Ruggerini MD150, MD190, MD191, MD151 Workshop Manual

1

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

MD150
MD151
MD190
MD191

1

st

Edition

WORK SHOP

MANUAL

MD/2 series engines, p.no. 1-5302-602

2

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

FOREWORD

We have done all in our power to give up to date and accurate technical information in this manual. Ruggerini engines
are, however, constantly developing thus the data in this publication may be liable to modification without prior notice.

The information in this manual is the exclusive property of Ruggerini. Neither partial nor total duplications or reprints
are therefore permitted without the express authorization of Ruggerini.

The information in this manual is given on the assumption that:

1- The persons who service Ruggerini engines have been adequately trained and outfitted to safely and

professionally carry out the necessary tasks;

2- The persons who service Ruggerini engines possess the necessary skills and special Ruggerini tools to safely

and professionally carry out the necessary tasks;

3- The persons who service Ruggerini engines have read the specific information concerning the above mentioned

Service operations and that they have clearly understood the operations required.

GENERAL SERVICE NOTES

1 - Only use genuine Ruggerini spare parts. Use of spurious spares may lead to incorrect performance and shorten

the life of the engines.

2 - The metric system is used to express all data, i.e. the dimensions are given in millimeters (mm), torque is

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

3

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

WARRANTY CERTIFICATE

WARRANTY CERTIFICATE

Products Ruggerini Motori manufactured by Lombardini Srl are warranted to be free from non-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 above­mentioned 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 for Ruggerini Motori products is reported in the “World Service
Organisation” 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 the Ruggerini Motori authorized network will repair
and/or replace free of charge any own part or component that, upon examination by Ruggerini Motori Service Dept. or
by an authorized Ruggerini Motori 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 Srl warranty obligations here above described will be cancelled if:

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

- 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 the Manufacturer has been tampered with or removed.

- Spare parts used are not original from Manufacturer.

- 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
the Manufacturer.

- Engines have been disassembled, repaired or altered by any part other than an authorized Ruggerini Motori 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 non-conformity of the product must be addressed to the Ruggerini Motori service
agents.

4

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

INDEX

I TROUBLE SHOOTING __________________________________________________________ Page 7

II SAFETY AND WARNING DECALS - SAFETY INSTRUCTIONS ____________________________ " 8-9

III MODEL NUMBER AND IDENTIFICATION _____________________________________________ " 10

IV TECHNICAL DATA ______________________________________________________________ " 11

V CHARACTERISTICS _____________________________________________________________ " 12

VI OVERALL DIMENSIONS __________________________________________________________ " 13

VII SPECIAL TOOLS________________________________________________________________ " 14

VIII MAINTENANCE - RECOMMENDED OIL TYPE - REFILLING _______________________________ " 15-16

IX DISASSEMBLY OF THE ENGINE ___________________________________________________ " 17

Extracting crankcase bushes ......................................................................................................................................... 18

Extracting fuel injectors ................................................................................................................................................... 17

Extracting the oil pressure indicator plug ....................................................................................................................... 18

Extraction of crankshaft gear .......................................................................................................................................... 17

Extraction of flywheel side main bearing ........................................................................................................................ 17

Extraction of the camshaft gear ...................................................................................................................................... 18

Removing the flywheel .................................................................................................................................................... 17

X CHECKS AND OVERHAUL ______________________________________________________ Page 19

Camshaft ........................................................................................................................................................................ 24

Central main bearings .................................................................................................................................................... 24

Connecting rods ............................................................................................................................................................. 22

Crankshaft....................................................................................................................................................................... 23

Cylinders ......................................................................................................................................................................... 21

Cylinders heads .............................................................................................................................................................. 19

Fuel pump push-rod ....................................................................................................................................................... 25

Governor lever and spring .............................................................................................................................................. 26

Injection pump plug nuts and control rods..................................................................................................................... 25

Oil pump .......................................................................................................................................................................... 25

Oil seal rings ................................................................................................................................................................... 24

Piston rings - Pistons - Piston pins ................................................................................................................................ 22

Rocker arms ................................................................................................................................................................... 21

Tappets and push rods................................................................................................................................................... 25

Valves - Guides - Seats................................................................................................................................................... 19

Valves and springs ......................................................................................................................................................... 21

This manual contains pertinent information regarding the repair of RUGGERINI air-cooled, indirect injection Diesel engines
type MD150 - MD151, MD190 - MD191: updated June 23, 2003.

5

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

INDEX

XI INJECTION EQUIPMENT ________________________________________________________ Page 27

Assembly of injection pumps ......................................................................................................................................... 28

Checking and setting the injectors ................................................................................................................................. 29

Checking injection pumps .............................................................................................................................................. 27

Disassembly and re-assembly of injectors ................................................................................................................... 29

Fuel circuit ....................................................................................................................................................................... 27

Injection pump setting .................................................................................................................................................... 27

Injection pumps .............................................................................................................................................................. 27

Injectors........................................................................................................................................................................... 29

Testing air tightness ....................................................................................................................................................... 28

XII ELECTRICAL EQUIPMENT ______________________________________________________ Page 30

Checking electrical equipment ....................................................................................................................................... 30

Checking the alternator ................................................................................................................................................... 30

Plant specifications......................................................................................................................................................... 30

XIII ENGINE ASSEMBLY ___________________________________________________________ Page 31

Camshaft ........................................................................................................................................................................ 33

Central main bearings .................................................................................................................................................... 31

Checking injector protrusion .......................................................................................................................................... 36

Connecting rods ............................................................................................................................................................. 35

Crankshaft ....................................................................................................................................................................... 32

Crankshaft end float ........................................................................................................................................................ 32

Cylinder heads ................................................................................................................................................................ 36

Cylinders ......................................................................................................................................................................... 35

Electric shut off ................................................................................................................................................................ 38

Feed pump ...................................................................................................................................................................... 38

Governor tie rod adjustment ........................................................................................................................................... 33

Injection check ................................................................................................................................................................ 37

Injection pumps .............................................................................................................................................................. 36

Injectors and injector pipes ............................................................................................................................................ 38

Main bearings - flywheel side ......................................................................................................................................... 32

Oil filter ............................................................................................................................................................................ 38

Oil pump .......................................................................................................................................................................... 34

Pistons ............................................................................................................................................................................ 35

Preparing the crankcase ................................................................................................................................................ 31

Pulley and flywheel ......................................................................................................................................................... 34

Timing cover .................................................................................................................................................................... 34

Valve clearance ............................................................................................................................................................... 36

6

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

INDEX

XIV ENGINE TESTING _____________________________________________________________ Page 39

Checking for oil leaks ..................................................................................................................................................... 39

