensions ...............................................................................................................47

Camshaft lobe measurement ...........................................................................................................................................47

Camshaft timing - Belt Reassembly ................................................................................................................................ 37

Camshaft timing - Belt Tightening and Fastening ........................................................................................................... 38

Camshaft timing - Belt tightening tool ............................................................................................................................. 38

Camshaft timing pulley - Disassembly/Assembly ........................................................................................................... 37

Camshaft timing pulley - Reference marks ..................................................................................................................... 37

Camshaft, disassembly ....................................................................................................................................................46

Camshaft, journal and housing measurement ................................................................................................................46

Central main bearing caps ............................................................................................................................................... 60

Check the clearances between the bearings and the journal..........................................................................................60

Clearances between the bearings and corresponding pins ............................................................................................ 64

CONNECTING ROD ......................................................................................................................................................... 58

Connecting rod alignment ................................................................................................................................................ 59

Connecting rod with bearings and pin .............................................................................................................................58

Connecting tod, weight .....................................................................................................................................................58

Cooling fan ........................................................................................................................................................................ 33

Crankcase breather LDW 502 ..........................................................................................................................................44

Crankcase vacuum regulator valve .................................................................................................................................. 43

Crankshaft axial clearance ............................................................................................................................................... 61

Crankshaft front and back oil seal rings .......................................................................................................................... 62

This manual contains pertinent information regarding the repair of LOMBARDINI water-cooled, indirect injection Diesel engines type LDW 502-602-903-1204-1204/T e LDW 702-1003-1404: updated March 15

, 2006.

CHAPTER INDEX

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Crankshaft timing pulley ................................................................................................................................................... 36

Crankshaft, check journals and crank .............................................................................................................................. 63

Crankshaft, lubrication lines .............................................................................................................................................63

Cylinder head assembly ................................................................................................................................................... 57

Cylinder head tightening procedure LDW 1204-1204/T-1404 ........................................................................................ 57

Cylinder head tightening procedure LDW 502-602-702-903-1003 .................................................................................57

CYLINDER HEAD, removal .............................................................................................................................................. 48

Cylinder roughness ........................................................................................................................................................... 59

Cylinder, class ................................................................................................................................................................... 59

CYLINDERS ...................................................................................................................................................................... 59

Driving pulley .................................................................................................................................................................... 34

Dry type air filter ............................................................................................................................................................... 29

E.G.R. Circuit .............................................................................................................................................................. 30-31

Exhaust maniflod .............................................................................................................................................................. 32

Flywheel ............................................................................................................................................................................ 34

Fuel rail ............................................................................................................................................................................. 44

Fuel tank (optional) ...........................................................................................................................................................33

Governor springs .............................................................................................................................................................. 40

Governor springs for Gensets ..........................................................................................................................................40

Head gasket ...................................................................................................................................................................... 56

Hydraulic pump drive ........................................................................................................................................................65

Injection pump control rod ................................................................................................................................................ 44

Intake / Exhaust / Injection camshaft lobe height - LDW 903 ........................................................................................ 47

Intake manifold – Remote air filter ................................................................................................................................... 30

Journal and connecting rod pins diameters..................................................................................................................... 63

Main bearings and connecting rod big ends diameters ..................................................................................................64

Oil bath air cleaner ( on request ).................................................................................................................................... 29

Oil pan, removal ............................................................................................................................................................... 52

Oil pump - disassembly ....................................................................................................................................................42

Oil pump - Reassembly ....................................................................................................................................................42

PISTON .............................................................................................................................................................................52

Piston clearance ............................................................................................................................................................... 55

Piston coolant nozzles ......................................................................................................................................................61

Piston ring, Clearance between grooves .........................................................................................................................54

Piston ring, mounting order ..............................................................................................................................................55

Piston rings - End gaps ....................................................................................................................................................54

Piston, assembly ............................................................................................................................................................... 55

Piston, class ...................................................................................................................................................................... 53

Piston, disassembly and inspection.................................................................................................................................53

Piston, weight .................................................................................................................................................................... 54

Pre-combustion chamber .................................................................................................................................................51

Pre-combustion chamber ring nut removal ..................................................................................................................... 51

Pre-combustion chamber, installation .............................................................................................................................51

Pre-combustion chamber, removal ..................................................................................................................................51

Pump/injector unit - Disassembly .................................................................................................................................... 45

Pump/injector unit - non-return valve...............................................................................................................................45

Rear and forward main bearing caps ............................................................................................................................... 60

RECOMMENDATIONS FOR DISASSEMBLING AND ASSEMBLING ........................................................................... 28

RECOMMENDATIONS FOR OVERHAULS AND TUNING ............................................................................................ 28

Return pulley ..................................................................................................................................................................... 34

Ringfeder-type rings on LDW 1204-1204/T-1404 ........................................................................................................... 35

Ringfeder-type rings on LDW 1204-1204/T-1404 - Assembly ........................................................................................ 35

Rocker arm assembly .......................................................................................................................................................45

Rocker arm cover..............................................................................................................................................................42

Rocker arm cover gasket .................................................................................................................................................. 43

Rocker arm pivot, dismounting and remounting ............................................................................................................. 46

Shoulder half rings ............................................................................................................................................................ 61

Shoulder half rings, oversized elements .......................................................................................................................... 62

Speed governor ................................................................................................................................................................. 40

Speed governor - Limiting speed governor ...................................................................................................................... 41

Speed governor - Reassembly .........................................................................................................................................41

Speed governor components ...........................................................................................................................................40

Stop pin rings, dismounting and remounting...................................................................................................................52

Third drive, components ................................................................................................................................................... 65

Tightening pulley ............................................................................................................................................................... 36

Timing belt / Timing pulley arrangement ......................................................................................................................... 36

Timing belt cover ..............................................................................................................................................................35

Chapter index

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Timing belt removal ..........................................................................................................................................................36

Vacuum pump and vacuum pump flange ........................................................................................................................33

Valve / Rocker arm clearance .......................................................................................................................................... 44

Valve guide insertion ........................................................................................................................................................ 49

Valve guides and valve guide housings ........................................................................................................................... 49

Valve recess and seat sealing width ................................................................................................................................ 50

Valve seats and housings - Dimensions ..........................................................................................................................50

Valve springs.....................................................................................................................................................................48

Valve stem sealing rings - Reassembly ...........................................................................................................................48

Valve timing - Angles ........................................................................................................................................................39

Valve timing check ............................................................................................................................................................ 38

Valve, specifications ......................................................................................................................................................... 49

Valves ................................................................................................................................................................................ 48

5TURBOCHARGER................................................................................................................................. 66-67

TURBO CHARGER ........................................................................................................................................................... 66

Turbocharger components ...............................................................................................................................................66

Turbocharger pressure testing ......................................................................................................................................... 66

Turbocharger west gate adjustment - Regolazione corsa asta comando valvola " Waste gate ".................................67

6LUBRIFICATION CIRCUIT.................................................................................................................... 68-71

Internal oil filter and oil sump return pipe ........................................................................................................................ 69

LUBRIFICATION CIRCUIT ............................................................................................................................................... 68

Oil filter cartridge .............................................................................................................................................................. 70

Oil pressure check ............................................................................................................................................................70

Oil pressure regulating valve ............................................................................................................................................70

Oil pump ............................................................................................................................................................................ 69

Oil pump, clearance between rotors ................................................................................................................................ 69

7COOLANT CIRCUIT.............................................................................................................................. 72-73

COOLANT CIRCUIT .........................................................................................................................................................72

Coolant circulation pump, components ........................................................................................................................... 73

Radiator and compensation, check and seal tank cap. ..................................................................................................73

Thermostatic valve ............................................................................................................................................................ 73

8FUEL SYSTEM...................................................................................................................................... 74-83

Closing the oilhole ............................................................................................................................................................ 82

Fuel feeding / injection circuit ........................................................................................................................................... 74

Fuel filter detached from the tank (on request) ............................................................................................................... 74

Fuel lift pump .................................................................................................................................................................... 74

Fuel pump drive rod projection ........................................................................................................................................74

Injection advance control and regulation ......................................................................................................................... 80

Injection advance for currently used pump/injector unit ................................................................................................. 80

Injection advance references on timing belt protector .................................................................................................... 81

Injection pump assembly/disassembly ............................................................................................................................76

Injection pumps delivery balancing ..................................................................................................................................83

Injector, nozzle projection ................................................................................................................................................. 79

Injector, setting (old type) ................................................................................................................................................. 79

Injector, spark arrester ...................................................................................................................................................... 79

Instrument connection ...................................................................................................................................................... 83

Plunger barrel ring nut assembly/disassembly ................................................................................................................ 76

Plunger injection pump reassembly .................................................................................................................................76

Preliminary steps to pump/injector unit delivery balancing test ..................................................................................... 82

Pump/injector unit .............................................................................................................................................................75

Pump/injector unit se.no. 6590.285 control data. ..................................................................................................... 77-78

Pump/injector unit, components ...................................................................................................................................... 75

Pumping element ..............................................................................................................................................................77

Pumping element (old-type injection pump) ....................................................................................................................77

Chapter index

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Setting of injector according to current pump/injector unit ............................................................................................. 79

Static injection advance regulation .................................................................................................................................. 82

Static injection advance tuning ........................................................................................................................................81

TDC (Top Dead Center) references .................................................................................................................................81

Test head B assembly ...................................................................................................................................................... 82

Tester and special coupling for injection advance control (Old-type injection pump) ...................................................81

9ELECTRIC SYSTEM.............................................................................................................................. 84-93

Alternator battery charger curve 12V 20A ....................................................................................................................... 89

Alternator battery charger curve 12V 30A ....................................................................................................................... 89

Alternator, Iskra 14V 33A ................................................................................................................................................ 85

Alternator, Iskra 14V 33A - Performance Curve ............................................................................................................. 85

Alternator, Marelli type AA 125 R 14V 45A .....................................................................................................................87

Alternator, Marelli type AA 125 R 14V 45A - Performance Curve .................................................................................. 87

Coolant high temperature lamp sensor ............................................................................................................................ 93

ELECTRIC CONTROL PANEL WITH AUTOMATIC ENGINE STOP .............................................................................84

Electric starting layout (12V) with flywheel alternator .....................................................................................................90

Electric starting layout (12V) with Iskra alternator 14V 33A.......................................................................................... 86

Electric starting layout (12V) with Marelli type AA 125 R 14V 45A alternator ............................................................... 88

Flywheel Alternator ...........................................................................................................................................................88

Oil pressure switch ........................................................................................................................................................... 93

Pre-heating glow plug .......................................................................................................................................................92

Pre-heating glow plug control unit with coolant temperature sensor .............................................................................92

STARTER MOTOR - Bosch DW 12V 1,1 KW ................................................................................................................91

Starter motor, Bosch 12V 1,6 Kw .................................................................................................................................... 91

Starter motor, Bosch DW 12V 1,1 KW - Performance Curve........................................................................................ 91

Starter motor, Bosch DW 12V 1,6 KW - Performance Curve........................................................................................ 92

Temperature sensor for control unit ................................................................................................................................. 93

Voltage regulator connections ..........................................................................................................................................90

10 SETTINGS ............................................................................................................................................... 94-97

E.G.R. calibration ............................................................................................................................................................. 97

Injection pump flow limiter and standard engine torque gearing device ........................................................................ 95

Pump injection delivery standard setting without dynamometric brake ......................................................................... 94

Pump/injector unit delivery setting with braked engine ...................................................................................................96

Pump/injector unit timing with speed governor ...............................................................................................................95

Required settings (as most commonly applies) ..............................................................................................................96

Setting the idle maximum (standard) ............................................................................................................................... 94

Setting the idle minimum (standard) ................................................................................................................................ 94

Setting the stop ................................................................................................................................................................. 95

SPEED SETTINGS ........................................................................................................................................................... 94

11 STORAGE ............................................................................................................................................... 98-99

ENGINE STORAGE (NOT INSTALLED) .........................................................................................................................98

PREPARING THE ENGINE FOR OPERATION AFTER PROTECTIVE TREATMENT ................................................. 99

PROTECTIVE TREATMENT ............................................................................................................................................ 98

12 TORQUE SPECIFICATIONS AND USE OF SEALANT ........................................................... 100-101

Table of tightening torques for standard screws (coarse thread) ................................................................................. 101

Table of tightening torques for standard screws (fine thread) ...................................................................................... 101

Table of tightening torques for the main components ................................................................................................... 100

13 SPECIAL TOOLS ....................................................................................................................................... 102

Chapter index

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

-The products manufactured by Lombardini Srl are warranted to be free from conformity defects for a period of 24 months from the date of delivery to the first end user.

-For engines fitted to stationary equipment, working at constant load and at constant and/or slightly variable speed within the setting limits, the warranty covers a period up to a limit of 2000 working hours, if the above mentioned period (24 months) is not expired.

-If no hour-meter is fitted , 12 working hours per calendar day will be considered.

-For what concerns the parts subject to wear and deterioration (injection/feeding system, electrical system, cooling system, sealing parts, non-metallic pipes, belts) warranty covers a maximum limit of 2000 working hours, if the above mentioned period (24 months) is not expired.

-For correct maintenance and replacement of these parts, it is necessary to follow the instructions reported in the documentation supplied with each engine.

-To ensure the engine warranty is valid, the engine installation, considering the product technical features, must be carried out by qualified personnel only.

-The list of the Lombardini authorized dealers is reported in the “Service” booklet, supplied with each engine.

-Special applications involving considerable modifications to the cooling/lubricating system (for ex.: dry oil sump), filtering system, turbo-charged models, will require special written warranty agreements.

-Within the above stated periods Lombardini Srl directly or through its authorized network will repair and/or replace free of charge any own part or component that, upon examination by Lombardini or by an authorized Lombardini agent, is found to be defective in conformity, workmanship or materials.

-Any other responsibility/obligation for different expenses, damages and direct/indirect losses deriving from the engine use or from both the total or partial impossibility of use, is excluded.

-The repair or replacement of any component will not extend or renew the warranty period.

Lombardini warranty obligations here above described will be cancelled if:

-Lombardini engines are not correctly installed and as a consequence the correct functional parameters are not respected and altered.

-Lombardini engines are not used according to the instructions reported in the “Use and Maintenance” booklet supplied with each engine.

-Any seal affixed to the engine by Lombardini has been tampered with or removed.

-Spare parts used are not original Lombardini.

-Feeding and injection systems are damaged by unauthorized or poor quality fuel types.

-Electrical system failure is due to components, connected to this system, which are not supplied or installed by Lombardini.

-Engines have been disassembled, repaired or altered by any part other than an authorized Lombardini agent.

-Following expiration of the above stated warranty periods and working hours, Lombardini will have no further responsibility for warranty and will consider its here above mentioned obligations for warranty complete.

-Any warranty request related to a non-conformity of the product must be addressed to the Lombardini Srl service agents.

GENERAL SERVICE MANUAL NOTES

1 - Use only genuine Lombardini repair parts.

Failure to use genuine Lombardini parts could result in sub-standard performance and low longevity.

2- All data presented are in metric format. That is, dimensions are presented in millimeters (mm), torque is presented in

Newton-meters (Nm), weight is presented in kilograms (Kg), volume is presented in liters or cubic centimeters (cc) and pressure is presented in barometric units (bar).

GENERAL REMARKS AND SAFETY INFORMATION

WARRANTY CERTIFICATE

GLOSSARY AND TERMINOLOGY

For clarity, here are the definitions of a number of terms used recurrently in the manual.

-Cylinder number one: is the timing belt side piston .

-Rotation direction: anticlockwise «viewed from the flywheel side of the engine».

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

• LOMBARDINI Engines are built to supply their performances in a safe and long-lasting way.

To obtain these results, it is essential for users to comply with the servicing instructions given in the relative manual along with the safety recommendations listed below.

• The engine has been made according to a machine manufacturer's specifications and all actions required to meet the essential safety and health safeguarding requisites have been taken, as prescribed by the current laws in merit. All uses of the engine beyond those specifically established cannot therefore be considered as conforming to the use defined by LOMBARDINI which thus declines all liability for any accidents deriving from such operations.

• The following indications are dedicated to the user of the machine in order to reduce or eliminate risks concerning engine operation in particular, along with the relative routine maintenance work.

• The user must read these instructions carefully and become familiar with the operations described. Failure to do this could lead to serious danger for his personal safety and health and that of any persons who may be in the vicinity of the machine.

• The engine may only be used or assembled on a machine by technicians who are adequately trained about its operation and the deriving dangers. This condition is also essential when it comes to routine and, above all, extraordinary maintenance operations which, in the latter case, must only be carried out by persons specifically trained by LOMBARDINI and who work in compliance with the existing documentation.

• Variations to the functional parameters of the engine, adjustments to the fuel flow rate and rotation speed, removal of seals, demounting and refitting of parts not described in the operation and maintenance manual by unauthorized personnel shall relieve LOMBARDINI from all and every liability for deriving accidents or for failure to comply with the laws in merit.