Checking oil pressure .................................................................................................................................................... 39

Dyno testing of engine .................................................................................................................................................... 39

Speed adjustment........................................................................................................................................................... 39

XV STORAGE ___________________________________________________________________ Page 41

How to prepare the engine for operation........................................................................................................................ 41

Permanent protection (over 6 months)........................................................................................................................... 41

Storage ............................................................................................................................................................................ 41

Temporary protection (1/6 months) ................................................................................................................................ 41

XVI QUICK REFERENCE CHARTS ____________________________________________________ Page 42

Adjustments .................................................................................................................................................................... 42

Couplings........................................................................................................................................................................ 42

Standard screw tightening torques................................................................................................................................. 43

Tightening torques .......................................................................................................................................................... 43

7

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

ITROUBLE SHOOTING

Clogged pipes
Clogged fuel filter
Air inside fuel circuit
Clogged tank breather hole
Faulty fuel pump
Injector jammed
Jammed injection pump delivery valve
Wrong injector setting
Excessive plunger blow-by
Jammed injection pump delivery control
Wrong injection pump setting
Oil level too high
Jammed pressure relief valve
Worn oil pump
Air inside oil suction pipe
Faulty pressure gauge or switch
Clogged oil suction pipe
Battery discharged
Wrong or inefficient cable connection
Defective ignition switch
Defective starter motor
Clogged air filter
Excessive idle operation
Incomplete running-in
Engine overloaded
Advanced injection
Delayed injection
Incorrect governor linkage adjustment
Broken or loose governor spring
Idle speed too low
Worn or jammed piston rings
Worn or scored cylinders
Worn valve guides
Jammed valves
Worn bearings
Governor linkage not free to slide
Drive shaft not free to slide
Damaged cylinder head gasket

TROUBLE

LUBRICATION

POSSIBLE CAUSE

FUEL CIRCUIT

ELECTRIC

SYSTEM

MAINTE-

NANCE

SETTINGS/REPAIRS

POSSIBLE CAUSES AND TROUBLE SHOOTING

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.

Engine does not

start

No acceleration

Black smoke

Excessive oil

consumption

Too low oil

pressure

Engine starts but

stops

Non-uniform speed

White smoke

Oil and fuel

dripping from

exhaust

Increase oil level

8

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

II SAFETY AND WARNING DECALS - SAFETY INSTRUCTIONS

Failure to comply with the
instructions could result in
damage to persons and
property

Failure to comply with the
instructions could lead to
technical damage to the
machine and/or system

SAFETY AND WARNING DECALS

SAFETY INSTRUCTIONS

DANGER CAUTION

• Ruggerini 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 Ruggerini 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 Ruggerini
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 Ruggerini 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 self­winding 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.

9

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

IISAFETY AND WARNING DECALS - SAFETY INSTRUCTIONS

• 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.

• 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.

• Make sure that the drained oil, the oil filter and the oil it contains are disposed of in the correct way in order to
safeguard the environment.

• 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 Ruggerini 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.

10

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

III MODEL NUMBER AND IDENTIFICATION

ENGINE IDENTIFICATION

Engine Serial Number
Approval code
Customer's code
R.P.M. setting
R.P.M.
Displacement (cc)

MODEL NUMBER

Model

11

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

IV

N.
mm
mm

cm³

Nm
g/kW.h
g/kW.h

lt

Ah -A

kg
m³/h
m³/h

kg.

N 80/1269/CEE-ISO 1585

NB ISO 3046 - 1 IFN

NA ISO 3046 - 1 ICXN

2
80
65

654

19:1

—

12(16,3)

—

11,2(15,2)

—

10,3(14)

32@2400

246

0,8
1,8

66-300

50
62

700

100(300)

25°(30°)
25°(35°)
25°(40°)

2
85
75

851

19:1

—

14(19)

—

13(17,7)

—

12(16,5)

40,5@2400

246

0,8
1,8

66-300

53
80

850

100(300)

25°(30°)
25°(35°)
25°(40°)

MD151 MD191

2
80
65

654

19:1

10(13,6)

—

9,3(12,6)

—

8,6(11,7)

—

32@2400

246

0,8
1,8

66-300

50
50

600

100(300)

25°(30°)
25°(35°)
25°(40°)

2
85
75

851

19:1

12,5(17)

—

11,4(15,5)

—

10,5(14,3)

—

40,5@2400

246

0,8
1,8

66-300

53
75

750

100(300)

25°(30°)
25°(35°)
25°(40°)

MD150 MD190

TECHNICAL DATA

* Referred to N power
** Consumption at max torque

CHARACTERISTICS

ENGINE TYPE

Number of cylinders
Bore
Stroke
Swept volume
Compression ratio

@ 3000 RPM
@ 3600 RPM
@ 3000 RPM
@ 3600 RPM
@ 3000 RPM

@ 3600 RPM
Max. torque *
Fuel consumption **
Oil consumption
Capacity of standard oil sump
Recommended battery 12V
Dry weight
Combustion air volume
Cooling air volume
Max.permissible driving shaft axial: continuous (instantaneous)

Flywheel site: continuous (instantaneous)

Max. inclination Power take off site: continuous (instantaneous)

Lateral: continuous (instantaneous)

Power kW (HP)

12

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

V

MD150 - MD151

MD190 - MD191

CHARACTERISTICS

CHARACTERISTICS POWER, TORQUE AND SPECIFIC FUEL CONSUMPTION CURVES

N (80/1269/EEC - ISO 1585) AUTOMOTIVE RATING : Intermittent operation with variable speed and variable load.
NB (ISO 3046 - 1 IFN) RATING WITH NO OWERLOAD CAPABILITY: continuos ligth duty operation with constant speed and variable load.
NA (ISO 3046 - 1 ICXN) CONTINUOS RATING WITH OVERLOAD CAPABILITY: continuos heavy duty with constant speed and constant load.
Mt-N Torque at N power.
C Specific fuel consumption at N power.
U1: Standard utilization range of engines rated at 3000 rpm
U2: Standard utilization range of engines rated at 3600 rpm

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 RUGGERINI for power, torque curves and specific consumptions at rates differing from those given above.

13

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

VI

MD150/151
MD190/191

MD150/151
MD190/191

OVERALL DIMENSIONS

Note: Dimensions in mm

14

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

VII

00365R0020

00365R0010

00365R0900

00365R0890

00365R0910

00365R0930

00365R0770

00365R0940

00365R0430

Flywheel puller

Universal puller

Main bearing extractor

Gear extractor

Central bearing assembly tool

Valve guide rubber fitting tool

Cylinder collar Ø 80/85 mm

Injection advance control tool

Injector test bench

SPECIAL TOOLS

TOOL CODE DESCRIPTION

15

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

VIII

(*)
(*)

(**)

(**)(***)

(x)

(xx)

8 50 200 300 400 2500 5000

MAINTENANCE - RECOMMENDED OIL TYPE - REFILLING

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

First replacement
(*) Under severe working conditions, clean daily.
(**) Under extremely dusty conditions, change every 4-5 hours.
(***) See recommended oil type.
(x) The partial overhaul includes the following operations: valve and seat lapping, injector and injection pump overhaul,

injector projection check, fuel injection spark advance check, check of the harmful area between head and piston,

camshaft and crankshaft end float check, tightening of bolts.
(xx) The general overhaul includes - in addition to all partial overhaul - the following procedures: cylinder and piston

replacement, seat, guide and valve refacing, crankshaft replacement or grinding, bench bearing and connecting rod

replacement.

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.

FUEL

When refuelling, it is advisable to use a funnel to prevent fuel from spilling out. The fuel should also be filtered to prevent dust
or dirt from entering the tank.
Use the same type of diesel fuel as used in cars. Use of other types of fuel could damage the engine. The cetane rating of
the fuel must be higher than 45 to prevent difficult starting. Do not use dirty diesel fuel or mixtures of diesel fuel and water
since this would cause serious engine faults.

The capacity of the standard tank is: lt. 4,0

The maintenance operations listed above refer to an engine operating in normal conditions (temperature, degree of humidity,
dust in the working environment). They may vary significantly according to the type of use.

INTERVAL (HOURS)

COMPONENT

OPERATION

MANUTENANCE

CLEANING

CHECK

OVERALL

INSPECTION

REPLACEMENT

OIL-BATH AIR CLEANER
HEAD AND CYLINDER FINS
INTERNAL OIL FILTER
FUEL TANK
INJECTOR

AIR CLEANER OIL

LEVEL OIL SUMP

BATTERY FLUID
VALVE/ROCKER ARM CLEARANCE
INJECTOR SETTING

AIR CLEANER

SUMP
INTERNAL OIL FILTER CARTRIDGE
EXTERNAL OIL FILTER CARTRIDGE
FUEL FILTER CARTRIDGE
DRY AIR CLEANER CARTRIDGE
PARTIAL
COMPLETE

OIL

16

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

VIII

-30-25­20

-15-10­5

0+5+10+15+20

+25+30+

35

+40+

45

SAE 20W

SAE 10W

+

50

SAE 30

SAE 40

SAE 10W-30

SAE 10W-40

SAE 10W-60

SAE 15W-40 base minerale

SAE 15W-40 base semi-sintetica

SAE 20W-60 base semi-sintetica

SAE 5W-30 base sintetica

SAE 0W-30 base sintetica

SAE 5W-40 base sintetica

-35-

40

CCMC G- 2

CF CE CD CC CB CA SA S B SC SD SE SF S G

DIESEL

BENZINA - ESSENCE - PETROL

BENZIN - GASOLINA

CCMC G- 3

G- 5

CCMC PD - 1 / PD - 2

CCMC D- 2

D- 4

CCMC D- 3

D- 5

MIL - L - 2104 D

MIL - L - 2104 E

MIL - L -46152 C

MIL - L- 46152 D/E

MB 226.1 MB 226.5

MB 227.1

MB 227.5

228.3 MB 228.1

VW 501.01

VW 500.00

SHAPI

G- 4

SJ

VOLVO VDS

MAN QC 13-017

VW 505.00

MAINTENANCE - RECOMMENDED OIL TYPE - REFILLING

The engine could be damaged if allowed to operate with insufficient oil. It is also dangerous to add too much oil as
its combustion could sharply increase the rotation speed.
Use a suitable oil in order to protect the engine.
The lubrication oil influences the performances and life of the engine in an incredible way.
The risk of piston seizure, jammed piston rings and rapid wear of the cylinder liner, the bearings and all moving
parts increases if oil whose characteristics differ from the recommended type is used, or if the oil is not regularly
changed. All this notably reduces engine life.
Oil viscosity must suit the ambient temperature in which the engine operates.

Old oil can cause skin cancer if repeatedly left in contact with the skin and for long periods of time. If contact with the
oil is inevitable, you are advised to thoroughly wash your hands with soap and water as soon as possible.
Appropriate protective gloves etc should be wore during this operation.
Old oil is highly polluting and must be disposed of in the correct way. Do not litter.

GRADERECOMMENDED OIL

AGIP SINT 2000 5W40 specification API SJ/CF ACEA A3-96 B3­96 MIL-L-46152 D/E.
ESSO ULTRA 10W40 specification API SJ/CF ACEA A3-96 MIL-L­46152 D/E.
In countries where AGIP and ESSO products are not available,
use API SJ/CF oil for gasoline-fuelled engines or oil that
complies with military specification MIL-L-46152 D/E.

OIL SUPPLY ( liters )
Standard oil sump

filter included 1,8 l.

ACEA SEQUENCES

A = Gasoline (Petrol)
B = Light Diesel fuels
E = Heavy Diesel fuels

Required levels :

A1-96
A2-96
A3-96

B1-96
B2-96
B3-96

E1-96
E2-96
E3-96

17

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

IX

1

3

2

4

DISASSEMBLY OF THE ENGINE

During repair operations, when
using compressed air, wear eye

protection.

Extracting fuel injectors

Unscrew the fuel feeding pipes.
Remove the injectors using a commercial extractor tool as shown in
fig. 1.

Removing the flywheel

Use the extractor number 00365R0020 as shown in figure 2.

During the demounting phases, pay particular attention to
prevent the flywheel from dropping as this could seriously
injure the operator.
Wear protective goggles when removing the flywheel ring.

IMPORTANT: Do not tap the end of the extractor when
removing the flywheel.

Extraction of flywheel side main bearing

Withdraw the bearing using two M8 screws taking care to tighten
them evenly; alternatively use a commercial extractor, as shown in
figure 3.

Extraction of crankshaft gear

Use extractor tool number 00365R0890 (fig.4).

DISASSEMBLY AND REASSEMBLY

Besides disassembly and reassembly operations this chapter also
includes checking and setting specifications, dimensions, repair
and operating instructions. Always use original RUGGERINI spare
parts for repair operations.

18

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

5

IX

6

7

8

DISASSEMBLY OF THE ENGINE

Extraction of the camshaft gear

Use the extractor number 00365R0010 (fig.5).

Extracting crankcase bushes

From crankcase (fig.6)
From main bearing (fig.7)
Use extractor number 00365R0900.