• On starting, make sure that the engine is as horizontal as possible, unless the machine specifications differ. In the case of manual start-ups, make sure that the relative actions can take place without the risk of hitting walls or dangerous objects, also considering the movements made by the operator. Pull-starting with a free cord (thus excluding self-winding starting only), is not permitted even in an emergency.

• Make sure that the machine is stable to prevent the risk of overturning.

• Become familiar with how to adjust the rotation speed and stop the engine.

• Never start the engine in a closed place or where there is insufficient ventilation.

Combustion creates carbon monoxide, an odourless and highly poisonous gas. Lengthy stays in places where the engine freely exhausts this gas can lead to unconsciousness and death.

• The engine must not operate in places containing inflammable materials, in explosive atmospheres, where there is dust that can easily catch fire unles specific, adequate and clearly indicated precautions have been taken and have been certified for the machine.

• To prevent fire hazards, always keep the machine at least one meter from buildings or from other machinery.

• Children and animals must be kept at a due distance from operating machines in order to prevent hazards deriving from

their operation.

• Fuel is inflammable. The tank must only be filled when the engine is off. Thoroughly dry any spilt fuel and move the fuel container away along with any rags soaked in fuel or oil. Make sure that no soundproofing panels made of porous material are soaked in fuel or oil. Make sure that the ground or floor on which the machine is standing has not soaked up any fuel or oil.

• Fully tighten the tank plug each time after refuelling. Do not fill the tank right to the top but leave an adequate space for the fuel to expand.

• Fuel vapour is highly toxic. Only refuel outdoors or in a well ventilated place.

• Do not smoke or use naked flames when refuelling.

• The engine must be started in compliance with the specific instructions in the operation manual of the engine and/or

machine itself. Do not use auxiliary starting aids that were not installed on the original machine (e.g. Startpilot’).

• Before starting, remove any tools that were used to service the engine and/or machine. Make sure that all guards have been refitted.

General remarks and safety information

- Important remarks and features of the text are highlighted

using symbols, which are explained below:

Danger – Attention

This indicates situations of grave danger which, if ignored, may seriously threaten the health and safety of individuals.

SAFETY AND WARNING DECALS

Caution – Warning

This indicates that it is necessary to take proper precautions to prevent any risk to the health and safety of individuals and avoid financial damage.

Important

This indicates particularly important technical information that should not be ignored.

SAFETY REGULATIONS

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

• During operation, the surface of the engine can become dangerously hot. Avoid touching the exhaust system in particular.

• Before proceeding with any operation on the engine, stop it and allow it to cool. Never carry out any operation whilst the engine is running.

• The coolant fluid circuit is under pressure. Never carry out any inspections until the engine has cooled and even in this case, only open the radiator plug or expansion chamber with the utmost caution, wearing protective garments and goggles. If there is an electric fan, do not approach the engine whilst it is still hot as the fan could also start operating when the engine is at a standstill. Only clean the coolant system when the engine is at a standstill.

• When cleaning the oil-cooled air filter, make sure that the old oil is disposed of in the correct way in order to safeguard the environment. The spongy filtering material in oil-cooled air filters must not be soaked in oil. The reservoir of the separator pre-filter must not be filled with oil.

• The oil must be drained whilst the engine is hot (oil T ~ 80°C). Particular care is required to prevent burns. Do not allow the oil to come into contact with the skin.

• Pay attention to the temperature of the oil filter when the filter itself is replaced.

• Only check, top up and change the coolant fluid when the engine is off and cold.

Take care to prevent fluids containing nitrites from being mixed with others that do not contain these substances since "Nitrosamine", dangerous for the health, can form. The coolant fluid is polluting and must therefore be disposed of in the correct way to safeguard the environment.

• During operations that involve access to moving parts of the engine and/or removal of rotating guards, disconnect and insulate the positive wire of the battery to prevent accidental short-circuits and to stop the starter motor from being energized.

• Only check belt tension when the engine is off.

• Only use the eyebolts installed by LOMBARDINI to move the engine.

These lifting points are not suitable for the entire machine; in this case, the eyebolts installed by the manufacturer should be used.

General remarks and safety information

GENERAL SAFETY DURING OPERATING PHASES

–The procedures contained in this manual have been tested and selected by the manufacturer’s technical experts, and hence

are to be recognised as authorised operating methods.

–A number of procedures must be carried out with the aid of equipment and tools that simplify and improve the timing of

operations.

–All tools must be in good working condition so that engine components are not damaged and that operations are carried out

properly and safely. It is important to wear the personal safety devices prescribed by work safety laws and also by the standards of this manual.

–Holes must be lined up methodically and with the aid of suitable equipment. Do not use your fingers to carry out this operation

to avoid the risk of amputation.

–Some phases may require the assistance of more than one operator. If so, it is important to inform and train them regarding

the type of activity they will be performing in order to prevent risks to the health and safety of all persons involved. –Do not use flammable liquids (petrol, diesel, etc.) to degrease or wash components. Use special products. –Use the oils and greases recommended by the manufacturer.

Do not mix different brands or combine oils with different characteristics. –Discontinue use of the engine if any irregularities arise, particularly in the case of unusual vibrations. –Do not tamper with any devices to alter the level of performance guaranteed by the manufacturer.

SAFETY AND ENVIRONMENTAL IMPACT

Every organisation has a duty to implement procedures to identify, assess and monitor the influence of its own activities (products, services, etc.) on the environment. Procedures for identifying the extent of the impact on the environment must consider the following factors:

- Liquid waste

- Waste management

- Soil contamination

- Atmospheric emissions

- Use of raw materials and natural resources

- Regulations and directives regarding environmental impact

In order to minimise the impact on the environment, the manufacturer now provides a number of indications to be followed by all persons handling the engine, for any reason, during its expected lifetime.

- All packaging components must be disposed of in accordance

with the laws of the country in which disposal is taking place.

- Keep the fuel and engine control systems and the exhaust

pipes in efficient working order to limit environmental and noise pollution.

- When discontinuing use of the engine, select all components

according to their chemical characteristics and dispose of them separately.

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

POSSIBLE CAUSE

TROUBLE

FUEL

CIRCUIT

ELECTRIC

SYSTEM

MAINTENANCE

SETTINGS REPAIRS

TROUBLE SHOOTING

THE ENGINE MUST BE STOPPED IMMEDIATELY WHEN:

1) - The engine rpms suddenly increase and decrease;

2) - A sudden and unusual noise is heard;

3) - The colour of the exhaust fumes suddenly darkens;

4) - The oil pressure indicator light turns on while running.

TABLE OF LIKELY ANOMALIES AND THEIR SYMPTOMS

The following table contains the possible causes of some failures which may occur during operation. Always perform these simple checks before removing or replacing any part.

TECHNICAL INFORMATION

Clogged fuel pipes

Clogged fuel filter

Air or water in the fuel circuit

Tank cap breather blocked

Faulty fuel pump

Lack of fuel

Excessive valve clearances Absence of valve clearances Incorrect speed governor leverages Speed governor spring broken or disengaged Idle low Worn out or stuck rings Worn out cylinders Worn out valve guides Bad valve seal Bearing shells of bearing cap - piston rod rocker worn out E.G.R. valve blocked open Governor leverages not running Cylinder head gasket damaged Faulty timing system Supplementary starter spring broken or disengaged

Clogged air filter

Prolonged operation at idle

Incomplete run-in

Overloaded engine

Glow plug fuse burned

Faulty glow plug control relay

Flat battery Unclear or mistaken cable connection Faulty starter switch Faulty starting motor Faulty glow plugs

Engine overheats

Oil and fuel dripping

from the exhaust

Excessive oil

consumption

Oil level increase

Oil preassure too low

White smoke

Black smoke

Non-uniform speed

No acceleration

Engine starts but stops

Engine does not start

High noise level

Inadequate

performance

- 13 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

INJECTION

LUBRICATION

CIRCUIT

COOLING

CIRCUIT

POSSIBLE CAUSE

TROUBLE

Technical info rmation

High oil level Low oil level Dirty or blocked pressure regulation valve Worn oil pump Air to the oil suction hose Faulty manometer or pressure switch Oil in sump suction hose blocked Oil in sump drainage pipe blocked Faulty spray nozzles (Turbo engines only)

Damaged injector Damaged injection pump valve Incorrectly calibrated injector Worn or damaged pumping element Incorrect injection pump delivery setting (delivery equalisation) Hardened pump/injector control rod Cracked or broken pre-combustion chamber Incorrect adjustment of the injection systems (delivery equalisation advance)

Insufficient refrigerant fluid

Defective fan, radiator, or radiator cap

Defective thermostatic valve

Loss of refrigerant fluid from the radiator, hoses, engine crankshaft or water pump. Inside of radiator or coolant lines obstructed.

Defective or worn water pump

Alternator fan drive belt loose or torn

Heat exchange surface of the radiator clogged

Engine overheats

Oil and fuel dripping

from the exhaust

Excessive oil

consumption

Oil level increase

Oil preassure too low

White smoke

Black smoke

Non-uniform speed

No acceleration

Engine starts but stops

Engine does not start

High noise level

Inadequate

performance

- 14 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Technical information

MANUFACTURER AND ENGINE IDENTIFICATION

Engine type

Engine serial number

Maximum operating speed

Number of the customer version

(form K)

- 15 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Name plate for EPA rules applied on rocker-arm cap.

EC-directives certification references punched on the engine plate.

Technical info rmation

- 16 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

N°

Cm³

RPM

g/KWh

Kg/h

l./1'

m³/mm

Kg.

αα

LDW

502

505

22,8:1

3600

9.8(13.4)

9.1(12.4)

8.2(11.2)

28.7

@ 2400

37/1800

326

0,007

910

300

35°

25°

****

LDW

602

611

22,8:1

3600

11.8(16.0)

10.3(14.0)

9.2(12.5)

34.5

@ 2200

37/1800

282

0,007

1640

300

35°

25°

****

LDW

903

916

22,8:1

3600

17.2(23.4)

15.6(21.2)

13.7(18.6)

53,5

@ 2000

37/1800

300

0,012

1650

300

35°

25°

****

1-3-2

LDW

1204

1222

22,8:1

3600

24.2(33.2)

22.0(30.0)

19.9(27.0)

75.1

@ 2200

37/1800

290

0,017

2200

300

35°

25°

****

1-3-4-2

LDW

1204/T

1222

22,8:1

3600

31.0(42.0)

28.5(38.7)

25.8(35.0)

@ 2400

37/1800

305

0,019

101

2860 •

109 ••

300

35°

25°

****

1-3-4-2

LDW 502/602

LDW 903

LDW 1204

LDW 1204/T

Technical information

TECHINICAL SPECIFICATIONS

Cylinders

Bore

Stroke

Displacements

Compression rate

Rpm

N 80/1269/CEE-ISO 1585-DIN 70020

Maximum power NB ISO 3046 - 1 IFN - DIN 6270

NA ISO 3046 - 1 ICXN - DIN 6270

Maximum torque *

Maximum Torque Available @ N° 3 PTO 3600 Rpm

Specific fuel consumption**

Oil consumption ***

Dry weight of engine

Combustion air volume at 3600 Rpm

Cooling air volume at 3600 Rpm

Axial load allowed on crankshaft (both directions)

Instant operation (up to 1 min)

Max tilt Intermittent operation (up to 30 min)

Permanent operation

Combustion sequence

ENGINE TYPE

*At NB power ** Referred to NB power *** Measured at NA power **** Depends on application

•At 3600 Rpm

•• Measured at NB power

- 17 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

N°

Cm³

RPM

g/KWh

Kg/h

l./1'

m³/min

Kg.

αα

LDW

702

77.6

686

22,8:1

3600

12.5(17.0)

11.7(16)

10.7(14.5)

40.5

@ 2000

37@1800

320

0,009

1240

300

35°

25°

****

LDW

1003

77.6

1028

22,8:1

3600

19.5(26.5)

18(24.5)

16.5(22.4)

67.0

@ 2000

37@1800

300

0,013

1850

300

35°

25°

****

LDW

1404

77.6

1372

22,8:1

3600

26.0(35.2)

24.5(33.3)

22.4(30.5)

84.0

@ 2000

37@1800

325

0,019

2470

300

35°

25°

****

LDW 702

LDW 1003

LDW 1404

Tech nic al i nfo r mat ion

Cylinders

Bore

Stroke

Displacements

Compression rate

Rpm

N 80/1269/CEE-ISO 1585-DIN 70020

Maximum power NB ISO 3046 - 1 IFN - DIN 6270

NA ISO 3046 - 1 ICXN - DIN 6270

Maximum torque *

Maximum Torque Available @ N° 3 PTO 3600 Rpm

Specific fuel consumption**

Oil consumption ***

Dry weight of engine

Combustion air volume at 3600 Rpm

Cooling air volume at 3600 Rpm

Axial load allowed on crankshaft (both directions)

Instant operation (up to 1 min)

Max tilt Intermittent operation (up to 30 min)

Permanent operation

*At NB power ** Referred to NB power *** Measured at NA power **** Depends on application

•At 3600 Rpm

•• Measured at NB power

ENGINE TYPE

- 18 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

LDW 502

LDW 602

LDW 903

Technical information

PERFORMANCE DIAGRAMS

N (DIN 70020) Automotive rating, intermittent operation with variable speed and variable load. NB (DIN 6270) Rating with no overload capability, continuous light duty operation with constant speed and variable load. NA (DIN 6270) Continuous rating with overload capability, continuous heavy duty with constant speed and constant load. C (NB) : Specific fuel consumption at NB power Mt : Torque at N. a : Range of application for continuous operation. In case of application outside this range please contact LOMBARDINI.

The above power values refer to an engine fitted with air cleaner and standard muffler, after testing and at the environmental conditions of 20°C and 1 bar. Max. power tolerance is 5%. Power decreases by approximately 1% every 100 m di altitude and by 2% every 5°C above 25°C.

Note: Consult LOMBARDINI for power, torque curves and specific consumptions at rates differing from those given above.

Important

Non-approval by Lombardini for any modifications releases the company from any damages incurred by the engine.

- 19 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

LDW 1204

LDW 1204/T

Technical info rmation

Note: Consult LOMBARDINI for power, torque curves and specific consumptions at rates differing from those given above.

Important

Non-approval by Lombardini for any modifications releases the company from any damages incurred by the engine.

- 20 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

LDW 702 LDW 1003

LDW 1404

Technical information

Note: Consult LOMBARDINI for power, torque curves and specific consumptions at rates differing from those given above.

Important

Non-approval by Lombardini for any modifications releases the company from any damages incurred by the engine.

- 21 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

LDW 502

LDW 602

LDW 903

Technical info rmation

OVERALL DIMENSION

- 22 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

LDW 702

LDW 1204

LDW 1204/T

Technical information

- 23 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

LDW 1003

LDW 1404

350.2

177

641.8

58.8

152.9215.9

30°

129.3

54.8

534.5

359.1

72.9

328.7

685.7

701.7

218

703.5

330.5 236.4

300.5 176.5

86 93

329

361.8

151.5

59.6

145168.4

Tech nic al i nfo r mat ion

LDW 1003 with EGR circuit, Gear-box and CVT (Continuous Variable Transmission)

- 24 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

10 250 300 500 1000 5000 10000

(***)

(**)

(*)

(**)

(*) (*)

(*) (**) (**)

(***)

(**) (**) (**) (**)

(°)

(***)

300

250

Important

Failure to carry out the operations described in the table may lead to technical damage to the machine and/or system.

Engine oil replacement.

Oil filter replacement.

ORDINARY MAINTENANCE

AFTER THE FIRST

50 WORKING HOURS

ORDINARY MAINTENANCE

OPERATION DESCRIPTION

FREQUENCY x HOURS

CHECK

REPLACEMENT

OVERHAUL

ENGINE OIL LEVEL

COOLANT LEVEL

AIR FILTER (DRY-TYPE)

RADIATOR EXCHANGE SURFACE

VALVE CLEARANCE ADJUSTMENT

FAN / ALTERNATOR

BELT STRETCH

COOLING LIQUID HOSES

SETTING AND INJECTORS CLEANING

FUEL PIPES

RUBBER INTAKE HOSE (AIR FILTER AND

INTAKE MANIFOLD)

INTERIOR RADIATOR CLEANING

ALTERNATOR AND

STARTING MOTOR

ENGINE OIL

OIL FILTER

FUEL FILTER

ALTERNATOR BELT

COOLANT

FILTER ELEMENT PANEL AIR FILTER

FUEL PIPES

COOLING LIQUID HOSES

RUBBER INTAKE HOSE (AIR FILTER AND

INTAKE MANIFOLD)

TIMING BELT

DRY AIR CLEANER EXTERNAL

CARTRIDGE

DRY AIR CLEANER INTERNAL

CARTRIDGE

PARTIAL

TOTAL

AFTER 6 CHECKS WITH CLEANING

(*) -In case of low use: every year. (**) -In case of low use: every 2 years. (***) -The period of time that must elapse before cleaning or replacing the filter element depends

on the environment in which the engine operates. The air filter must be cleaned and replaced more frequently In very dusty conditions.

(°) -Once removed, the timing belt should be replaced even if its scheduled motion period is

not over.

EVERY 4000 HOURS

AFTER 3 CHECKS WITH CLEANING

MAINTENANCE - RECOMMENDED OIL TYPE - REFILLING

ENHANCED OIL SUMP

STANDARD OIL SUMP

ROUTINE ENGINE MAINTENANCE

- 25 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

CF CE CD CC CB CA SA SB SC SD SE SF SG

L - 2104 D / E

L - 46152 B / C / D / E

API SJ

SLCH-4 CG-4 CF-4 CF-2

MIL

SAE 20W*

SAE 30*

SAE 40*

SAE 10W-30**

SAE 10W-40**

SAE 10W-60**

SAE 15W-40 **

SAE 20W-60 **

SAE 5W-30 ***

SAE 0W-30 ***

-30-2520

-15-105

0+5+10+15+20

+25+30+

+40+

SAE 10W*

-35-

SAE 5W-40 ***

International specifications

They define testing performances and procedures that the lubricants need to successfully respond to in several engine testing and laboratory analysis so as to be considered qualified and in conformity to the regulations set for each lubrication kind.

A.P.I : ( American Petroleum Institute ) MIL : Engine oil U.S. military specifications released for logistic reasons ACEA : European Automobile Manufacturers Association

Tables shown on this page are of useful reference when buying a kind of oil. Codes are usually printed-out on the oil container and the understanding of their meaning is useful for comparing different brands and choosing the kind with the right characteristics. Usually a specification showing a following letter or number is preferable to one with a preceding letter or number. An SF oil, for instance, is more performing than a SE oil but less performing than a SG one.

API / MIL Sequences

PETROL

A1 = Low-viscosity, for frictions reduction A2 = Standard A3 = High performances

LIGHT DUTY DIESEL ENGINES

B1 = Low-viscosity, for frictions reduction B2 = Standard B3 =High performances (indirect injection) B4 = High quality (direct injection)

HEAVY DUTY DIESEL ENGINES

E1 = OBSOLETE

E2 = Standard E3 = Heavy conditions (Euro 1 - Euro 2 engines ) E4 = Heavy conditions (Euro 1 - Euro 2 - Euro 3 engines ) E5 =High performances in heavy conditions (Euro 1 - Euro 2 -

Euro 3 engines )

ACEA Regualtions - ACEA Sequences

OBSOLETE

DIESEL

PETROL

CURRENT

LUBRICANT

SAE Classification

In the SAE classification, oils differ on the basis of their

viscosity, and no other qualitative characteristic is taken into account. The first number refers to the viscosity when the engine is cold (symbol W = winter), while the second considers viscosity with the engine at régime. The criteria for choosing must consider, during winter, the lowest outside temperature to which the engine will be subject and the highest functioning temperature during summer. Single-degree oils are normally used when the running temperature varies scarcely. Multi-degree oil is less sensitive to temperature changes.

* Mineral base ** Semi-synthetic base *** Synthetic base

SAE- Grade

Maintenance - Recommended oil type - Refilling

- 26 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

AGIP SINT 2000

5W40

API SJ/CF

ACEA A3-96 B3-96

MIL - L-46152 D/E

LDW 1204/T

4,3

4,1

LDW 1404

LDW 1204

LDW 903

LDW 1003

LDW 602 LDW 702

LDW 502

1,5

2,5

1,4

2,4

1,6

2,5

1,5

2,4

3,8

2,3

3,7

3,2

5,2

3,0

5,0

3,2

5,2

3,0

5,1

specifications

PRESCRIBED LUBRICANT

In the countries where AGIP products are not available, use oil API CF/SH for Diesel engines or oil corresponding to the military specification MIL-L-2104 C/46152 D.

CHD ENGINES OIL CAPACITY

OIL VOLUME AT MAX LEVEL (OIL FILTER INCLUDED) OIL VOLUME AT MAX LEVEL (WITHOUT OIL FILTER)

Litres

Sheet STD oil sump.

ENHANCED aluminium oil sump. Sheet STD oil sump.

ENHANCED aluminium oil sump.

* With dynamic balancer

Important

If you are using oil of a quality lower than the prescribed one then you will have to replace it every 125 hours for the standard sump and every 150 hours for the enhanced sump.

Danger – Attention

-The engine may be damaged if operated with insufficient lube oil. It is also dangerous to supply too much lube oil to the engine because a sudden increase in engine rpm could be caused by its combustion.

-Use proper lube oil preserve your engine. Good quality or poor quality of the lubricating oil has an affect on engine performance and life.

-If inferior oil is used, or if your engine oil is not changed regularly, the risk of piston seizure, piston ring sticking, and accelerated wear of the cylinder liner, bearing and other moving components increases significantly.

-Always use oil with the right viscosity for the ambient temperature in which your engine is being operated.

Danger – Attention

-The used engine oil can cause skin-cancer if kept frequently in contact for prolonged periods.

-If contact with oil cannot be avoided, wash carefully your hands with water and soap as soon as possible.

-Do not disperse the oil in the ambient, as it has a high pollution power.

Maintenance - Recommended oil type - Refilling

- 27 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

API CF4 - CG4

API CF - CD - CE

1,90

LDW

1204/T

0,90

1,75

1,30

LDW

602-702

LDW

1204-1404

LDW

903-1003

0,75

LDW

502

FUEL SPECIFICATIONS

To achieve optimum performance of the engine, use good quality fuel with certain characteristics:

Cetane number (minimum 51): indicates the ignition quality. A fuel with a low cetane number may cause problems when starting

from cold and have a negative effect on combustion. Viscosity (2.0/4.5 centistokes at 40°C): this is the resistance to flow and performance may decline if not within the limits. Density (0.835/0.855 Kg/litre): a low density reduces the power of the engine, and density that is too high increases performance

and opacity of the exhaust Distillation (85% at 350°): this is an indication of the mixture of different hydrocarbons in the fuel. A high ratio of light

hydrocarbons may have a negative effect on combustion.

Sulphur (maximum 0.05% of the weight): high sulphur content may cause engine wear. In those countries where diesel has a

high sulphur content, it is advisable to lubricate the engine with a high alkaline oil or alternatively to replace the lubricating oil recommended by the manufacturer more frequently.

The countries in which diesel normally has a low sulphur content are: Europe, North America and Australia.

FUELS FOR LOW TEMPERATURES

It is possible to run the engine at temperatures below 0°C using special winter fuels. These fuels reduce the formation of paraffin in diesel at low temperatures. If paraffin forms in the diesel, the fuel filter becomes blocked interrupting the flow of fuel.

Fuel can be: - Summer up to 0°C

-Winter up to -10°C

-Alpine up to -20°C

-Arctic up to -30°C

For all fuel types, the cetane number cannot be lower than 51.

AVIATION KEROSENE AND RME FUELS (BIOFUELS)

The only Aviatin fuels that may be used in this engine are: JP5, JP4, JP8 and JET-A if 5% oil is added. For more information on Aviation fuels and Biofuels (RME, RSME) please contact the Lombardini applications department.

Fuel with low sulphur content

Fuel with high sulphur content

PRESCRIBED LUBRICANT

ENGINE TYPE

CAPACITY (Litres)

Without radiator

Maintenance - Recommended oil type - Refilling

COOLANT

Danger – Attention

-The fluid coolant circuit is pressurized. Inspections must only be made when the engine has cooled and even in

this case, the radiator or expansion chamber plug must be unscrewed with the utmost caution.

-If an electric fan is installed, do not approach a hot engine since the fan itself could start up even when the

engine is at a standstill.

-Coolant fluid is polluting, it must therefore be disposed of in the correct way. Do not litter.

The anti-freeze protection liquid (AGIP ANTIFREEZE SPEZIAL) must be used mixed with water, preferably decalcified. The freezing point of the cooling mixture depends on the product concentration in water, it is therefore recommended to use a 50% diluted mixture which guarantees a certain degree of optimal protection. As well as lowering the freezing point, the permanent liquid also raises the boiling point.

Coolant refueling

For information concerning the capacity of Lombardini radiators, please contact Lombardini directly. The total volume for refilling the cooling liquid varies according to the type of engine and radiator.

- 28 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Important

To locate specific topics, the reader should refer to the index.

– Besides disassembly and reassembly operations this chapter also includes checking and setting specifications, dimensions,

repair and operating instructions.

– Always use original LOMBARDINI spare parts for proper repair operations.

– The operator must wash, clean and dry components and assemblies before installing them.

– The operator must make sure that the contact surfaces are intact, lubricate the coupling parts and protect those that are

prone to oxidation.

– Before any intervention, the operator should lay out all equipment and tools in such a way as to enable him to carry out

operations correctly and safely.

– For safety and convenience, you are advised to place the engine on a special rotating stand for engine overhauls.

– Before proceeding with operations, make sure that appropriate safety conditions are in place, in order to safeguard the

operator and any persons involved.

– In order to fix assemblies and/or components securely, the operator must tighten the fastening parts in a criss-cross or

alternating pattern.

– Assemblies and/or components with a specific tightening torque must initially be fastened at a level lower than the assigned

value, and then subsequently tightened to the final torque.

DISASSEMBLY / REASSEMBLY

RECOMMENDATIONS FOR OVERHAULS AND TUNING

Important

To locate specific topics, the reader should refer to the index.

– Before any intervention, the operator should lay out all equipment and tools in such a way as to enable him to carry out

operations correctly and safely.

– The operator must comply with the specific measures described in order to avoid errors that might cause damage to the

engine.

– Before carrying out any operation, clean the assemblies and/or components thoroughly and eliminate any deposits or

residual material.

– Wash the components with special detergent and do not use steam or hot water.

– Do not use flammable products (petrol, diesel, etc.) to degrease or wash components. Use special products.

– Dry all washed surfaces and components thoroughly with a jet of air or special cloths before reassembling them.

– Apply a layer of lubricant over all surfaces to protect them against oxidation.

– Check all components for intactness, wear and tear, seizure, cracks and/or faults to be sure that the engine is in good

working condition.

– Some mechanical parts must be replaced en bloc, together with their coupled parts (e.g. valve guide/valve etc.) as specified

in the spare parts catalogue.

Danger - Attention

During repair operations, when using compressed air, wear eye protection.

RECOMMENDATIONS FOR DISASSEMBLING AND ASSEMBLING

- 29 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Dry type air filter

Danger - Attention

Never clean the filtering element with highly flammable solvents Danger of explosion!

Important

Blow compressed air crossways over the external part and inside the cartridge at a pressure no greater than 5 atm or if necessary knock the front of the cartridge repeatedly against a flat surface.

Components: 1 Cover

2 Filter element 3 Support

Air filter specifications:

Filtration level = 13÷14 µm. Filtration area = 4470 cm² per LDW 502, 602, 903, 702, 1003 Filtration area = 7150 cm² per LDW 1204,1404

Â See page 24 for periodic maintenance details.

Air restriction switch

Components:

1 Reset buttione 2 .25" Tab connection

Note: The indicator is calibrated at 600÷650 mm of water column

for LDW 502, 602, 702, 903, 1003, 1204, 1404; and 370÷420 mm of water column for LDW 1204/T.

Oil bath air cleaner ( on request )

Important

Check the sealing rings regularly. Replace the sealing rings if hardening or damage is noted

1 Upper Housing 6 Oil level reference mark 2 Diaphragm Seat 7 Reservoir bowl 3 Diaphragm 8 Outer seal ring 4 Polyurethane upper element 9 Inner seal ring 5 Metal wool lower eleme

Note: Carefully clean the reservoir bowl and both elements with

clean diesel fuel. Blow the lower element dry with compressed air. Dry the upper element by squeezing out excess diesel fuel, then drying with suitable cloths. Fill the reservoir with clean engine oil to the reference mark.

Â See page 24 for periodic maintenance and replacement details.

Disassembly / Reassembly

- 30 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Air filter support

The support for air filter 1 incorporates the intake manifold and the accelerator control box. Remove all bolts that secure the air filter support 1 to the cylinder head. Carefully pull the air filter support from the cylinder head. Using suitable pliers, release the governor spring 2 from the air filter support assembly. Replace the gasket 3.

Components:

1. Exhaust manifold

2. E.G.R. Pipe

3. E.G.R. Valve

4. Vacuum pump

5. Three way union

6. Vacuum pump pipe

7. Thermovalve – vacuum pump

connection pipe

8. Vacuum valve – thermovalve

connection pipe

9. Vacuum valve - E.G.R. connection

pipe

10. Thermovalve

11. Vacuum valve

12. ON-OFF sensor control cam

13. Intake duct

Intake manifold – Remote air filter

- Unscrew the the fastening screws (1) that fix the intake duct to

the intake manifold unit.

-Unscrew the two fastening screws (2) of the intake manifold from

the engine crankcase.

-Lift the intake manifold and disengage the hook of the min/max cylinder from the same manifold (fig. 212).

Disassembly / Reassembly

E.G.R. Circuit

- 31 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Disassembly / Reassembly

E.G.R. Circuit

Operation

The main function of the E.G.R. (Exhaust Gas Recirculation) system is the reduction in emission of NOx (nitrogen oxides), gases harmful to people and the environment, via lowering the combustion temperature. The system takes a certain quantity of exhaust gas from the exhaust manifold 1 (fig. 8) via the E.G.R. pipe (2) to the E.G.R. valve 3. This valve is opened by the vacuum (created in pipes 6, 7, 8 and 9 by vacuum pump 4; fig. 8) only when: a) thermovalve 10 placed in contact with the engine refrigerant

fluid reaches a temperature of 40 °C;

b) the on-off sensor control cam 12 opens the vacuum valve 11 at

a determined accelerator position.

Once the E.G.R. valve is opened, the exhaust gas enters the intake manifold 13 via the intake flange. The same logic controls the closure of the E.G.R. valve.

Disassembly:

- Disengage the control rod catch (1) with a screwdriver from the accelerator control rod (2) (fig. 9).

- Disconnect the accelerator control rod (2) from the accelerator control lever (3) (fig. 9).

- Disconnect the thermovalve – vacuum pump connection pipes (7, fig. 8) and vacuum valve – thermovalve connection pipe (8, fig. 8) from the thermovalve.

- Unscrew the two fastening screws (5) that fix the E.G.R. pipe (6) to the E.G.R. valve (4) (figures 10, 11 and 12).

- Remove the intake manifold. See "Intake manifold – Remote air filter" on page 30 (Figure 7).

- Unscrew the fastening screw of the E.G.R. pipe support bracket (9 fig. 10) from the engine crankcase and disengage the E.G.R. pipe from the exhaust manifold.

Reassembly:

When reassembling pay attention to the repositioning of the gaskets and to the precise connection of the pipes (6, 7, 8, 9, fig.

8).

These pipes should be carefully fitted on the appropriate connections.

 Tighten the screws to specified torque, see "Table of tightening

torques for the main components" on page 100.

Â For the calibration of the E.G.R. system see "E.G.R. calibration"

on page 97.

- 32 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Exhaust maniflod

Danger - Attention

Let the exhaust manifold cool before dismounting to avoid scalds and burns.

When you dismount the exhaust manifold check that the inside is properly clean and free from cracks or breaks. Replace gaskets every time you remove the manifold.

 Tighten nuts at 25 Nm.

Vacuum pump and vacuum pump flange

Unscrew the three fastening screws 1 that fix the vacuum pump to the flange and remove the vacuum pump. Unscrew the fastening screws that fix the flange to the engine crankcase and remove it.

Components:

1. Vacuum pump

2. Clic clamp 86-50

3. Vacuum pump flange

4. Vacuum pump gasket-

5. Vacuum pump flange gasket

6. Three-way union for vacuum pump

7. Vacuum pump pipe

8. Screw

9. Screw

 When reassembling, tighten the screws (8) that fix the flange to

the cylinder head to the specified torque of 10 Nm, and the screws (9) that fix the vacuum pump to the flange at the specified torque of 15 Nm.

Exhaust manifold - engines with EGR

Remove the E.G.R. pipe (1). Unscrew the locking nuts (2) and remove the exhaust manifold and the seal.

Note: When reassembling the exhaust manifold, check that the

inside is properly clean and free from cracks or breaks.

Note: Replace the gasket each time the manifold is reassembled.

 Tighten the nuts at the prescribed torque of 25 Nm.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Alternator/Cooling fan belt drive

Danger - Attention

Check the belt tension only with the engine off.

Tension adjustment. Loosen screws 1 and 2. Adjust the belt tension so that a 100N force at the midpoint of the belt center (as shown) results in a 10-15mm deflection.

Â See page 24 for periodic maintenance details.

Cooling fan

Danger - Attention

Carry out the cooling fan disassembly, only after isolating the positive battery cable to prevent accidental short-circuiting and, consequently, the activation of the starter motor.