Extracting the oil pressure indicator plug

Loosen the plug securing screw, and remove circlip, spring and
ball.
Cut a thread on the inside of the plug body and then withdraw it
using a commercial extractor tool (fig. 8).

19

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

X

9

10

11

c mm

13,025÷13,037

a mm

6,960÷6,970

6,945÷6,955

b mm

7,00÷7,01

e mm

13÷13,01

d mm

0,8÷1,0

CHECKS AND OVERHAUL

Guide

Inlet

Exhaust

assembly

Cylinders heads

Parts shown in figure 9.

1.Head - 2.Tappets - 3.Valves - 4.Seats - 5.Guides - 6.Seals -

7.Lower washers - 8.Springs - 9.Top washers - 10.Valve locking
split cones - 11.Rocker arms - 12.Rocker pins - 13.Gaskets -

14.Push rods - 15.Cover tube - 16.O-ring - 17.Camshaft.
The heads are made off aluminium with valve guides and seats are
made of cast iron.

Do not disassemble the head when the engine is hot to
avoid deformation.

Clean heads of carbon deposits and check the cylinder mating
surfaces; if they are deformed they must be ground to a maximum
of 0.3 mm. Check that there are no cracks or other imperfections in
the heads. If defects are encountered the heads must be renewed.
In this case consult the spare parts catalogue.

Valves - Guides - Seats

Clean the valves with a wire brush and renew them if the valve
heads are deformed, cracked or worn.

Check the dimensional conformity of the valve stems (fig. 11) and
the clearance between valve and guide, bore out the guides to the
dimensions indicated in the table (fig. 10).
Renew both guide and valve if the clearance is greater than 0.1mm.

It is always necessary to grind the valve seats when new guides are
fitted.
Oversize valve guides with external diameter increased by 0.10 are
available.

20

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

X

12

13

14

15

d= 0,8 ÷1,0 d=1,3

CHECKS AND OVERHAUL

After prolonged running of the engine the hammering of the valves
on their seats at high temperature tends to harden the faces of the
seats and makes manual grinding difficult. It is necessary to
remove the hardened surface with a 45° cutter (fig. 12).

Grinding of valve seats causes a widening of the valve seat face P
(fig.13).
Final lapping of the valve on the seat must be carried out by coating
the seat with a fine lapping compound and rotating the valve in a
clockwise and counterclockwise direction with slight pressure until
a perfect surface finish is obtained (fig.14).

Observe the valve seating clearances indicated in the following
table (fig.10).

Fitting mm Max. wear mm

In the case of lower values the valve may strike the piston.
In the case of values in excess of 1.3 mm the valve seat
rings must be replaced.

Fitting of new seats or valves always requires preparatory grinding.
Valves are available with the external diameter increased by

0.5 mm.

After grinding wash the valve and seat carefully with petrol or
paraffin in order to remove residual grinding paste and chips. Once
you have finished grinding check the efficiency of the seal between
the valve and seat as outlined below:

1.Fit the valve on the head with spring, washers and split cones
(fig.9).

2.Invert the head and pour in a few drops of diesel fuel or oil
around the edges of the valve head.

3.Blow compressed air into the inlet of the cylinder head taking
care to seal the edges so that the air does not escape (fig.15).

Should air bubbles form between the seat and the valve remove the
valve and regrind the seat.

21

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

16

X

17

18

19

0,03 ÷ 0,06 0,15

0,05 ÷ 0,130 0,5

Ø 80 ÷ 80,020
Ø 85 ÷ 85,015

MD150 MD151
MD190 MD191

CHECKS AND OVERHAUL

Valves and springs

In order to check the springs for possible failure measure the
lengths under load as shown in figure 16.
The permissible tolerance for loads and lengths is ± 10%. If the
figures measured do not fall within these values, the springs must
be renewed.

Rocker arms

Make sure that the facing surfaces between rocker and pin are not
scored and show no signs of seizure. If such marks are
encountered, renew rocker and pin. Rocker / pin clearance (fig.17):

Make sure that the rocker arm adjusting screw is not worn and that
the lubrication hole is free of dirt.

Cylinders

Air cooled with cylinder barrels in special cast iron with integral
liners.

Use a dial gauge to check internal diameters (C-D) at three different
heights (fig.18).
Maximum permitted taper (A-B) and ovality (C-D) is 0.06mm.

Diameter of cylinders (fig.18):

If the diameter of the cylinder does not exceed said values or if there
are slight surface scores on the cylinder, it will be sufficient to
change the piston rings.

Do not manually hone the cylinder bore surfaces with
emery cloth or other means.

The cross-hatch pattern should be at an angle of 90°÷120°; lines
should be uniform and clear in both directions.
Average roughness must range between 0.5 mm 1 µm.
The cylinder surface which comes into contact with piston rings
should be machined with the plateau method.

If the taper and ovality of the cylinder exceed the values indicated,
then the cylinder and piston must be renewed.

Diameter of cylinders (fig.22):

Fitting mm Max. wear mm

Rocker axial play (fig.17):

Fitting mm Max. wear mm

22

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

X

20

21

22

23

0,30 ÷ 0,50

0,25 ÷ 0,50

0,80

0,80

A = 0,22

B = 0,18

C = 0,16

0,003 ÷ 0,013 0,050

79,93 ÷ 79,958

84,910 ÷ 84,940

19,997 ÷ 20,002

21,997 ÷ 22,002

0,023 ÷ 0,038

0,023 ÷ 0,038

0,070

0,070

MD150 MD151

MD190 MD191

MD150 MD151

MD190 MD191

CHECKS AND OVERHAUL

Piston rings - Pistons - Piston pins

Check the wear of piston rings by fitting them into the cylinder
through the lower end and measuring the end gap (fig.20). The
values should be:

Check that the rings move freely in the grooves and check the ring/
groove clearance using a feeler gauge (fig.21).
If the clearance exceeds the values shown in the table, renew the
piston and the piston rings.

Piston rings must always be renewed after dismantling
the piston.

Piston diameter check: The diameter of the piston must be
measured at approximately 18 mm from the base (fig.22).

Fitting mm Max. wear mm

Piston ring

1st Compression

2nd Compression

3rd Oil scrapper

Max. wear mm

Engine

Diameter mm

Check the clearance between cylinder and piston, if it is greater
than 0.120 mm both cylinder and piston must be replaced.
Assembly clearance between piston pin and piston in millimetres:

Fitting mm Max. wear mm

Connecting rods

The connection between the connecting rod small end and the wrist
pin is without a bushing. Assembly clearance between connecting
rod small end and piston pin in millimetres:

Checking parallelism between the two axes of the connecting rod
(fig.23):

1.Fit the wrist pin in the hole in the small end of the connecting
rod and fit a calibrated pin into the big end (with bush fitted).