Carefully clean and check all blades. Replace the fan even if there is only a single damaged blade.

Â See pages 16÷17 for cooling air flow volume.

Fuel tank (optional)

Danger - Attention

To avoid explosions or fire outbreaks, do not smoke or use naked flames during the operations. Fuel vapours are highly toxic. Only carry out the operations outdoors or in a well ventilated place. Keep your face well away from the plug to prevent harmful vapours from being inhaled. Dispose of fuel in the correct way and do not litter as it is highly polluting.

After disconnecting the fuel pipes unscrew the anchoring brackets' screws and remove the fuel tank. Completely empty the tank and check that no impurities are found inside. Check that cap breather hole is not clogged.

Disassembly / Reassembly

- 34 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Return pulley

Remove the center bolt 1 and slide the pulley from the engine.

Components:

1 Bolt 6 Bearing 2 Washer 7 Spacer 3 Spacer 8 Bearing 4 Pulley 9 Snap Ring 5 Snap Ring

Note: On remounting thoroughly clean out the threads of screw 1

and tighten at 25 Nm.

Flywheel

Danger - Attention

During dismounting be particularly careful not to let the flywheel fall, as this can be very dangerous for the operator. Use protective goggles while removing the starter ring gear.

Unscrew the screws that fasten it to the crankshaft. In order to replace the ring gear, it is necessary to disassemble the flywheel. Cut the ring gear in several places using a chisel and remove it. Heat the new ring gear uniformly and keep it at a temperature of 300°C for 15÷20 minutes. Insert the ring gear into its seat and place it carefully on the rim of the flywheel. eave to the ring gear to cool gently before reassembling the flywheel.

 When refitting tighten the screws at 80 Nm.

Driving pulley

Important

To loosen or screw in screw 1 at the set torque you must always stop the crankshaft and not other parts of the engine.

Locking the crankshaft: remove the engine starter and installing the fixture tool 1460-051. Remove the pulley, after having unscrewed central screw 1 and proceed with the four lateral screws. The central bolt 1 is left-handed.

 When reassembling, apply some Moly-slip antiseizure compound

on the screw thread and tighten at 360 Nm.

Note: When pulley reference mark (A) aligns with the timing cover

reference mark (B), the flywheel side piston is at TDC.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Ringfeder-type rings on LDW 1204-1204/T-1404

It is possible to draw ¾ of the power from the second drive of LDW 1204-1204/T-1404 engines. If you want to draw the entire power it is necessary to mount the Ringfeder rings on the crankshaft handle.

Components:

1 Puleggia appropriata 6 Ringfeder external ring 2 Screw M6 7 Spacer flange 3 Screw M16 x 1,5 8 Shoulder plate 4 Ringfeder internal ring 9 Crankshaft 5 Screw M8

Ringfeder-type rings on LDW 1204-1204/T-1404 - Assembly

Refer to figures 25 and 26. Clean and oil the parts involved in the mounting with engine oil. Insert into pulley 1, the internal ring 4 and the external ring 6, then flange 7 by tightening it temporarily with its screws. Before assembling the pulley 1 in the crankshaft taper, insert shoulder ring 8.

Lock the crankshaft using tool 7107-1460-051.

 Tighten the screws 2 at a torque of 10 Nm.  Tighten the screws 3 at a torque of 360 Nm.  Tighten the screws 5 uniformly in criss-cross pattern in three

distinct phases:

1° phase = 15 Nm 2° phase = 35 Nm 3° phase = torque check.

Timing belt cover

Loosen the five screws and remove the cover.

 When rifitting tighten the screws at a torque of 10 Nm.

Check the peripheral rubber sealing gasket and the two dustprotection rings of the two pulleys, if mounted.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Tightening pulley

Components:

1 Nut 2 Washer 3 Pulley 4 Bearing 5 Shaft/Support 6 Mounting plate 7 Tensioning lever

Timing belt removal

Important

When you remove the distributor belt replace it even if its prescribed operation time has not expired yet.

Danger – Attention

Always check that the positive pole of the battery is insulated.

Remove the belt tensioner 1. Remove the timing belt off the timing pulley.

Â For assembly see fig. 36.

Timing belt / Timing pulley arrangement

Components:

1 Camshaft pulley 2 Timing belt 3 Crankshaft pulley 4 Coolant pump pulley 5 Belt tensioner pulley

Crankshaft timing pulley

Al rimontaggio fare attenzione che la chiavetta rimanga inserita nella propria sede.

Note: Reference mark 1 on the crankshaft timing pulley and

reference mark 2 on the oil pump housing are timing marks. When aligned, No. 1 piston (flywheel side) is at TDC.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Camshaft timing pulley - Reference marks

1 Timing reference mark on cylinder head. 2 Camshaft pulley timing mark, for LDW 502 engines only 3 Camshaft pulley timing mark, for LDW 602, 702, 903, 1003, 1204,

1204/T and 1404 engines.

Camshaft timing pulley - Disassembly/Assembly

Unscrew screw 1 and remove the pulley. No extractor is needed.

 When refitting tighten the screw at a torque of 80 Nm.

Note: Assess any wear caused by the lip of the seal ring on the

pulley tang.

Camshaft timing - Belt Reassembly

Important

Remove the distributor toothed belt from its protective wrapping only when mounting it.

Make the connections for toothed belt fig. 33 and that of pulley fig. 34 fit together. Insert the belt as in figure 35 taking account of the direction of the arrows A impressed on it (direction of rotation). Tighten the nut 1 by hand until the belt tightener rests on surface of the crankcase. Start by mounting the camshaft pulley belt, then mount crankshaft’s pulley. Do not mount driven belts.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Camshaft timing - Belt Tightening and Fastening

Insert the torque wrench in the suitable tool so that the A axis of the key fig. 39 is at 90° to the B axis of the tool in fig. 38. Tighten in clockwise direction at 20 Nm.

 Maintaining the belt tension, tighten nut 3 with another torque

wrench at 40 Nm, after having remounted the drive pulley.

Rotate the crankshaft a few times and check that the tension is as described above.

The check must be carried out with the appropriate Nippon Denso tension measuring instrument (halfway along the longest section of the belt), the value for a cold engine must be 15±2Kg.

Valve timing check

A = Intake valve B = Exhaust valve

Rotate the engine in the normal direction of rotation until the No. 1 piston (flywheel side) approaches TDC- compression stroke Check the balance of intake and exhaust valves A and B placing the two micrometers testers on the valve collars.

Camshaft timing - Belt tightening tool

Position belt preload tool 7107-1460-049 1 over the timing belt idler adjustment ear 2. See "Camshaft timing - Belt Tightening and Fastening".

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Valve timing - Angles

The angle values are determined by turning the driving shaft clockwise.

S =Piston at top dead centre I =Piston at bottom dead centre

αα

α =Intake valve open

ββ

β =Intake valve closed

γγ

γ =Exhaust valve open

δδ

δ =Exhaust valve closed

Timing angles for operating purposes (valve clearance = 0.25 mm)

αα

α =16° before S

ββ

β =36° after I

γγ

γ =36° before I

δδ

δ =16° after S

Timing angles for checking puposes (valve clearance = 2 mm)

αα

α =21° after S

ββ

β =closes in I

γγ

γ =2° after I

δδ

δ =20° before S

Timing angles for operating purposes - LDW 1204/T (valve clearance = 0.25 mm)

αα

α =10° before S

ββ

β =42° after I

γγ

γ =56° before I

δδ

δ =16° after S

Timing angles for checking puposes - LDW 1204/T (valve clearance = 2 mm)

αα

α =31° after S

ββ

β =1° after I

γγ

γ =11° before I

δδ

δ =29° before S

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

SPEED GOVERNOR

The weight-type mechanical governor, is driven directly by the camshaft and is housed with the cylinder head.

Components:

1 Thrust washer 2 Spool 3 Flyweight assembly

Note: In engines with the minimum/maximum (see fig. 49) the

weights are lightened by 25%.

Governor springs for Gensets

In the section view of the leverages the 4 ball bearings A are highlighted. They are mounted on engines for generator sets adjusted at 1,500÷1,800 rpm and on other particular applications on request.

Governor springs

Unscrew the pin that attaches it to the cylinder head. To remove it as shown in the figure it is necessary to dismount the camshaft. It could also be removed from the accelerator box side by unscrewing the torque gearing device. Before reassembling it, check value A (45 to 46 mm) and the parallelism of the two levels B that must not exceed 0.05 mm.

Note: There are 5 different types of regulator springs C. These

change according to the engine adjustment: standard spring for 3,600 rpm, for 3,000 rpm, for 2,400 to 2,600 rpm, for 1,800 rpm and for 1,500 rpm.

Speed governor components

1 Oil seal 2 Screw 3 Support 4 O-Ring 5 Bearing 6 Retainer 7 Screw 8 Flyweight assembly 9 Spool 10 Thrust washer

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Speed governor - Limiting speed governor

With applications for the automotive sector the regulator spring C fig. 45 is replaced by a device (plunger barrel) that only enables a constant speed at the minimum and maximum rpm rating.

Components:

1 Nut 2 Idle speed spring 3 Max. speed spring 4 Case 5 Register 6 Spring ring 7 Actuation rod

Note: There are six maximum springs in a different colours, to

distinguish them from the six respective adjustments.

Red color for ...................... 3000 giri/1'

No color ............................. 3200 giri/1'

Black .................................. 3600 giri/1'

Orange ............................... 3750 giri/1'

White.................................. 4200 giri/1'

Green ................................. 4300 giri/1'.

Brown ................................. 4500 giri/1'

Speed governor - Reassembly

Caution – Warning

While reassembling, check the integrity of the components and check that they operate correctly. Bad operation of the speed governor can cause serious damage to the engine and to people being near to it.

Remount in reverse order to Fig. 44. When inserting the bearing in the camshaft, do it so that the four blocks enter opened, so that they can receive the hose and close over it. Check the integrity of the sealing rings of the cover.

Ti ghten t he thre e screw s at a torq ue of 10 Nm .

Note: With the speed governor mounted the camshaft axial

clearance should be zero.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

53 54

Oil pump - Reassembly

The pump rotors should be coupled on the same side, see references 2 and 3. Replace the O-ring 1.

 Tighten the fastening screws to the crankcase at 25 Nm and those

of the plate at 10 Nm.

Â See page 69 for technical details.

Oil pump - disassembly

The FOCS oil pump is supplied as an assembly. Lombardini therefore recommends that the oil pump be handled as an assembly from a service standpoint Lombardini does not recommend that the oil pump be disassembled, then reassembled for purposes of installation on the engine except during emergency situations.

Rotate the crankshaft until the crankshaft timing pulley keyway is vertical as shown. Remove the oil pump assembly retaining bolts. When the crankshaft timing pulley keyway is vertical, the oil pump drive keyway (A) will be at 3:00 o’clock allowing removal of the oil pump assembly via relief (B).

Rocker arm cover

The engine control components are all on the cylinder head. The cover contains part of the lubrication duct of the camshaft and of the rocker arms, as well as part of the engine vent system.

Components:

1 Oil preassure switch 2 Camshaft lubrification port 3 Rocker arm lubrification port 4 Oil exhaust hose from sump vent system 5 Air valve with oil decanting wire gauze

Note: During remounting be careful with oil exhaust hose 4 that

needs to be properly inserted into its housing on the cylinder head.

Disassembly / Reassembly

- 43 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

56 57

Rocker arm cover gasket

The rocker arm cover gasket A ensures the seal of the lubrication circuit for the camshaft and rocker arm shaft. Always replace it and mount it with especial care above all in zones 1 and 2 where, for greater safety, it is advisable to apply a few drops of silicon sealant.

 Tighten the rocker arm cover screws at a torque of 9 Nm.

Crankcase vacuum regulator valve

Components:

1 Gland Nut 2 Bushing 3 Body 4 Diaphragm 5 Cap / Cover 6 Clip / Lock 7 O-Ring 8 Washer 9 O-Ring

10 Valve 11 Spring 12 Tube 13 Hose

The vacuum relief valve is an engine safety device. Its function is that of limiting the vacuum whenever it tends to increase. Without this, should the air filter be clogged, the oil contained in the carter may be sucked back into intake manifold causing the condition for engine runaway.

Disassembly / Reassembly

- 44 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

Valve / Rocker ar m clearance

Important

Setting should be performed when the engine is cold.

Bring each cylinder piston to top dead center on the compression stroke and set clearance A at 0,20 mm for both the intake and exhaust valves. For greater convenience, clearance check B is accepted. In this case the value is 0.15 mm.

Crankcase breather LDW 502

For LDW 602-702-903-1003-1204-1204/T-1404 engines, the exhaust gases exit from the cylinder head cover, see Fig. 53, 54. In the LDW 502 engine the exhaust gases exit directly from the crankcase via cover 1.

Remove the cover, check the integrity of the air valve and oil decanting wire gauze.

Fuel rail

When removing the fuel feeding pumps A, with the rail holders B, pay attention that the sealing O-rings C remain in their seats.

 When refitting tighten the rail holder screws at a torque of 4 Nm.

Injection pump control rod

Depending on the engine model, the injection pump control rod will link two, three, or four injectors to the engine governor. Screws 1 and 2 are pivoted on the delivery control lever of each pump/injector B, unscrew the screws and remove spring 3. When refitting tighten the screws 1 and 2 at a torque of 1,1 Nm and make sure that they stop on lever B of each pump/injector and not on rod A.

Â To carry out the delivery equalisation of the injection pumps see

page 83.

Â To carry out the timing of the injection pumps and speed

governor see page 95

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

4021-309-206-205WDL

BDE

58,1÷0,10,6÷52,51,7÷0,7

T/4021WDL

BDE

51,1÷5,0

5,6÷59,5

1,7÷0,7

65 66

Pump/injector unit - non-return valve

Non-return valve A immediately stops the engine whenever the stop is activated.

Dimensions (mm):

Note: If the value of B is not achieved, the two rings C are not

subject to enough compression to ensure the seal; any fuel loss would contaminate the lubrication oil and consequently damage the engine, F = metal gasket.

Pump/injector unit - Disassembly

When the removal (but not replacement) of a unit injector is required the following procedure may be used to avoid the need for other adjustments: Rotate the engine until the unit injector cam lobe 2 forces the cam follower 1 to the highest position, then insert a suitable sized (hardened) pin into the hole 3 and rotate the engine until the cam follower 1 is at the lowest position. In this way the injection advance regulator 4 remains calibrated.

Note: If you dismount more than one pump/injector unit, make

sure to reinstall them in the appropriate housing (with relative drive rod 5); before mounting lubricate the drive rod at its two ends with MOLYSLIP, AS COMPOUND 40 type.

Rocker arm assembly

Remove the nuts attaching the rocker arm assembly to the cylinder head.

 When refitting tighten the nuts at a torque of 40 Nm.

The pin, that is hollow inside to allow lubrication, is closed at its ends by two caps.

Note: The rocker arm assembly may be removed without removal

of the unit injectors.

Disassembly / Reassembly

- 46 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

B-C

00,1÷0

000,81÷989,71

140,0÷510,0090,0

030,81÷510,81

limit value

Rocker arm pivot, dismounting and remounting

To remove pivot 1 from the support 2 it's necessary to drill out pin 3 using a 4mm drill bit. On remounting insert a new pin and reinsert it in bearing surface A (0 to 1 mm). Check the rod’s state of wear and tear (diam. B) and that of the rocker arm holes (diam. C). Remove the closing caps 4 at the end and carefully clean inside.

Dimensions (mm):

Camshaft, disassembly

Loosen the screws and remove the cover 1. Check gasket ring 2 for integrity. Remove the drive rod from the fuel pump. Gently remove the camshaft, slight rotations may be required to avoid binding the camshaft lobes against the camshaft bearing surface bores.

Note: The lift pump drive eccentric 3 is included on the flywheel end

of the camshaft and fixed with a screw.

 In case of replacement tighten the eccentric screw at a torque of 80

Nm.

Camshaft, journal and housing measurement

Use an inside micrometer gauge for housing diameters and an outside micrometer gauge for journal diameters.

Disassembly / Reassembly

- 47 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

ABB-A

B-A

060,73÷530,73000,73÷579,63580,0÷530,0071,0

Camshaft journals and housings - Dimensions (mm)

Note: The camshaft journal and cylinder head camshaft bore

dimensions are identical for all LDW-FOCS series engines (LDW 502-602-702-903-1003-1204-1204/T-1404).

limit value

Camshaft lobe measurement

Use an outside micrometer gauge.

Intake / Exhaust / Injection camshaft lobe height - LDW 903

A1 = 1st cylinder intake camshaft lobe A2 = 2nd cylinder intake camshaft lobe A3 = 3rd cylinder intake camshaft lobe

I1 = 1st cylinder injection camshaft lobe I2 = 2nd cylinder injection camshaft lobe I3 = 3rd cylinder injection camshaft lobe

S1 = 1st cylinder exhaust camshaft lobe S2 = 1st cylinder exhaust camshaft lobe S3 = 1st cylinder exhaust camshaft lobe

H = 29,598÷29,650 mm (intake/exhaust camshaft lobe height) H1 = 28,948÷29,000 mm (injection camshaft lobe height)

For 1204/T : H (intake) = 29,438÷29,490 mm,

H (exhaust) = 29,778÷29,830 mm.

All engines in the series (except LDW 1204/T) have intake exhaust and injection cams with the same height of H and H1. If wears on the cams exceeds by 0.1 mm the minimum value given

H and H1, replace the crankshaft.

Disassembly / Reassembly

- 48 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

CYLINDER HEAD, removal

Important

Do not remove the cylinder head when hot to avoid deformation.

lf cylinder head is deformed by more than 0.10 mm, level it off by removing a maximum of 0.20 mm.

Â For the cylinder head tightening procedure see page 57.

Valves

To remove the valves it is necessary to remove the collets; place a spacer under the valve head, press strongly on the spring cap as shown in the picture.

Components: 1 Valve stem

2 Valve stem seal ring 3 Spring seat 4 Spring 5 Spring cap 6 Collets

Valve stem sealing rings - Reassembly

To prevent deformation of the sealing ring 1 as it is inserted onto the valve guide, insert it onto tool "7107-1460-047" 2 (after lubricating the sealing ring) and proceed as shown int the picture ensuring that gasket 1 is completely fitted.

Valve springs

Measure free height with a gauge.

Free height A = 46 mm.

Note: If the free height A is less than 43,5 mm replace the spring.

Disassembly / Reassembly

- 49 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

T/4021-4021-309-206-2054041-3001-207

D 00,92

02,0354°54÷'03°54

T/4021-4021-309-206-2054041-3001-207

C 00,33

04,43

54°06÷'03°06

αα

AB CDE

6,63÷4,63450,11÷540,11810,11÷000,1102,6÷08,558,9÷57,9

ABC

0,04÷5,93020,7÷500,7099,6÷069,6

Valve, specifications

Exhaust valve A

Shaft and head are made of 2 different materials.

2 Welded joint 3 Chromium-plated joint

4 Portion made of:........X 45 Cr Si 8 UNI 3992

5 Portion made of:........X 70 Cr Mn NI N 216 UNI 3992

Intake valve B

Material: X 45 Cr Si 8 UNI 3992

1 = Chromium-plated joint

Val ve guides and valv e gu id e ho usings

Both intake and exhasut valve guides are identical dimensionally and are made from phosphoric gray iron with a pearlitic matrix:

Dimensions (mm):

Note: Valve guides are supplied in finished form,

further machining

is prohibited. Valve guides with outside diameter B increased by 0.5 mm. are available.

Valve guide insertion

Fit the guides with a punch taking account of value A in relation to the cylinder head surface.

Dimensions (mm):

Clearance (mm):

(B-C) = 0,015÷0,050 (B- C) limite usura = 0,10

Disassembly / Reassembly

- 50 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

T/4021-4021-309-206-205WDL

A 540,43÷020,43

°54÷'35°44°06÷'35°95

B 511,43÷601,43

C 140,03÷020,03

611,03÷801,03

4041-3001-207WDL

A 542,53÷022,53

°54÷'35°44°06÷'35°95

B 513,53÷603,53

142,13÷022,13

D 613,13÷803,13

αα

α1

αα

α1

88 89

T/4021-4021-309-206-205WDL

D 8,0÷5,0

1,1

S 7,1÷6,1

0,2

4041-3001-207WDL

D 0,1÷7,0

3,1

S 6,1

0,2

Valve seats and housings - Dimensions

Press valve seats into the housings

Note: Valve seatsare supplied in finished form, further machining is

prohibited.

Valve recess and seat sealing width

Dimensions (mm):

Grind valve seats with fine emery paste. After grinding check the valve recess D relative to the cylinder head surface and the seat sealing width S.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

91 92

Pre-combustion chamber

Components:

1 Pre-combustion chamber 2 Pre-heating glow plug 3 Pre-combustion chamber ring nut 4 Cylinder head

The pre-combustion chamber does not normally require removal or service, if service is necessary follow the procedure described below.

Pre-combustion chamber ring nut removal

The pre-combustion chamber is fixed to the cylinder head by a ring nut, so before removing the pre-combustion chamber it is necessary to unscrew the pre-combustion chamber ring nut. Use the special tool "7107-1460-027" 1 to romve the ring nut 2.

Pre-combustion chamber, removal

Before proceeding with removing the pre-combustion chamber it is necessary to remove the pre-heating glow plug. Screw special tool "7107-1460-030" 1 into the pre-combustion chamber. Carefully, but sharply, slide the slide hammer 2 up the special tool shaft until contact is made with end of the tool. The hammer effect of the special tool will extract the pre-combustion chamber 3.

Note: There are many types of precombustion chambers for the

various engines described as follows.

- LDW 502

- LDW 602-903-1204-1204/T.

- LDW 702-1003-1404.

Pre-combustion chamber, installation

The pre-combustion chamber has a hole on the side where the preheating glow plug 2 must be inserted. When re-fitting introduce the the new pre-combustion chamber into the cylinder head so that the side hole of the pre-combustion chamber aligns with the glow-plug hole. To make sure that both the holes align appropriately use tool "71071460-031" 1 inserting it into the glow-plug hole.

 Tighten the ring nut twice:

1st tighten at a torque of 100 Nm, 2nd tighten at a torque of 180 Nm.

Chack that clearance A is 3,68÷4,1 mm.

Disassembly / Reassembly

- 52 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

97 98

101

100

102

Oil pan, removal

Danger - Attention

-The used engine oil can cause skin-cancer if kept frequently in contact for prolonged periods.

-If contact with oil cannot be avoided, wash carefully your hands with water and soap as soon as possible.

-Do not disperse the oil in the ambient, as it has a high pollution power.

Remove the fixing screws. Insert a spacer 1 in the forward and rear main bearings. Detach the silicon from the main bearing rubber bulb seals.

When re-mounting apply Silicone " Dow Corning 7091" as shown in the picture.

 Tighten the screws at a torque of 10 Nm.

Before starting the engine make sure that:

1) the oil drain plug is tightened correctly

2) the engine has been refilled with the prescribed quantity of oil (see

page 26).

PISTON

Remove the connecting rod big end cap. Remove the piston-connecting rod assembly.

Note: The LDW 502’s piston is different from the LDW 602 in

terms of its combustion chamber. The LDW 1204/T piston is different from that of the LDW 1204 in term of its cooling nozzle’s slot bleed and an insert in the first section’s hollow. The Ricardo type of combustion chamber is used for LDW 702-1003-1404 engines.

Stop pin rings, dismounting and remounting

Extract the ring inserting a pointed tool in hollow A.

On remounting, insert rings with the points turned downwards inside the corners (

αα

α = 15°).

Disassembly / Reassembly

- 53 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

103

T/4021-4021-309-206-205WDL

A 000,27÷099,17

049,17÷039,17

070,0÷050,0

B 010,27÷000,27

059,17÷049,17

C 020,27÷010,27

069,17÷059,17

4041-3001-207WDL

A 000,57÷099,47

049,47÷039,47

070,0÷050,0

010,57÷000,57059,47÷049,47

C 020,57÷010,57

069,47÷059,47

Piston, disassembly and inspection

Remove the stop rings and remove the pin, see fig. 101. Remove the piston rings and clean the slot. Measure diameter Q at height A from the base of skirt (A = 9 mm). If the diameter is worn more than the 0.05 mm minimum given value, replace piston and rings.

Note: The provided oversize elements are of 0.50 mm and 1.00 mm

Piston, class

The pistons are subdivided according to their diameters into categories: A, B, C. These references, are shown on the top of the piston (see fig. 100).

Piston supply:

Pistons at the nominal diameter are only supplied in category A. Pistons oversized by 0.50 and 1.00 mm are supplied with reference to the increased level on the piston crown: Ø 72.5 - Ø 73 for LDW 502-602-906-1204-1204/T engines and Ø 75.5 – 76.0 for LDW 702-1003-1404 engines.

Class Ø Cylinder - mm Ø Piston - mm Clearance - mm

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

°154,0÷52,0

0.1°254.0÷52,0

°354,0÷02,0

105

106 107

521,0÷090,0

580,0÷050.0

570,0÷040,0

104

limit value

Piston ring

Piston rings - End gaps (mm)

Place piston rings squarely into the unworn part of the lower cylinder and measure the end gap A.

Piston ring, Clearance between grooves (mm)

Piston, weight

Weigh pistons when replacing them in order to avoid unbalance.

Important

The difference in weight should not exceed 4 g.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

108

109

111

110

Piston ring, mounting order

A = 1° ring (internal tapered and torsional) B = 2° ring (internal tapered and torsional) C = 3° Oil control ring D = Chrome-plated area E = Chrome-plated area

Note: When there is writing on the surface of a piston ring, mount

that surface with face upward.

Piston clearance

The piston in the TDC (top dead centre) position may extend or be short of the upper surface of the cylinder. Determinare the clearance of each piston using a dial indicator to measure the difference between the two surfaces (piston crown and upper cylinder surface). To determine the piston clearance and, by consequence, which copper gaske is most suitable it is necessary to consider the A value of the piston that projects furthest.

Piston, assembly

Important

Before re-mounting lubrificate the piston pin, piston, cylinder and conncecting rod big end bearing.

Couple the piston to the connecting rod inserting the pin, after lubricating it, just via thumb pressure. Insert the two pin stop rings and check that they are properly housed in their seats, see fig. 101. Using piston ring compression pliers, introduce the piston into the cylinder so that combustion chamber A is directly under the precombustion chamber parallel to the head. Couple the piston/connecting rod to the crankshaft.

Â For tightening the head/connecting rod see fig. 115-116.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

309-206-205WDL

)mm(A

60.1÷79.0

84.0÷93.0

61.1÷70.1

52.1÷71.184.0÷04.0

T/4021-4021WDL

)mm(A

60.1÷79.0

84.0÷93.0

61.1÷70.1

52.1÷71.184.0÷04.0

3001-207WDL

)mm(A

19.0÷28.0

36.0÷45.0

10.1÷09.0

01.1÷20.136.0÷55.0

4041WDL

)mm(A

19.0÷28.0

16.0÷25.0

10.1÷29.0

01.1÷20.116.0÷35.0

112

Head gasket

Important

Remove the cylinder head gasket seal from its protective covering only when you are going to mount it.

The gasket thickness is identified by the number of notches located in point B.

Choose the appropriate gasket considering that each A value on the table corresponds to a gasket with: no hole, one hole, two holes, or for the 1404 one notch, two notches, three notches. The A value relates to figure 111. Each time you dismount the head you must replace the gasket.

N° of holes Piston clearance

0 holes

1 hole

2 holes

N° of holes Piston clearance

1 hole

2 holes

3 holes

N° of holes Piston clearance

1 hole

2 holes

3 holes

N° of notches Piston clearance

1 notch

2 notches

3 notches

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

113

114

115

Cylinder head assembly

Use a torque wrench equipped with a device for angular tightening. Measure the length of each screw (normal length = 89.5÷90.5 mm). Replace it if it exceeds 92 mm. Proceed as follows.

Cylinder head tightening procedure LDW 1204-1204/T-1404

Following the numerical order shown in the diagram, the bolts must be tightened in three phases:

phase = 50 Nm

2nd phase = Rotate the wrench 90° in a clockwise direction. 3rd phase = Rotate the wrench again 90° in a clockwise direction.

Cylinder head tightening procedure LDW 502-602-702-903-1003

Important

Once the head has been correctly tightened, it should not be retightened except if it is disassembled again. Before mounting it is advisable to lubricate stem, shank and underhead of screws with SPARTAN SAE 460 oil.

A = For LDW 502-602-702 models B = For LDW 903-1003 models

Following the numerical order shown in the diagram, the bolts must be tightened in three phases:

phase = 50 Nm

2nd phase = Rotate the wrench 90° in a clockwise direction. 3rd phase = Rotate the wrench again 90° in a clockwise direction.

For LDW 502 with pressure cast (aluminium) crankcase:

With head H tightening bolts: 1st phase = 60 Nm

With head 8.8 tightening bolts: 1st phase = 40 Nm

2nd phase = Eseguire una rotazione

della chiave in senso orario di 90°.

3rd phase = Proseguire con una

rotazione della chiave in senso orario di 90°.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

116

117

119

118

CONNECTING ROD

Caution – Warning

While reassembling the big end bearings, we suggest cleaning all parts thoroughly, as well as proper greasing in order to avoid risks of seizure at the first start.

Big end bearing

After connecting rod from crankshaft disconnection, check the following. While reassembling, be sure the two centring notches A an B are on the same side.

 Tighten the connecting rod big end cap screws simultaneously at

a torque of 40 Nm.

Note: The big end bearing is supplied both at the nominal value

and undersized by 0.25 and 0.50 mm. In the LDW 502 engine with light alloy crankcase the connecting rod is aluminium type and not provided with connecting rod big end bearing and small end bush.

Connecting rod with bearings and pin

Dimensions (mm):

A =126,48÷126,52

=106,98÷107,02..... (for LDW 502)

B =18,015÷18,025

=20,015÷20,025..... (for LDW 702-1003-1204/T-1404)

C =40,021÷40,050..... (bearing tightened at 40 Nm)

D =17,996÷18,000

=19,996÷20,000..... (for LDW 702-1003-1204/T-1404)

E =50,900÷51,100

=54,000÷55,100..... (for LDW 702-1003-1204/T-1404)

(B-D) = 0,015÷0,039 (B-D) limit value = 0,060

Nota: When driving the small end bearing make sure both oilholes

are aligned.

Connecting tod, weight

Weigh connecting rods when replacing them in order to avoid unbalance.

Important

The difference in weight should not exceed 10 g.

The difference in weight of the pre-assembled connecting rod, piston and pin must not exceed 14 g.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

120 121

122

124

125

123

Connecting rod alignment

Utilizzare un calibro con piano di riscontro o un comparatore come in figura. Controllare l'allineamento degli assi utilizzando lo spinotto del pistone; lo scarto A = 0,015 mm;. limite 0,030 mm. Piccole deformazioni si possono correggere sotto una pressa agendo con sforzi graduali.

CYLINDERS

Reset the dial gauge with a calibrated ring: check the diameter D in points 1, 2 and 3; repeat the same operation rotating the dial gauge by 90° at the same heights. Check any wear in zone X where the piston rings operate and if it is greater than the 0.05 mm max limit given adjust the cylinder to the next increased value.

72,000 mm for LDW 502-602-903-1204-1204/T engines; 75,000 mm for LDW 702-1003-1404 engines.

Cylinder roughness

Caution – Warning

Do not treat the cylinder’s internal surfaces with an emery cloth.

The angle of the crossed processing marks must be between 45° and 55°. These must be uniform and distinct in both directions. Average roughness must be between 0.5 and 1 µm. The whole surface of the cylinder affected by contact with the piston rings must be rendered with the plateau method.

Cylinder, class

The pistons (A, B, C) locations are shown on the piston crown while those for the cylinders are found on the crankcase in the points shown by the arrows, see picture.

Note: For LDW 502 with an aluminium crankcase, the cast iron

cylinders can be adjusted normally to increase values by 0.5 and 1.0 mm. The cylinders are not to be changed.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

126

127

129

128

130

Rear and forward main bearing caps

Important

Before the final tightening, check the coplanarity of the two levels with a ground bar

On remounting the rear main bearing cap 1 replace the lateral rubber gaskets 2, keeping in mind that projections A and B of the support must be 0,5÷1,0 mm; cut off any exceeding portions. Do the same with the front bearing cap. Before reintroducing the bearings in the crankcase, place between their surfaces two plates C and D - 0.1 mm thick - se.no.71071460-053.

 Tighten the screws at a torque of 60 Nm.

Note: It is advisable to apply a few drops of silicon sealant on the

surface of the gasket slot 2.

Central main bearing caps

The central support caps are marked with locations that can be numbers as in the diagram or dots. The same locations are given on the crankcase. Couple the caps with the same references and on the same side. In any case locate the bearing’s two centring notches that are to be found on the same side.

 Tighten the screws simultaneously at a torque of 60 Nm.

Check the clearances between the bearings and the journal

Use the ”Perfect Circle Plastigage” type calibrated wire A and put it at the centre of the bearing with a bit of grease.

 Tighten the screws at a torque of 60 Nm.

Find out the clearance value checking the wire’s compression with the appropriate graduated scale supplied in the same pack and available on the market.

Â For clearance values between the journals, connecting rod pin

and the relevant bearings see page 64.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

ABCD

58,0÷08,04305161°5

αα

131 132

133

134 135

A mm

313,0÷031,05,0

B mm

01,32÷50,3205,32

Piston coolant nozzles

Caution – Warning

The piston has a recess so that during up-down movements and vice versa it cannot come into contact with the nozzle. When remounting the nozzle be careful that it is placed so that when the piston goes past it is in the

centre of the recess.