Engine

Ø Piston pin

mm

Assy.clearancemmMax wear

mm

Piston ring

Compression

Oil scrapper

23

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

X

24

25

26

27

-0,50 mm

44,505

÷

44,515

39,494

÷

39,510

-0,75 mm

44,255

÷

44,265

39,244

÷

39,260

-0,25 mm

44,755

÷

44,765

39,744

÷

39,760

STD mm

45,005

÷

45,015

39,994

÷

40,010

A - B - D

C

CHECKS AND OVERHAUL

2.Position the calibrated pin on two prisms arranged on a check
surface.

3.Use a dial gauge to check that the discrepancy between
readings at the ends of the calibrated pin is no more than 0.05
mm; should deformation exceed this value (max. 0.10mm) the
connecting rod must be straightened.
This operation is performed by placing the connecting rod on a
parallel surface and applying slight pressure mid-way along the
convex side of the stem (fig.24).

Undersize bearing bushes are already available at the necessary
sizes without requiring any adjustment by boring.

Dimensions

Crankshaft

Whenever the engine is dismantled, particularly for the replacement
of cylinders and pistons due to wear caused by the aspiration of
dust, it is good practice to check the condition of the crankshaft.

1.Remove the plugs “A” from the oil passages (fig.25).

2.Use an appropriately shaped steel punch to clean the inside of
the oil passages and the collection traps. If the deposits are
particularly resistant, immerse the whole crankshaft in petrol or
paraffin before proceeding with the operations.

3.When the oil passages and traps have been throughly cleaned,
close the openings with new plugs (fig.26).

Checking crankshaft dimensions

Once the crankshaft has been thoroughly cleaned, use a
micrometer to check the wear and ovality of the main journals and
crank journals across two sections at right angles to each other
(fig.27).

If wear exceeds 0.08 mm (fig.28) grind the crankshaft to the
dimensions shown in the table:

24

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

X

28

29

30

31

A B

C

D

34,69 ÷ 34,74

34,98 ÷ 35,02

25,50 ÷ 25,70

0,025 ÷ 0,065

0,07 ÷ 0,105

0,04 ÷ 0,075

CHECKS AND OVERHAUL

During grinding take care not to remove the shim
adjustment material from the main journal thrust face to
avoid changing the crankshaft end float; also ensure that
the grinding wheel radii are as specified in figure 28 so as
not to create crack initiation sections on the crankshaft.

Assembly clearance between the journals and their housings
should be (fig.31):

Renew the camshaft if the cams or journals show wear in
excess of 0.1mm.

Measurement Dimensions mmCam

Timing

Injection

Fuel pump

Measurement

E

F aluminium crankcase

F cast iron crankcase

Clearance mm

Oil seal rings

Check that the rings have not hardened around the internal contact
edge and that they show no signs of cracks or wear.

Camshaft

Check the cams and bearing journals for scoring and wear.
Measure the dimensions and compare them to the values in the
table below and shown if figures 30-31.

Camshaft dimensions fig.30.

inlet/exhaust injection feeding pump

Central main bearings

In order to facilitate assembly the central main bearings are of
different external diameters (fig.29) and are machined with a
bevelled edge to assist their insertion into the crankcase.
Check the dimensions of the shells and renew them if they are
worn or deformed.
Also check the condition of the oil passages (MD190) and, if
necessary, clean them with paraffin or petrol and dry with
compressed air.

25

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

X

32

33

34

35

Ø 11,977 - 11,993

Ø 27,959 - 27,980 Ø 18,9 - 19,0

3,45 - 3,55

Ø 9,986 - 9,996

38,9 - 39,1

0,07 ÷ 0,041

0,10

0,02 ÷ 0,059

0,10

0,05 ÷ 0,098

0,120

A

B

C

29,72 ÷ 29,77

40,551 ÷ 40,576

17,92 ÷ 17,94

29,65

40,45

17,89

MD150-151 161,6 - 162,2

MD190-191 180,1- 180,7

CHECKS AND OVERHAUL

Tappets and push rods

Make sure that the tappet surfaces (fig.32) are free from wear and
present no signs of scoring or seizure, otherwise, renew.
Assembly clearance between tappets and their housings should
be:

The push rods must be straight and with the spherical surfaces at
either end in good condition (fig.32).
Make sure that the lubrication holes inside the tappets and push
rods are free of dirt.

Injection pump plug nuts and control rods

Renew the parts if the surface wear is greater than 0.10mm
(fig.33).

Assembly clearance between control rods and their housings in the
crankcase:

Fuel pump push-rod

Check that the surfaces of the fuel pump push-rod, fig. 34, are free
of wear, scoring, or signs of seizure, otherwise, renew.
Assembly clearance between fuel pump push-rod and its housing
in the crankcase:

Oil pump

Check the rotors and renew them if they have worn lobes or centres.
Check the extent of pump wear by taking the measurements
indicated in figure 35.

Fitting mm Max. wear mm

Fitting mm Max. wear mm

Fitting mm Max. wear mm

Max. wear mmMeasurement Dimensions mm

26

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

X

36

37

0,27 ÷ 0,47

0,60

0,01 ÷ 0,06

0,10

14,75

25,5

1,9

0,6

53

38,7

32 ÷ 34

25,75

÷ 26,25

The clearance between the external rotor of the oil pump and the
cover facing surface must be:

End float of rotors (fig.36):

Governor lever and spring

Check that the shoes (S, fig.37) are level and that the springs have
not lost their elasticity. Renew any excessively worn parts after
consulting the spare parts catalogue.

Supplement and governor spring dimensions (fig.37):

Load

kg

Nr of

windings

Lenght under

load mm

Lenght

mm

Governor (N)

Supplement (H)

Spring

Fitting mm Max. wear mm

Fitting mm Max. wear mm

CHECKS AND OVERHAUL

27

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XI

38

41

40

39

23 ÷ 25 cc 20 ÷ 22 cc (BOSCH)

INJECTION EQUIPMENT

Fuel circuit

Fuel feeding can be either gravity type or forced, with a mechanical
double diaphragm pump operated a cam located on the camshaft.
Fuel is filtered by a filter in the fuel tank or through an external filter
cartridge.
The fuel circuit is bled of air automatically.

Components of figure 38:

1. Fuel tank - 2. Fuel filter - 3. Fuel supply lines - 4. Fuel injection
pumps - 5. Bleed off connection - 6. Fuel injectors - 7. Injection lines

- 8. Fuel return lines - 9. Fuel sully pump.

Injection pumps

Components of figure 39:

1. Delivery connection - 2. O-ring - 3. Filler - 4. Washer - 5. Valve
spring - 6. Delivery valve - 7. Injection plunger - 8. Lower plate - 9.
Spring - 10. Top plate - 11. Retaining ring - 12. Adjustment sleeve -

13. Pump body - 14. Sleeve securing pin - 15. Distance ring - 16.
Eccentric pin - 17. Cap - 18. Clip for BOSCH pump type PF30.

Checking injection pumps

Before dismantling the injection pumps check for pressure leak of
the pumping unit, plunger and valve, as follows:

1.Connect a pressure gauge with 600 Kg/cm² full scale to the
diesel delivery line (fig.40).

2.Set the control sleeve (nr. 12, fig.39) to a mid-point delivery
position.

3.Turn the flywheel slowly until the plunger has completed a full
compression stroke.

4.Take the pressure gauge reading. If it is below 300 Kg/cm² the
complete plunger unit must be changed.

During the test the reading on the gauge will show a progressive
pressure increase to a maximum value and then will fall suddenly
and stop at a lower pressure. Replace the valve if the fall in
pressure exceeds 50 Kg/cm² and continues to fall slowly.
The pressure drop from 200 Kg/cm² to 150 Kg/cm² must occur in a
time interval of no less than 7 seconds.

Injection pump setting (fig.41)

Set the maximum quantity delivered by the pump by turning the
eccentric pin using a screwdriver (nr. 16, fig.39).
With the control sleeve at 10mm from the stop position and the
pump running at 1,500 rpm, the quantity of fuel for 1,000 shots must
be between:

28

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XI

42

43

44

45

INJECTION EQUIPMENT

The difference between the deliveries of the two pumps
when locked must not exceed 0.5 cc.

Also check:

1.That the distance between the injection cams in the rest
position (bottom dead centre) and the pump supporting face is
between 52.8 and 54.4 mm as shown on the data plate;

2.That the stroke of the piston with injection cams in the rest
position (bottom dead centre), to the start of delivery is between

2 and 2.1 mm.

Assembly of injection pumps

If it proves necessary to disassemble the injection pumps they
must be reassembled following the instructions listed below:

1.Insert barrel into pump casing with the fuel inlet hole aligned
with the feeding connection (fig.42). This is the only possible
position because of the stud on the pump body. Make sure that
the seating face between the barrel and the pump are free of
dirt.

2.Insert delivery valve, copper gasket, spring, washer, filler, O­ring, and temporarily tighten the delivery connection.

3.Insert plunger, with helical profile (A, fig.43) on the opposite
side of the sleeve pin (B, fig.43), into the internal groove of the
control sleeve (make sure the helical profile is turned towards
the fuel inlet and eccentric pin (C, fig.43).

4.Complete pump assembly with plunger (a, fig.44), control
sleeve (b), upper washer (c), retaining ring (d), spring (f) and
secure all with the spring holder washer (g)

5.Tighten delivery valve holder (h, fig.44) to 4.5 ÷ 5 kgm torque.

6.Check, by compressing the spring through its various work
positions, that the control sleeve (b, fig.44) turns freely and
does not stick or encounter resistance throughout its full stroke;
any irregular movement will give rise to hunting of engine
speeds.

7.Secure the control sleeve using the pin (n, fig.44) screwed into
pump housing.

Always check the injection pump calibration after the
delivery connection (h, fig.44) has been dismantled.

Testing air tightness

Feed pressurized air at 6 Kg/cm² into the fuel sullpy union and
completely immerse the pump in oil or diesel fuel for about 20 ÷ 30
seconds (fig.45); check that no air bubbles are released.

N.B.: Tightness can be checked by compressing the springs to

52.8 ÷ 54.4 mm, which corresponds to the bottom dead centre
working position of the pump.

29

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

46

47

48

49

XI

kgm 3,5 (Nm 34,3)

INJECTION EQUIPMENT

Injectors

Details of fig.46:

1.Injector casing - 2.Adjusting shim - 3.Spring - 4.Rod - 5.Distance
ring with locating pin - 6.Nozzle - 7.Ring nut

Checking and setting the injectors

1.Clean the nozzle holes with 0.25mm gauge steel wire (fig.47).

2.Place the injector on the test bench (p.n. 00365R0430, fig.48)
bypass the pressure gauge and operate the lever rapidly. The
nozzle should chatter audibly and spray correctly.

3.Connect the pressure gauge while pressing the lever slowly
and steadily until injection occurs.
The opening pressure registered on the gauge should be 230
Kg/cm² (200 Kg/cm² on silenced versions).
Change the adjusting shims (nr. 2, fig. 46) in order to achieve
correct adjustment.

4.Testing fortightness: Operate test bench hand lever until the
pressure gauge reads 20 Kg/cm² below the opening pressure
of the needle valve. The nozzle can be considered well sealed if
there no Diesel fuel accumulates at the nozzle tip after 10
seconds.

Disassembly and re-assembly of injectors

Unscrew the ring nut on the injector nozzle using a ring wrench and
a special tool as illustrated in figure 49 serving to release the
pressure exerted by the spring on the ring nut.

1.Visual check: make sure that the seat of the needle shows no
signs of hammering or excess roughness, that the needle is
not worn or damaged, and that the holes are free of carbon
deposits.

2.Smoothness test: the needle, previously immersed in diesel
and inserted into the nozzle casing, must be pulled out to a third
of the length of the guide while holding the nozzle in a vertical
position. When the needle is released it should return freely to
its seat by the effect of its own weight.

Reassemble the injector following the assembly order shown in
figure 46; during reassembly make sure that the locating elements
on distance ring 5 (fig.46) are correctly inserted to the
corresponding holes. Torque the nozzle securing ring nut to:

30

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XII

51

52

53

54

50

ELECTRICAL EQUIPMENT

Cables color (fig. 50-51)

M Brown
N Black
A White
V Green
R Red

Description (fig. 50-51)

1. Ignition key (optional)

2. Voltage regulator

3. Engine starter

4. Battery (not included)

5. Alternator

6. Pressure switch

7. Battery recharge warning light (optional)

8. Oil pressure warning light (optional)

Checking electrical equipment

1.Make sure that the connections between the voltage regulator
and alternator are correctly made and in good condition.

2.Disconnect the starter motor wire from the battery terminal and
connect a dc ammeter (fig.50 and 51).

3.Connect a dc voltmeter to the battery terminals (fig.50 and 51).

4.Turn over the engine a few times without load or connect an
80÷100W lamp load across the battery to restrict voltage to
lower than 13V.