They are in the supercharged LDW 1204/T engine and are housed near the main bearings.

Components:

1 Washer 2 Nozzle 3 Washer 4 Joint (tighten to 12Nm) 5 Valve (opening pressure = 1÷1.2 bar) 6 Spring

Characteristics (mm):

Shoulder half rings

So as to keep them in their seats during assembly, put a bit of grease. The half-rings must be assembled with the slots A as in the figure. Thickness of half-rings is equal to 2.31÷2.36 mm. They are supplied as spare parts as increased thickness 0.1 and 0.2 mm, see below.

Crankshaft axial clearance

After tightening the main bearings measure the axial clearance A between the crankshaft flywheel side shoulder and the main bearing half rings.

If the clearance is not within the given value check value B. If need be, fit oversized half rings, see below.

Limit value

Ref. Clearance

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

C**B*A

dtS

029,22÷787,22001,32÷050,32

313,0÷031,0

021,32÷789,22003,32÷052,32

022,32÷780,3004,32÷053,32

023,32÷781,32005,32÷054,32

136

138

137

Shoulder half rings, oversized elements

Dimensions (mm):

* A of Fig. 134. ** B of Fig. 135.

Grinding B as per relevant table, you can mount the following half rings:

1st Oversized element Half rings 1 and 2 + 0.10 mm on both sides

of the bearing

2nd Oversized element Half rings 1 and 2 + 0.10 mm on one side

of the support and + 0.20 mm on the other side.

3rd Oversized element Half rings 1 and 2 + 0.20 mm on both sides

of the bearing.

Crankshaft front and back oil seal rings

Caution – Warning

An ambient temperature below -35°C may damage the rings.

The front oil seal ring 1 inserted into the oil pump cover and the back one 2, in the flywheel side flange. If warped, hardened, or cracked, replace them.

For the replacement:

- Carefully clean the housing

-Keep the ring immersed in engine oil for about half an hour.

-Drive it into its housing with a buffer exercising a uniform pressure on the whole front surface. Be sure that the two surfaces A and B meet on the same level.

-Refill the interior hollow with grease and lubricate the seal lip with thickened oil.

Note: Before major engine overhaul, in case of oil leakage in the

seal area of rings 3 and 4, you can remedy this by replacing the rings and pushing them about 2 mm deeper with respect to the previous ones. If the rings are black it means zones 3 and 4 of the crankshaft are tempered. In this case it is necessary to remount a ring of the same colour. If the rings are brown it means that zones 3 and 4 of the crankshaft are not tempered. In this case it is necessary to remount brown coloured rings.

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

139

140 141

142

T/4021-4021-309-206-205WDL

A )mm(000,84÷489,74

009,74

B )mm(000.04÷489,93

009,93

4041-3001-207WDL

A )mm(000,15÷189,05

009,05

B )mm(

000.04÷489,93009,93

Crankshaft, lubrication lines

Caution – Warning

During repairs, when compressed air is used it is important to wear protective goggles.

A = Crankshaft LDW 502 B = Crankshaft LDW 602-702

Put the crankshaft in a bath of crude oil. Remove the caps and clean lines 1 and 2 or 3 and 4 with a bit; blow with compressed air. Reposition the new caps in their seating and check the seal.

Note: The LDW 502 crankshaft with aluminium crankcase is not

interchangeable with the cast iron crankcase, having different counterweights.

Journal and connecting rod pins diameters

Dimensions (mm):

Crankshaft, check journals and crank

Use a micrometer for the outsides.

Disassembly / Reassembly

Ref.

Tolerance

Limit value

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

T/4021-4021-309-206-205WDL

C )mm(489,74÷610,84

550,84

D )mm(050,04÷120,04

001,04

4041-3001-207WDL

C )mm(950,15÷320,15

890,15

D )mm(

050,04÷120,04001,04

T/4021-4021-309-206-205WDL

A-C )mm(470,0÷220,0

002,0

B-D )mm(660,0÷120,0

031,0

4041-3001-207WDL

A-C )mm(870,0÷320,0

002,0

B-D )mm(

660,0÷120,0031,0

143

144

Clearances between the bearings and corresponding pins

See figures. 143 ÷ 144.

Dimensions (mm):

Nota: Both for crankshaft bearings and for connecting rod big end

bearings internal diameter are undersized by 0.25 and 0.50 mm.

Main bearings and connecting rod big ends diameters

Dimensions (mm):

The dimensions given refer to tightened bearings.

Â For tightening torque see figures 116 e 126.

Ref.

Tolerance

Ref. Clearance

Ref.

Clearance

Limit value

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

145

146

......................................................................................................................................................

Hydraulic pump drive

A = Third drive

You can mount a 2P hydraulic pump on the third drive with Bosch flanging, or a 1 PD type one. You can draw 7 KW of power from the third drive corresponding to a 37 Nm torque at 3600 rpm (engine revolutions). Drive ratio, engine revs/pump revs = 1:0.5.

Third drive, components

1 Splined sleeve 2 Toothed pinion 3 Seal ring 4 Flange for 1 PD hydraulic pump 5 Seal ring

Note: Sleeve 1 also includes the fuel pump control cam and is

fastened with the same standard cam screw, with a tightening torque of 80 Nm + 90°.

 Tighten pinion 2 to the hydraulic pump at 45 Nm

Disassembly / Reassembly

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

147

148

149

TURBO CHARGER

Only the LDW 1204/T is supplied with the turbocharger. The LDW 1204/T is available in two versions:

TD 025 03C 2.8 for 3600 r/min TD 025 03C 2.0 for 3000 r/min.

TURBOCHARGER

Turbocharger pressure testing

Install a 0-2bar pressure gauge at position A after removing the existing plug. Start the engine and operate at low idle for five minutes to allow warm-up. Increase the engine speed to 3000 r/min or 3600 r/min (depending on engine specification while applying full Nb load to the engine).

Â See page 10 for the power output curve.

The gauge pressure, at full speed, full load, should be 0.87-0.91 bar (655÷685 mm Hg). If the pressure setting does not reach specification, adjust the turbocharger waste gate 8 as is defined on page 48.

Turbocharger components

1 Waste gate tube 2 Attuatore 3 Collare 4 Corpo turbina 5 Anello seeger 6 Chiocciola compressore 7 Spessore 8 Dado 9 Controdado

10 Albero con turbina 11 Segmento 12 Parafiamma 13 Cuscinetto 14 Seeger 15 Spessore 16 Segmento 17 Deflettore olio 18 Manicotto reggispinta 19 O-ring 20 Cuscinetto reggispinta 21 Anello reggispinta 22 Cuscinetto 23 Anello seeger 24 Anello seeger 25 Supporto cuscinetti

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

150

......................................................................................................................................................

Turbocharger west gate adjustment - Regolazione corsa asta comando valvola " Waste gate "

Disconnect westgate tube 7 from the turbocharger compressor side. Using a T-joint connect a pressure gauge 4 (scale 0 to 2 bar) and with the compressed air network pipe complete with reducer 5. The network air supply pressure must be from 1.5 to 2 bar. Make a hole B in the pressure gauge pipe of 1.55 mm in diameter. This will help bleeding some air and stabilizing pressure in the pressure gauge. Set up a dial gauge (6) so that the feeler is rested on terminal 2. Via the pressure reducer 5 convey some air to the actuator so as terminal 2 is pushed forwards by A (A=1 mm). The pressure read in the pressure gauge must be 830÷890 mm Hg (1.11÷1.19 bar). If the pressure is lower than the given value proceed as follows. Unscrew locknut 1. Remove split pin 9 and disconnect rod 8, “waste gate” control valve. Keeping the rod steady tighten terminal 2 until you reach the calibration pressure. During the rotation of terminal 2, the rod should not undergo any torsion.

Turbocharger

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

151

Danger – Attention

-The engine can be damaged if allowed to operate with insufficient oil. It is also dangerous to add too much oil because its combustion may lead to a sharp increase in the rotation speed.

-Use suitable oil in order to protect the engine. Nothing more than lubrication oil can influence the performances and life of an engine.

-Use of an inferior quality oil or failure to regularly change the oil will increase the risk of piston seizure, will cause the piston rings to jam and will lead to rapid wear on the cylinder liner, the bearings and all other moving parts. Engine life will also be notably reduced.

-The oil viscosity must suit the ambient temperature in which the engine operates.

Danger – Attention

-Old engine oil can cause skin cancer if repeatedly left in contact with the skin and for long periods of time. Wear protective gloves to avoid touching used oil.

-If contact with the oil is unavoidable, you are advised to wash your hands with soap and water as soon as possible. Dispose of old oil in the correct way as it is highly polluting.

LUBRIFICATION CIRCUIT

Components:

1 Pressure gauge 9 Oil filler cap 2 Rocker shaft 10 Camshaft 3 Connecting rod pin 11 Oil pressure regulating valve 4 Oil filter cartridge 12 Oil pump 5 Journal 13 Crankshaft 6 Oil drain plug 14 Oil suction filter 7 Oil dipstick 15 Turbosupercharger with corresponding pipes only fitted in LDW 1204/T models. 8 Bleed

LUBRIFICATION CIRCUIT

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

3001-309-207-206-2053,4÷4

5,3÷3

4041-T/4021-40215,6÷6

3001-309-207-206-2053,91

5,4÷4

4041-T/4021-40215,82

152

154

155

153

Internal oil filter and oil sump return pipe

Clean with petrol the internal oil filter 1 and oil sump return pipe 2, blow also some compressed air. Replace sealing rings 3 and 4.

 Tighten oil drain plug at a torque of 40 Nm.

Oil pump

The oil pump mounted on LDW 502-602-903 engines has a lower delivery rate than that mounted on LDW 1204-1204/T engines. Oil pump delivery test at 1000 revs per minute with an oil temperature of 120°C.

Delivery test at 3600 rpm with an oil temperature of 120°C.

Oil pump, clearance between rotors

Measure the clearance A between teeth as in figure; the maximum value is 0.171 mm. Clearance wear limit should be 0.250 mm.

Â See page 42 for assembly and disassembly.

Lubrification circuit

Engine Delivery (l/1') Pressure (bar)

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

157

158

156

Oil filter cartridge

Components:

1 Gasket 2 Plate 3 Rubber element 4 Spring 5 Filtering element 6 By-pass valve 7 Spring

Characteristics:

Maximum operating pressure: ............................. 7 bar

Maximum bursting pressure: ............................... 20 bar

Degree of filtration: .............................................. 15

µµ

By-pass valve calibration:.................................... 1,5÷1,7 bar

Total filtration surface: ......................................... 730 cm

Total filtration surface for LDW 1204 engine: ..... 1450 cm2.

Oil pressure check

Once remounted fill the engine with oil, fuel and coolant. Remove the pressure switch, fit a union and connect a 10 bar pressure gauge. Start the engine and check how pressure is affected by oil temperature.

Nota: With a maximum operating temperature of 120°C at 900 rpm

the oil pressure must not be less than 1 bar.

Oil pressure regulating valve

Components:

1 Valve 2 Spring 3 Gasket 4 Screw cap

Spring length = 27.50÷27.75 mm Blow the valve’s seating with compressed air and carefully clean all the components before remounting them.

Nota: The valve begins to open at a pressure of 4.5÷5.5 bar.

Lubrification circuit

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

......................................................................................................................................................

Lubrification circuit

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

159

Components:

1)Coolant filler plug 6) Circulation pump

2) Compensating tank 7) Fan

3) Thermostatic valve 8) Radiator

4) Cylinder block 9) Heat exchanger with relevant pipes. Only fitted in LDW 1204/T engine.

5) Thermostat for liquid temperature indicator

COOLANT CIRCUIT

Danger – Attention

-The coolant circuit is pressurised. Do not check it before the engine has cooled down and, also in that case, open the radiator cap or expansion tank plug with caution.

-When there is an electric fan do not approach a hot engine because it could also come on with the engine off.

-The liquid coolant is a pollutant and therefore must be disposed of with care according to environmental provisions.

COOLANT CIRCUIT

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

160

161

162 163

Radiator and compensation, check and seal tank cap.

Remove the cap from compensation tank cap and check that the liquid is at the correct level. Replace the cap with a new one provided with hand air pump socket. Compress air at a pressure of 1 bar for about two minutes. Check that there are no drips in the radiator. The tank cap is supplied with a vacuum relief valve 1 and an overpressure valve 2. Overpressure valve opening pressure of 0.7 bar.

Thermostatic valve

1 - Stainless steel or brass casing 2 - Wax bulb 3 - Air relief hole

Characteristics:

Opening temperature: ........ 83°÷87°C

Max stroke at: .................... 94°C = 7 mm

Liquid recycling: ................. 30÷80 l/h.

Coolant circulation pump, components

1 Rotor 2 Front seal gasket 3 Pump casing 4 Exhaust hole 5 Bearing 6 Pulley 7 Shaft

Note: The pump for LDW 1204-1204/T-1404 engines is different

from the one of the other series (fig. 148) due to the presence of a ring between rotor 1 and gasket 2.

Coolant circuit

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

164

165

166

167

Fuel feeding / injection circuit

Components: 1 Fuel Tank

2 Fuel filter 3 Fuel feeding tube 4 Fuel lift pump 5 lnjection pump 6 Injector 7 Fuel rail passage rubber joint 8 Injector exhaust pipe 9 Fuel tank cap 10 Solenoid valve

Note: The tank complete with filter is supplied on request.

Fuel pump drive rod projection

The protrusion A of drive rod 2 from the cylinder head surface is

1.66÷2.18 mm. The check must be carried out with cam 1 idle as in the figure.

 Block the two fuel pump fastening nuts simultaneously at 24 Nm.

Check the length of the drive rod and if it is not the right size, replace it. Drive rod length = 153.15÷153.35 mm.

Fuel lift pump

Components:

1 Fuel lift pump 2 Push rod 3 Seal ring

The fuel pump is membrane type. It is driven by camshaft cam via a drive rod. It is equipped with an external manual fuel lever.

Characteristics:

With the control cam at 1500 rpm the delivery rate is 75 l/hours and the self-adjusting pressure is at 0.55 to 0.65 bar.

Fuel filter detached from the tank (on request)

1 Air relief valve 2 Bearing 3 Cartridge 4 Rubber element 5 Filtering element

Cartridge characteristics:

Filtering paper: ................................ PF 905

Filtering surface: .............................. 2400 cm

Degree of filtration: .......................... 2÷3

µµ

Maximum operating pressure: ........ 4 bar

Â See page 24 for periodic maintenance details.

FUEL SYSTEM

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

168

169

Pump/injector unit

Designed by LOMBARDINI, the pump/injector is exclusive to FOCS series engines. The injection system includes two, three, four identical pumps/ injector units, each one of which feeds a cylinder.

Note: On pumps/injector units of recent construction (for serial

numbers and references see the table on page 78) the pump has been modified (see fig. 174). Following to this modification and others like the elimination of cap 20 of fig. 169 the method of checking the static injection advance has changed as well, fig. 187-188 as that of injector setting, fig. 178.

Pump/injector unit, components

1 Seeger ring A Ring nut

2 Tappet B O-ring 3 Stop plate C Nozzle 4 Plunger D Spacer 5 Spring E Pressure rod 6 Screw F Spring 7 Bearing G Spacer 8 Lever I Casing 9 Ring nut L Control spiral

10 Plunger guide O-ring M Plunger guide 11 Cylinder 12 Delivery valve 13 Gasket 14 Spring 15 Filler 16 Pin  When remounting the injector tighten ring nut A at 70 Nm 17 O-ring 18 Non-return valve 19 O-ring 20 Cap screw (old type) 21 Metal gasket (new type)

Fuel system

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

170

171

172

Plunger barrel ring nut assembly/disassembly

To disassemble ring nut 9 fig. 169, use the suitable wrench A se.no. 7107-1460-029

 When refitting tighten it a torque of 34 Nm.

Plunger injection pump reassembly

To be able to insert the plunger in its barrel press with a finger and at the same time slowly rotate lever 8 fig. 171 until guide M of the plunger fig. 172 enters the lever seating.

Note: If by mistake the plunger is mounted with the spiral in the

wrong direction the pump won’t function (there is no danger that the engine runs away).

Injection pump assembly/disassembly

Disassemble the unit following the progressive order of fig. 169. Reassemble following the same steps in reverse order. During reassembly, turn the plunger spiral L towards the non-return valve 19, as follows.