5.Accelerate the engine to 3000 rpm. The current shown by the
ammeter must be in line with the values indicated in figure 52.

6.Disconnect the load from the battery (if it was previously
connected) and keep the engine running at the above indicated
speed for a few minutes, the battery voltage should slowly
increase until it reaches approximately 14.2V. At the same time
the charge current should drop to around 2A in a period of time
that depends on the whether the battery is fully charged or not.

7.If the charging current is absent or is lower than the value
indicated above, proceed by checking the alternator and if
necessary, renewing the voltage regulator.

Checking the alternator

Check:

1.with motor stopped: the continuity of the windings (fig.53) by
connecting an ohmmeter and ensuring that resistance is zero,
and the insulation between the windings and ground (fig. 54) by
ensuring that the ohmmeter gives a reading of infinite
resistance. If these readings are not obtained the stator must
be renewed.

2.with motor running: use a multitester to check the charge
current between the two yellow wires. Bring the engine up to
3000 rpm - the multitester should give a reading of 35V.
If the values are more than 10V below this value, the rotor is de­magnetized and the alternator must be renewed.

Important:

1.The alternator will not deliver current when the yellow wires are
disconnected.

2.The alternator will burn out if the yellow wires are connected to
ground.

3.The voltage regulator may be damaged if the ground
connection or other circuit connections are not made properly.

4.The alternator and the voltage regulator will burn out instantly if
the battery connections are inverted.

Internal built-in alternator

External alternator

cables: Color

x Section (mm²)

cables: Color

x Section (mm²)

Plant specifications
Starter motor: Left rotation, 12V, power from 1.25 to 1.4 kW
Built-in alternator: 280W
Voltage regulator: Electronic with controlled diodes and connection

for battery charge indicator light

External alternator: 12V - 400W
Recommended battery: Refer to tables in chapters 4
Flywheel ring gear: Check teeth for wear or damage. Fit crown

wheel to flywheel by pre-heating to 200-250°C.

31

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XIII

55

56

57

58 59

kgm 2,2 (Nm 21,6)

ENGINE ASSEMBLY

Notice: These instructions are valid for engines up-dated
prior to the publication of this manual. Any modifications
must be checked on the technical circulars.
Before assembling the engine carefully clean all parts
and dry them with compressed air. Lubricate moving parts
to prevent seizing when starting up. Replace the gaskets
with new ones each time the engine is assembled.
Use torque wrenches to ensure that the correct tightening
torques are applied.

Preparing the crankcase

Clean the mating surfaces of sealing compound residues or other
foreign material using a copper scraper or fine emery stone. Make
sure that the oil passages are open and free of built-up deposits.

1.Fit the plugs (A, fig.55) in their holes.

2.Insert the internal accelerator lever (B, fig.55) into the crankcase
with its spring taking care to protect the oil seal O-ring from
damage.
Complete the external assembly with plate, spring, lever, etc. as
shown in figure 55.

3.Mount the bearing bush (gear train side) using either a
standard press or a made-to-measure punch as shown in
figure 56. Fit the bush by matching the hole with the passage on
the crankcase. Bushes with standard or smaller internal
diameters can be ordered as required.

4.Insert the complete oil pressure relief valve (A, fig. 57) into its
housing (C, fig.57). Make sure that the valve ball seat is free of
dirt that could reduce the effectiveness of the pressure seal.
Secure the oil pressure valve with the relative screw (B, fig. 57).

5.Insert the cylinder studs and the centring pins.

Central main bearings

Fit the shells into their seats and coat with a thin film of oil.
The reference numbers (fig.58) must be aligned on each half-shell,
making sure that the oil passages match the corresponding
openings in the crankcase. Torque the bearing assembly bolts (fig.

59) to:

A warped oil retainer may allow the introduction of air into
the engine thus causing crankcase ventilation problems.
Use genuine oil retainers with the RUGGERINI.

32

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XIII

60

61

64

65

62

63

kgm 2,2 (Nm 21,6)

kgm 2,2 ÷ 2,4 (Nm 21,6 ÷ 23,5)

0,10 ÷ 0,20 mm

0,20 ÷ 0,30 mm (cast iron crankcase)

Crankshaft

Fit the crankshaft into the crankcase using tool p.n. 00365R0910
as shown in figure 60; make sure that the bearing oil passages are
matched to the crankcase oil passages.

Torque the bearing screws (fig. 61) to :

Main bearings - flywheel side

Fit the bush to the bearing carriern using a special tool of
appropriate diameter as shown in figure 62. Insert the bush
arranging the groove so that it is facing the internal side of the
bearing and positioned vertically.
Fit the oil seal ring to the bearing using a suitable diameter tubular
punch.
Fit the bearing into the crankcase after having first interposed an O­ring between the contact surfaces (fig. 63). Torque the screws to:

Crankshaft end float

Install an 0.15 mm feeler gauge betwen the crankshaft shoulder
and the crankcase (flywheel side).
Use a screwdriver to force the crankshaft against its shoulder as
shown in figure 64. Pre-heat the timing gear to a temperature of
180 ÷ 200 °C and fit it onto the crankshaft pressing it down until it
comes into contact with the crankcase. Wait until the timing gear
has cooled down and then withdraw the feeler gauge and the
screwdriver and check end float (fig. 65), which must be within the
range:

ENGINE ASSEMBLY

33

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XIII

66

67

68

69

mm 36,5 ± 1

ENGINE ASSEMBLY

Camshaft

Prepare the camshaft assembly (fig.66) as described below:

1.Fit adjustment shim (nr. 3) and governor washer (nr. 4) onto the
camshaft.

2.Fit snap ring (nr. 5) and key (nr. 7) into their respective seats.

3.Preheat (180 ÷ 200 °C) gear (nr. 6) complete with flyweights
and mount it to the camshaft, making sure that it is snugly fitted
against the retaining ring.

4.Insert the governor driving plate retaining ring (nr. 2).

The speed governor is of the centrifugal type with flyweights keyed
directly onto the end of the camshaft gear (fig.67).
Flyweights (A) impelled outward by centrifugal force, cause a
moving plate (P) to shift axially. The plate operates a lever (R) which
is connected, through tie rods (T) to the control sleeves (E) of the
injection pumps.
Spring (N) placed under tension by speed control lever (C),
contrasts the action of the centrifugal force of the governor.
The balance between the two forces keeps the engine speed
virtually constant with respect to load variations.