Fuel system

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

AB C D E F

205

703.09565.5

05.1

55.1

05.1

35.1

569.9

530.01

565.9

536.9

9.0

206-205

4021-309

582.09560.6

T/4021

4041-3001-207

092.09565.6

5,9006332÷91

5,9002142÷51

00383÷53

5,5

30,2÷00,2

35,1÷05,1

00,01

6,9

7,0

173

174

175

Pumping element (old-type injection pump)

1 Plunger 2 Upper plunger section 3 Plunger barrel 4 Delay notch 5 Control slot

Dimensions (mm):

Pumping element

1 Plunger 2 Upper plunger section 3 Plunger barrel 4 Delay notch 5 Control slot

Pump/injector unit se.no. 6590.285 control data.

1 Delivery control lever on stop position. 2 Delivery control lever on maximum delivery position.

Injector setting pressure: 140÷155 bar * Rpm rating is that of the crankshaft.

nominal value

inlet hole diameter

outlet hole diameter

Rod stroke form max delivery

position (mm)

start position

/strokeRpm (*)

Aluminium crankcase

INJECTION

PUMP

Dimensions

Fuel system

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

231-2

272-0

235-2

272

272-1

272-

272+ 235-4 235-4 235-3 235-4

6590.262

6590.283

6590.235

6590.272

6590.285

6590.286

6590.307

6590.290

6590.287

6590.290

502 - 602 - 903 - 1204

502 MINI CAR

1204/T

502 - 602 - 903 - 1204

502 MINI CAR

1204/T

702 - 1003 - 1404

11° - 13°

4° - 6°

8° - 10°

8° - 10° < 2999 g/min

12° - 14° > 3000 g/min

11° - 13°

6° - 8°

8° ÷ 10° < 2999 g/min

12° ÷ 14° 3000÷3600 g/min

13° ÷ 14° > 3600 g/min

176

Lombardini injection system is being steadily implemented, seeking the best performance of its engines. For this reason the pump injector body has been modified three times in the course of its evolution. Three different pump injectors are shown in the top figure.

Old type injector pump: it is characterised by its high pressure hole Intermediate injector pump: is characterised by not having the high pressure hole (the hole can be there but it is only used

to control the injector and injection advance) and by the locating peg between inlet and outlet holes.

Current pump injector: it is characterised by its offset inlet and outlet holes. These are also oversized, due to the

absence of the high pressure hole.

REFERENCE

N°

CODE N°

ENGINE TYPE

INJECTION

ADVANCE VALUE

SPECIAL TOOLS

LOCATING PEG

OFFSET HOLES

HIGH PREASSURE HOLE

REFERENCE NUMBER

OLD TYPE INJECTOR PUMP

INTERMEDIATE INJECTOR PUMP CURRENT PUMP INJECTOR

ADVANCE .......................... 1460.028 + 1460.024

INJECTOR SETTING ........ 1460.028

T.D.C. ................................. 1460.048

ADVANCE .......................... 1460.028 + 1460.024

INJECTOR SETTING ........ 1460.028

T.D.C. ................................. 1460.048

ADVANCE .......................... 1460.028 + 1460.024

INJECTOR SETTING ........ 1460.028

T.D.C. ................................. 1460.048

ADVANCE .......................... 1460.056

INJECTOR SETTING ........ 1460.028

T.D.C. ................................. 1460.048

ADVANCE / INJECTOR SETTING ........ 1460.074

T.D.C. ..................................................... 1460.048

ADVANCE / INJECTOR SETTING ........ 1460.074

T.D.C. ..................................................... 1460.048

ADVANCE / INJECTOR SETTING ........ 1460.074

T.D.C. ..................................................... 1460.048

ADVANCE / INJECTOR SETTING ........ 1460.074

T.D.C. ..................................................... 1460.048

Fuel system

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

177

178

179

181

180

Injector, setting (old type)

Connect the injector to a hand pump after removing cap screw 20 fig. 169. By means of the tool - se.no. 7107-1460-028 - check that the setting pressure is 130÷145 bar. Adjust, if necessary, by changing the spacer located under the spring. There are eleven different spare part spacers from 1 to 2 mm. When you replace the spring, the setting should be made at a pressure higher than 10 bar to compensate for adjustments in operation. Check the needle seal by slowly actuating the hand pump for 10 seconds, until you reach abt. 130 bar. If the nozzle drips, replace it.

Injector, spark arrester

Every time you remove the pump/injector you must replace the spark arrester, the copper gasket, the oil O-ring, as well as the 2 fuel O-rings. Insert the spark arrester in the injector housing with surface A pointing upwards.

 Tighten simultaneously both nuts that fasten it to the head at 20

Nm. For engines with the injectors fixed with self-locking nuts, tighten the nuts at 23 Nm.

Â See page 24 for periodic maintenance details.

Injector, nozzle projection

To avoid excessive compression of the spark arrester A, fig. 181, check projection B of the nozzle fig. 179. B = 6.80÷7.05 mm. If this measure is larger put spacer 2 between ring nut 1 and copper gasket 3.

0.25 mm thick spacers are available.

Setting of injector according to current pump/injector unit

Remove the non-return valve leaving its metal gasket and fit a cap screw in its place, that is part of tooling 7107-1460-074. Mount then head 1 and coupling 2. Then connect a hand pump as shown in the picture. The pressure setting must be 140÷155 mm bar.

Fuel system

- 80 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

ααααα

205WDL

)mm(

T/4021-4021-309-206WDL

)mm(

4041-3001-207WDL

)mm(

°81749.1763.2864.2

°71937.1511.2502.2

°61345.1678.1659.1

°51853.1156.1127.1

°41481.1044.1105.1

°31220.1242.1692.1

°21178.0950.1501.1

°11337.0198.0039.0

°01606.0737.0967.0

°9194.0795.0326.0

°8883.0274.0394.0

°7792.0263.0873.0

°6812.0662.0772.0

182

183

ααααα

206-205

4021-309

582-09561-2729992÷0051°01÷°8

206-205

4021-309

582-09561-2720003>°41÷°21

*205703-0956+2720063÷0003°21÷°01

3001-207

4041

092-09564-5329992÷0051°01÷°8

3001-207

4041

092-09564-5320063÷0003°41÷°21

3001-207

4041

092-09564-5320063÷>°51÷°31

T/4021092-09564-5320063÷0051°8÷°6

Injection advance control and regulation

-Dismount the rocker arm cover, see page 40.

-Position the device on the head, in contact with cylinder no. 1.

-Mount the dial gauge on the valve controlled by tool ref. 1460.048.

-Via lever 1 of the tool, open the valve until it comes into contact

with the piston.

-Then rotate the crankshaft until the TDC is read in the dial gauge. Then reset the hundredths.

-Remove the fuel pipes.

-Remove the O-ring in contact with the non-return valve and replace it with the appropriate gasket - equipment component part ref. 1460.074. Once the check has been completed, remove the gasket and refit the O-ring. Connect tool 1460.074 on pump n° 1. This will automatically position the control lever to the maximum delivery. The tool is provided with 3÷4 couplings for connection to a tank that must be not lower than 30 cm from the pumps level. Coupling 2 is equipped with a plastic pipe with internal drip collecting wire.

-Put cylinder 1 under compression and open the tank tap. Fuel diesel will start to flow out from coupling 2.

-Slowly rotate the engine towards TDC 1 until the diesel fuel stops leaking out.

-At this point with lever 1 (of fig. 182) move again the valve until it touches the piston and read on the dial gauge how many hundredths are missing from the previously reset value (TDC).

-To convert hundredths into degrees, consult the table below.

-Repeat the operation on the other cylinders.

Injection advance for currently used pump/injector unit

* With aluminuim crankcase

Engine Code Reference n° Rpm

Fuel system

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

184

185

186

187

Static injection advance tuning

If the injection advance value found does not correspond to the previously described value, adjust the screw E and repeat the test. Rotating screw E by ½ turn will change the injection advance by 5°. If turned clockwise, injection is advanced. In the opposite direction, injection is delayed.

Tester and special coupling for injection advance control (Oldtype injection pump)

1 Special coupling. Serial number: 7107-1460-028 2 Injection advance tester. Serial number: 7271-1460-024.

Remove the cap on the pump/injector casing and in its place screw on coupling 1. On this coupling tighten the tester 2.

Note: When reassembling the cap on the pump/injector unit, check

its seal.

TDC (Top Dead Center) references

D coincides with A =TDC of 1

cylinder of all series engines, of 4

cylinder LDW 1204-1204/T-1404, and of 2

cylinder LDW 502.

E coincides with A =TDC of the 2nd cylinder LDW 903-1003. F coincides with A =TDC of 2nd cylinder LDW 602-702., of 3

and 2nd cylinder LDW 1204-1204/T-1404.

G coincides with A =TDC of 3rd cylinder LDW 903-1003.

Note: Following the arrow’s rotation direction, the combustion

order for LDW 903-1003 is D, G, E (1st - 3rd - 2nd cylinder respectively. As to LDW 1204-1204/T-1404 the sequence is

D, F, D, F (1st– 3rd– 4th and 2nd cylinder).

Injection advance references on timing belt protector

The method of checking injection advance is essentially the same as that described in fig. 182 with one difference: instead of using the device se.no. 7107-1460-048 with which you measure piston lowering with respect to the Top Dead Centre, you use references A and C on the timing belt protector and reference D located on engine pulley. When D coincides with A the piston has reached its TDC. When D coincides with C the piston is in injection advance position.

Fuel system

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

188

189

190 191

Static injection advance regulation

Fill the tank and operate the fuel pump. Set the pump/injector delivery control rod (ref. A fig. 187) at halfstroke. Bring the piston to the top dead centre of compression. Fit a 13 mm hexagon wrench on the injection advance adjusting screw lock nut. By turning the wrench forth and back you prime the injection pump, thus enabling the tester to be drained. With the piston at its TDC, operate lever 2 fig. 188 and bring the drain valve into contact with the piston. Then reset dial gauge. Go back ¼ of a turn moving the crankshaft anticlockwise. Then turn forward again very slowly observing the fuel level inside the tester. As soon as the level changes, then stop. You reached the static injection advance. By actuating lever 2 check piston lowering with respect to the TDC that shall be between 0.89 and 1.24 mm for LDW 602-903-1204, and between 0.73 and 1.02 for LDW 502 engine model. The table on page 80 shows both piston lowering expressed in mm, with respect to the TDC, and the corresponding rotation of the crankshaft, expressed in degrees. The static injection advance in degrees

αα

α = 11° to 13° refers to all

engines for adjustments from 1500 / 3600 rpm.

Test head B assembly

Remove fuel pipe A and mount one test head B in its place per pump/injector. The test heads complete with pipes are supplied together with instrument ref. 7104-1460-069.

Preliminary steps to pump/injector unit delivery balancing test

Closing the oilhole

To perform this test you must remove the rocker arms cover and close hole 1 with an M 8x1.25 or M 10x1.5 screw (on latest model engines) not longer than 8 mm. Also remove the copper gasket. If the camshaft and rocker arms are dry, lubricate them with engine oil.

Note: If you only want to check the nozzle it is not necessary to

balance the deliveries; provided that when you dismount the rod you do not loosen adjusting screws 1 and 2 (fig. 193).

Fuel system

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

192

193

Injection pumps delivery balancing

In case the balancing error read on the test pieces is greater than 2 cm³/min, then injection pumps deliveries should be adjusted. Plate 4 and rod 3 are blocked by screws 1 and 2. Loosen them. Move plate 4 rightwards with respect to rod 3 if you want to increase delivery. If moved leftwards delivery decreases. Make very small movements with the plate.

 Tighten screws 1 and 2 at a torque of 1,1 Nm.

Note: Each time a pump/injector is replaced it is necessary to

balance the deliveries.

Instrument connection

Place the instrument 1, se.no. 7104-1460-127 at least 20 cm above the pump/injector level. Connect pipe A (outlet from every instrument test piece) with pipe A (inlet of every pump/injector) and pipe B (return to the instrument) with pipe B (outlet from the pump/injector). Open tap 2 and 3 of each pipe and fill the instrument with diesel. Start the engine and bring it to 1500 rpm idle running. Close the fuel supply to the engine from the instrument’s tank using lever 4 and after 1 minute observe the levels in the test piece. If a level goes down more than the others it is necessary to decrease the delivery of the corresponding pump (see below) and vice versa to increase the delivery if the level increases.

Fuel system

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

ELECTRIC CONTROL PANEL WITH AUTOMATIC ENGINE STOP

(UPON REQUEST)

AUXILIARY TERMINALS

(+) Positive pole under key (6.3)

(-) Negative pole - Earth (6.3)

Signal for temp. water instrument (4.75)

Signal for electric rev. counter (4.75)

Oil pressure signal (4.75)

Protected socket available (4.75)

Rear connection – Jumper with 6 for alternator protection

Control panel auxiliary terminals 2, 4, 5, 6, 7, 10 and 12 are also accessible from the front, under the fuse access door.

BLACK

BLUE

RED

ORANGE

PURPLE

BLUE

RED

BLACK

GRAY

WHITE

GREEN

LIGHT BLUE

PINK

BROWN

PUSH-ON CONNECTION

STARTING

MOTOR

BATTERY C ONNECT ION

POST

GLOW-PLUGS

FUEL

SOLENOID

ALTERNATO R

CONNECTOR

EXCITATION TERMINAL

COOLANT

TEMP.THERMISTOR

(FOR GLOW TIMER/

RELAY)

COOLANT HIGH

TEMP. SWITCH

LOW FUEL

LEVEL SWITCH

LOW OIL PRESSURE

SWITCH

BLACK

AIR FILTER RESTRICTION

INDICATOR

COOLANT TEMP.

SENDING UNIT

YELLOW

ELECTRIC SYSTEM

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

194

195

Alternator, Iskra 14V 33A

Nominal voltage ................. 14V

Nominal current output ...... 33A

Maximum Rpm .................. 12.000 giri/1'

Maximum peak Rpm ......... 13.000 giri/1'

Voltage regulator AER 1503 Rotation (viewed at puley end): Clockwise

 Tighten nut 1 at a torque of 35÷45 Nm.

Alternator, Iskra 14V 33A - Performance Curve

The curve was obtained at room temperature of +25°C with 13 V battery voltage.

Note: The rpm shown on the table are referred to the alternator.

Engine rpm/alternator rpm ratio, with driving pulley diameter 88 mm = 1:1.23

Electric System

- 86 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

205

2,14401266003

1,14401266003

207-206

1,14401266003

6,16600388033

3001-309

1,14401266003

6,16601388033

4041-4021

1,14401266003

6,16600388033

T/4021

1,15555266003

6,16600388033

196

Electric starting layout (12V) with Iskra alternator 14V 33A

1 Alternator

2 Starter Motor 3 Battery 4 Glow Plugs 5 Coolant temperature thermistor 6 Glow Plug Controller / Timer 7 Key Switch 8 System Fuse, 30A for LDW 502-602-702; 50 A for LDW 903-

1003; 80 A for LDW 1204-1204/T-1404.

9 Fuse (Accessory)- 5A

10 Fuel Solenoid Valve 11 Glow Plug Indicator Lamp 12 Coolant High Temperature Lamp 13 Coolant High Temperature Switch 14 Oil Pressure (Low) Lamp 15 Oil Pressure Switch 16 Alternator Charging Lamp 17 Air Filter High Restriction Indicator Lamp 18 Air Filter Restriction Switch 19 Low Fuel Level Lamp 20 Low Fuel Level Switch

A Accessory Position B Off Position C On Position D Starting Position

Note: Battery 3 not supplied by LOMBARDINI.

For assembly we recommend a battery with the following characteristics, see table below.

Engine type

Starter motor class

(epicyclic type) Kw

Capacity

K20 - Ah

Rapid discharge

intensity

(DIN Standards at

-18° C) A

Capacity K20 - Ah

Rapid discharge

intensity

(DIN Standards at

-18° C) A

Normal starting conditions

Heavy-duty starting conditions

(max allowed)

Electric System

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

197

198

Alternator, Marelli type AA 125 R 14V 45A

Characteristics:

Nominal voltage ........................................ = 14V

Nominal current output ............................. = 45A

Maximum Rpm ......................................... = 14000 giri/1'

Maximum peak Rpm (for 15') ................... = 15000 giri/1'

Bearing, Pulley End .................................. = 6203-2Z

Bearing, Voltage Regulator End ............... = 6201-2Z/C3

Voltage regulator ...................................... = RTT 119 A

Rotation (viewed at puley end): Clockwise

Note: Use only high temperature grease when servicing bearings

 Tighten nut 1 at a torque of 60 Nm.

Alternator, Marelli type AA 125 R 14V 45A - Performance Curve

The curve was obtained at room temperature of +25°C with a costant 13 V battery voltage.

P1 = Power Output (KW) I = Current Output (Amps)

ηη

η = Efficiency

Note: The RPM shown is that of the alternator. The value of the

rpm axis must be multiplied by 1000. Alternator speed is a function of engine speed and the crankshaft pulley diameter. If the engine pulley is 88 mm, then the alternator speed ration is 1.3:1. If the engine pulley is 108 mm, then the alternator speed ratio is 1.6 : 1.

Electric System

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

199

200

Electric starting layout (12V) with Marelli type AA 125 R 14V 45A alternator

1 Alternator

2 Starter Motor 3 Battery 4 Glow Plugs 5 Coolant temperature thermistor 6 Glow Plug Controller / Timer 7 Key Switch 8 System Fuse, 30A for LDW 502-602-702; 50 A for LDW 903-

1003; 80 A for LDW 1204-1204/T-1404.

9 Fuse (Accessory)- 5A

10 Fuel Solenoid Valve 11 Glow Plug Indicator Lamp 12 Coolant High Temperature Lamp 14 Oil Pressure (Low) Lamp 15 Oil Pressure Switch 16 Alternator Charging Lamp 17 Diode 18 Air Filter Restriction Switch 19 Air Filter Restriction Switch 20 Low Fuel Level Lamp 21 Low Fuel Level Switch

A Accessory Position B Off Position C On Position D Starting Position

Note: Battery 3 not supplied by LOMBARDINI, for battery

characteristics see page 89.

Flywheel Alternator

12V 20A with three cables at output 12V 30A with two cables at output

1 Flywheel 2 Ring gear 3 Magnet ring (Rotor) 4 Stator

Electric System

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

201

202

Alternator battery charger curve 12V 20A

(three cables at output)

This curve is obtained at 20°C. The statistical charging output of the flywheel alternator is +10% to 5% of the values shown.

Alternator battery charger curve 12V 30A

(two cables at output)

This curve is obtained at 20°C. The statistical charging output of the flywheel alternator is +10% to 5% of the values shown.

Electric System

- 90 -

FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

ASTEA

ASIRPAS

ASCIN

ITACUD

~G53,68,0

RR05,92,1

+B05,92,1

ELL57,45,0

C52,68,0

203

204 205

Electric starting layout (12V) with flywheel alternator

1 Alternator

2 Starter Motor 3 Battery 4 Glow Plugs 5 Coolant temperature thermistor 6 Glow Plug Controller / Timer 7 Key Switch

8 System Fuse, 40A 9 Fuse (Accessory)- 5A 10 Fuel Solenoid Valve 11 Glow Plug Indicator Lamp 12 Coolant High Temperature Lamp 13 Coolant High Temperature Switch 14 Oil Pressure (Low) Lamp 15 Oil Pressure Switch 16 Alternator Charging Lamp 17 Voltage regulator 18 Air Filter High Restriction Indicator Lamp 19 Air Filter Restriction Switch 20 Low Fuel Level Lamp 21 Low Fuel Level Switch

A Accessory Position B Off Position C On Position D Starting Position

Note: Battery 3 not supplied by LOMBARDINI.

Cable

colour

Yellow

Red

Green

Brown

Conncetion dimensions

Width Thickness

Voltage regulator connections

Electric System

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

206

207

208

STARTER MOTOR - Bosch DW 12V 1,1 KW

Rotation: Clockwise

A = 17,5÷19,5 mm (distance from starter mounting flange to ring gear face)

Note: Please refer to your local BOSCH distributor for service parts,

repair criterion and warranty service.

Starter motor, Bosch 12V 1,6 Kw

Rotation: Clockwise

A = 29,50÷31,5 mm (distance from starter mounting flange to ring gear face)

Note: Please refer to your local BOSCH distributor for service parts,

repair criterion and warranty service.

Starter motor, Bosch DW 12V 1,1 KW - Performance Curve

The curve was obtained at room temperature of -20°C with a fully charged 66Ah battery.

U =Starter Motor Voltag n =Armature r/min I =Absorbed Amperage P =Starter Output Power (KW) M =Starter Output Torque (Nm)

Electric System

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

0007 0042

001

064

02-

02+ 04+

5.92÷5.32

5.61÷5.31

5.01÷5.8

0.8÷0.6

0.7÷0.4

02305+

≤

210

212

211

209

Pre-heating plug control unit with coolant temperature sensor

To avoid white smoke immediately following start-up post-heat for about 5 seconds, see table

Â For electrical connections see figures 196-199-203.

Pre-heating glow plug

Characteristics:

Nominal voltage ........................................ 12,5V

Current absorption .................................... 12A÷14A after 5 seconds

Sheath surface temperature ..................... 850°C after 5 seconds.

Components:

1 Sheath 2 Primary Heating Coil 3 Secondary Heating Coil

 When remounting tighten at a torque of 20 Nm.

Post-heat

Glow-plug heat time

(sec.)

Pre-heat

Coolant temp.

°C

Resistance

(ohm)

Thermistor input

Heating stop

Starter motor, Bosch DW 12V 1,6 KW - Performance Curve

The curve was obtained at room temperature of -20°C with a fully charged 88 Ah battery.

U =Starter Motor Voltag n =Armature r/min I =Absorbed Amperage P =Starter Output Power (KW) M =Starter Output Torque (Nm)

Electric System

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

213

215

214

216

Oil pressure switch (Fig. 215)

Characteristics:

Opening pressure: 0,15÷0,45 bar (for gen-sets: 1,4 bar).

 Tightening torque 25 Nm.

Coolant high temperature lamp sensor (Fig. 216)

Characteristics:

Circuit ............................................. single pole

Voltage range ................................. 6÷24 V

Max. Power Absorption.................. 3 W

Closing temperature ...................... 107÷113°C

 Tightening torque 25 Nm.

Temperature sensor for control unit

In engines fitted with the above-mentioned type of control unit, the introduction of the glow plugs depends on a temperature sensor that varies preheating temperature in relation to the coolant temperature.

Characteristics:

Temperature range ............... -30 ÷ +50°C

Voltage range ........................ 6÷24 V

Temperature max. ................ 150°C

Max. tightening torque. ......... 30 Nm.

Electric System

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

217

218

219

SPEED SETTINGS

Setting the idle minimum (standard)

After filling the engine with oil, fuel and coolant, start it and let it warm up for 10 minutes. Turn the screw 1 to adjust the idle speed at 850 to 900 rpm. Tighten then the locknut.

Note: If you loosen screw 1 speed decreases. To the opposite

direction speed increases.

Setting the idle maximum (standard)

After setting the idle speed turn screw 2 and regulate the idle maximum at 3800 rpm. Block then the locknut. When the engine reaches its setting power, the maximum rpm will stabilise at 3600 rpm.

Note: If you loosen screw 2 speed increases.

To the opposite direction speed decreases.

Pump injection delivery standard setting without dynamometric brake

This adjustment must be performed with the dynamometric braked engine. Without this the regulation is approximate. In this case proceed as follows:

-Unlock the maximum flow limiter lock nut.

-Fully screw in flow limiter C.

-Run the engine to the maximum speed, that is 3800 rpm.

-Loosen flow limiter C until the engine revs start to decrease.

-Screw flow limiter C by 2.5 turns.

-Tighten the lock nut.

Note: If the engine under maximum load emits too much smoke

unscrew C. Tighten C if at this load there is no smoke and if the engine does not reach its maximum power.

SETTINGS

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

220 221

222

223

Setting the stop

Remove the rocker arms cover and completely unloosen screw B. Push rod A to the right and keep it in this position; see figure. Tighten screw B until it touches rod A. Release rod A and tighten again screw B by a 0.5÷1.0 turn. Tighten the lock nut.

Pump/injector unit timing with speed governor

-Loosen the screws C of each pump/injector unit.

-If it is not connected, connect spring D to rod A (with this

operation the speed governor blocks are closed).

-Move plates B of each pump/injector unit rightwards; see figure

(with this operation the pumps/injector unit are at their maximum delivery).

-Tighten screws C at 1.1 Nm. Re-balance the deliveries.

Note: Spring D is the start-up fuel supplement spring: with the

engine stopped pull rod A to the right by bringing the pump/ injector unit delivery to the maximum value, until the speed governor comes into operation with the engine running

Injection pump flow limiter and engine torque gearing device

Flow limiter C has the function of limiting the injection pump’s maximum delivery. The same mechanism acts also as a torque gearing device. Indeed, under torque, spring N operating lever L overcomes the resistance of spring M located in the plunger barrel. The stroke H that the torque gearing device allows to be carried out by lever L, will increase the injection pump delivery and the torque will hit its maximum value.

Important

The stroke H varies depending on which engine torque gearing device is fitted on the engine.

Settings

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

wKhwK/g

205

002215,5381÷291992÷582

006327,7511÷021043÷623

206

002253,7741÷551972÷562

006329,998÷39043÷623

309

002280,1199÷501472÷162

006360,5185÷06243÷823

4021

002287,4157÷97272÷852

006322,0244÷8,54043÷623

T/4021006305,9253÷63092÷482

224

Pump/injector unit delivery setting with braked engine

1)Run the engine to the maximum speed.

2) Screw flow limiter C (see fig. 219).

3) Load the engine up to the power and number of revs required by

the application’s manufacturer.

4) Check that consumption is within the values allowed for in the

settings table (see below). If consumption is not within the given figures, it is necessary to change the balance conditions shown to the brake, altering the load and the speed governor. Redo the consumption check on the stabilised engine.

5) Unscrew limiter C until the engine rpm start to decrease. Lock the

limiter using the lock nut.

6) Completely release the brake and check the rpm at which the

engine stabilises. The performance of the speed governor must meet the class required by the application’s manufacturer.

7) Stop the engine.

8) Recheck the valve clearance with the engine cold.

Specific fuel consumption

Time (sec) per

100 cm

Power*

( NB curve )

RpmEngine

Required settings (as most commonly applies)

* Refers to power curve NB, see pages 18÷20 and after run-in.

Settings

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

225

E.G.R. calibration

Mount a T-branch on vacuum valve - E.G.R. valve connection pipe (1), and connect it to a vacuum pressure gauge with 1 bar bottom scale so as to be able to read the degree of vacuum within the pipe.

Note: It is also possible to use a mercury column, 1 metre long,

since the maximum suction pressure exerted by the vacuum pump is 720 mmHg.

Adjust the position of the accelerator lever via the regulator block, so that the internal adjusting nut (2), is about 5 mm from the end of the thread.

Accelerate the engine up to 3.600 rpm (with valve closed: this means that the value showed on the vacuum pressure gauge or on the mercury column should be 0. In case it is different from zero, adjust the regulator block nuts to move it, in relation to the rod (3), in the direction that goes from the flywheel to the timing.

With the brake at a braking curve N=constant, “load” the engine slowing it down to 2.800 rpm.

Acting on the accelerator look for the E.G.R. valve closing point (pressure of the vacuum pressure gauge or mercury gauge equal to zero).

Note: Pay attention to determine the precise closing point: by

slightly accelerating the engine the vacuum value in the E.G.R. operation pipe should immediately increase.

Measure the engine consumption in order to calculate the mm3/ stroke value.

If the calculated value is less than 18.8 mm3/stroke, adjust the adjusting nut making it closer to the end of the rod (3) to “increase the calibration”.

When the required value of 18.8 mm3/stroke has been reached (and a power of around 7 KW) tighten the adjusting nuts.

Settings

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

- If the engine is not to be used for long periods, check the storage environment, the type of packaging and make sure these conditions will allow proper maintenance. If necessary, cover the engine with protective sheeting.

-Do not store the engine directly on the ground, in damp environments, in areas exposed to the elements, near sources of danger, including less visible hazards such as high-voltage power lines, etc.

Caution - Warning

If the engine is not to be used for more than 1 month, it is necessary to apply protective measures that are valid for 6 months (see “Protective treatment”).

Important

If, after the first 6 months, the engine is still not to be used, it is necessary to carry out further measures to extend the protection period (see “Protective treatment”).

1 -Check that the engine oil and coolant are up to level.

2 -Fill up with fuel containing 10% AGIP RUSTIA NT 3 -Run the engine at minimum idle speed for 15 minutes. 4 -Switch off the engine. 5 -Remove the lubrication oil. 6 -Fill the sump with protective oil: AGIP RUSTIA C. 7 -Start the engine and check for fuel and oil leaks. 8 -Bring the engine to ¾ of the maximum speed for 5-10 minutes. 9 -Switch off the engine.

10 -Empty the fuel tank completely. 11 -Spray SAE 10W oil on the exhaust and intake manifolds. 12 -Close all openings to prevent foreign bodies from entering. 13 -Thoroughly clean all external parts of the engine using suitable products. 14 -Treat non-painted parts with protective products (AGIP RUSTIA 100/F). 15 -Loosen the alternator/fan belt. 16 -If necessary, cover the engine with protective sheeting.

Caution - Warning

In countries in which AGIP products are not available, find an equivalent product. AGIP RUSTIA NT: MIL-L-21260 P10, grade 2 AGIP RUSTIA C: MIL-L-644-P9 AGIP RUSTIA 100/F: MIL-C-16173D.

Important

After a year of engine inactivity, the coolant loses its properties and must be replaced.

ENGINE STORAGE (NOT INSTALLED)

PROTECTIVE TREATMENT

STORAGE

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

PREPARING THE ENGINE FOR OPERATION AFTER PROTECTIVE TREATMENT

After a period of inactivity and before installing and running the engine, it is necessary to carry out a few measures in order to ensure that it runs at maximum efficiency.

1 -Remove the protective sheeting. 2 -Eliminate any blockages in the exhaust and intake ducts. 3 -Use a cloth soaked in degreasing product to remove the external protective treatment. 4 -Remove the intake manifold. 5 -Inject lubrication oil (no more than 2 cm

) into the valves and install the intake manifold.

6 -Adjust the alternator/fan belt tension. 7 -Turn the flywheel manually to check the movement of the mechanical parts. 8 -Refill the tank with fresh fuel. 9 -Start the engine and run at ¾ of the maximum speed for 5-10 minutes.

10 -Switch off the engine. 11 -Remove the protective oil to replace with engine oil. 12 -Introduce new oil (see “Lubricants”) up to the correct level marked on the dipstick. 13 -Replace the filters (air, oil, fuel) with original spare parts. 14 -Empty the cooling circuit completely and pour in the new coolant up to the correct level.

Caution - Warning

Over time, a number of engine components and lubricants lose their properties, even when the engine is not in use, and so it is important to consider whether they need replacing, based not only on the mileage, but also on age and wear.

15 -Install the engine and make the necessary connections and unions. 16 -Make sure that electrical contacts are intact and efficient. 17 -Check that the engine oil and coolant are up to level. 18 -Start the engine and keep at minimum speed for a few minutes. 19 -Check for leaks and, if necessary, find and eliminate the cause. 20 -Switch off the engine. 21 -Double check that the engine oil and coolant are up to level.

Storage

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06

1,1

40 12 20 15 10

9 60 10

5 24 40

20*

40 80 12

** 50 15

360

80 25 40

***

M 3 spec.

8x1

8x1,25

12x1,25

20X1,5

6x1

M 10

M 6

M 6 5x0,8 8x1,5 M 10

8x1,25

M 8 M 10

10x1,25

M 6

30x1,5

10x1,25

12x1,5

6x1

16x1,5 sin.

10x1,25

12x1,5 12x1,5

TCEI 4x1,5

10x1,5

62÷63 - p. 44

116 - p. 58 131÷132 - p. 61 210÷211 - p. 92

55 - p. 43

126÷130 - p. 60

97÷98 - p. 52

50 - p. 41

167 - p. 74

39 - p. 38

181 - p. 79

68 - p. 45

146 - p. 65

90÷96 - p. 51 13÷14 - p. 32

22÷24 - p. 34

34 - p. 37

215 - p. 93 152÷153 - p. 69 113÷115 - p. 57

64- p. 44

21 - p. 34

270 270 638

Silicon

7091

270 242

242

TORQUE SPECIFICATIONS AND USE OF SEALANT

Table of tightening torques for the main components

POSITION

Torque

( Nm )

Diam. & pitch

( mm )

Riference

(figure and page n°)

Sealant

Injection pump control rod Connecting rod **** Union for the nozzle (LDW 1204/T) Glow-plugs Oil filter cartridge (M 20x1,5 union) Camshaft bearing (M 6 screws) Rocker arm cover Main bearing caps Oil pan

Camshaft bearing support screw Glow-plug cable nuts Fuel lift pump nuts Belt tensioner nut External Stop control lever nut Pump/injector unit fixing nut Rocker arm assembly support nut Fuel pump cam Flywheel side oil seal ring flange Pre-combustion chamber ring nut Vacuum pump fixing screws Belt tensioner Crankcase Speed governor lever screw Driving pulley Camshaft timing pulley Oil pressure switch Oil drain plug Cylinder headù Injection pipe Flywheel

*Tighten the two nuts that fasten each pump/injector unit at the same time. For engines with the injectors fixed with self-

locking nuts, tighten the nuts at 23 Nm. ** Tighten these in two phases: the first phase at 100 Nm, the second phase at 180 Nm. See page 51, figures 95-96. *** See page 57 **** Aluminium connecting rod with 35 Nm tightening torque.

Lombardini LDW 502, LDW 903, LDW 602, LDW 1204, LDW 1204/T Workshop Manual

Specifications and Main Features

Frequently Asked Questions

User Manual