Governor tie rod adjustment

The length of the tie rod, measured between the centredistance of
holes (X, fig. 67), must be:

The accuracy of this setting will serve to eliminate hunting
of engine speed, difficulty in starting, and power fall-off.

turn

Assembly

1.Fit the tappets into their housings in the crankcase

2.Fit the governor lever and tie rod, simultaneously with the
camshaft, into the crankcase (fig.68)

3.Insert the governor lever fulcrum pin from the outside of the
crankcase and secure it with the relative screw (fig.68).
The lever must be free to effect its full stroke without sticking.

4.Insert the spring between the governor lever and the
accelerator, making sure that it is correctly installed.

5.Check that the timing marks on the camshaft and crankshaft
gears are correctly aligned with respect to each other (fig. 69).

34

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XIII

70

71

72

kgm 0,5 ÷ 0,6 (Nm 4,9 ÷ 5,9)

kgm 2,2 ÷ 2,4 (Nm 21,6 ÷ 23,8)

kgm 18 ÷ 22 (Nm 176,5 ÷ 215,7)

ENGINE ASSEMBLY

Oil pump

See pag. 25 if you wish to check the rotors.

Fit the external oil pump rotor with the bevel toward the inside of the
cover (fig.70).
Torque the bolts to:

It is good practive to fill the oil suction pipe in order to aid
pump priming when the engine is started up for the first
time.

Timing cover

Check that the timing markeson the camshaft and crankshaft gears
are aligned (fig.69).
Fit the oil seal onto the cover using a normal tubular punch of
appropriate diameter. Mount the cover to the crankcase (fig.71) after
first inserting a gasket between the mating surfaces; tighten the
screws to:

Pulley and flywheel

Tighten the pulley and flywheel nut (fig.72) to:

35

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XIII

73

74

75

76

0,10 ÷ 0,20 mm

kgm 3,6 ÷ 3,8 (Nm 35,3 ÷ 37,3)

ENGINE ASSEMBLY

Pistons

Lubricate the following parts with oil before mounting: the
piston pin, the piston, the cylinder and the big-end bearing

Fit the piston rings onto the pistons (fig.73) in the following order:

1.Chromed compression ring

2.Torsional compression ring (with internal bevel facing upward)

3.Expander oil scraper ring (external bevel facing upward).

Install the piston to the connecting rod, by pushind the wrist pin in,
without heading the piston.

Connecting rods

After having fitted the bearings into the big ends mount the
connecting rods to the crank journals pins; note that the pistons are
marked with an arrow showing the direction of rotation of the
engine. The combustion chamber, which is offset with respect to
the central axis of the piston, must be turned to face the injector
nozzle side. Mount the connecting rod big end cap ensuring that the
reference numbers are aligned with those punched on the
connecting rod itself (fig.74). Torque the bolts to:

Now fit the oil pan after first inserting the appropriate gasket
between the facing surfaces.

Cylinders

Before fitting the cylinders turn the piston rings so that the end gaps
are arranged at intervals of 120° with the end gap of the first
compression ring aligned with the axis of the wrist pin. The lower
face of the cylinders are chamfered to permit the easy insertion of
the piston rings. The operation can be simplified, however, using a
normal piston ring compressor (p.n. 00365R0770) as shown in
figure 75.
Mount the cylinders to the crankcase as shown in figure 76 and then
bring the pistons up to their respective TDC (top dead centre)
positions. The following must now be checked:

1.that the dots punched on the flywheel (TDC) correspond to the
reference mark on the flywheel-housing

2.that the pistons protrude over the top surface of the cylinders
(fig.76) by a distance of:

This distance is adjusted with special shims that are inserted
between the bottom surface of the cylinder and the crankcase

0.1 - 0.2 - 0.3 mm.

36

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

77

78

79

80

XIII

1,75 ÷ 2,25 mm

4 kgm (Nm 39,2)

0,15 mm

ENGINE ASSEMBLY

Checking injector protrusion

Before mounting the heads to the cylinders fit the injectors into their
housings and, after having secured them temporarily, check the
protrusion of the nozzles from the head faces (fig.77). Protrusion S
should be:

Cylinder heads

For checking and overhaul of the cylinder heads refer to page 19.
Fit the push rods and oil sealing O-rings on the cover pipes and
proceed to install the cylinder heads with the relative gaskets on the
facing surfaces.

Make sure that the oil seal rings are correctly seated in the
heads to avoid the risk of oil leaks.

Align the heads using a metal bar or the exhaust manifold (fig.78).
Following a cross pattern tighten the head nuts (fig.78) in
increments of 1 kgm until you reach the value:

This value is adjusted by inserting copper washers between the
injectors and the injector supporting faces on the heads (fig. 77).

Valve clearance

The clearance between valves and rockers with the engine cold
(fig.79) is:

This clearance is to be adjusted with the pistons at their respective
TDC compression positions.

Injection pumps

1.Insert the injection pump tappet (D) and spacer (C) into the
housings in the crankcase (fig.80).

2.Assemble the injection pumps (A fig. 80) on the crankcase and
secure them on the adjustment sleeve by means of the
appropriate pins (E or H fig. 80) on PF30 BOSCH pumps. Then,
place the advance adjustment shims (B, fig. 80) between the
crankcase and the pump.

3.Fix the injection pump connection rod (A, fig.81) to the speed
governor lever tie rod (B, fig.81)

4.Secure the injection pumps to the crankcase, taking care to turn
the first injection pump around through approximately 3/4 of a
turn in a clockwise direction.

intake/exhaust

37

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

81

82

83

85

84

XIII

I.P.

22° = 44 mm

20° = 40 mm

(*)

17° = 34 mm

12° = 24 mm

ENGINE ASSEMBLY

5.Release the control sleeves:

- on the traditional pumps by loosening the pins (E, fig.80) and
inserting the appropriate distance collars (F, fig.80).

- on the BOSCH type PF30 pumps by removing the pins (H,
fig.80) and closing the hole on the pump body using plug G.

Important: injection pumps should be released only after
they have been connected to the governor tie rod and
secured to the crankcase. If one or both pumps must be
changed, in order to guarantee the same fuel delivery for
each pump the pump remaining on the crankcase must
be locked using the pins (E or H, fig.80). Alternatively the
above steps must be performed in their entirety.

Injection check

1.Connect the fuel tank to the injection pumps.

2.Set the speed control lever to Max. (fig.83) and the piston to the
start of compression (cylinder nr. 1 on timing gear side).

3.To eliminate the injection delay caused by the milling on the
pumping elements, bring the injection pump connection rod
(A, fig.81) to a position mid-way between minimum and
maximum.

4.Fit the special tool, p.n. 00365R0940, to the delivery valve
holder (timing case side) as shown in figure 82.

5.Turn the flywheel slowly until the column of diesel fuel inside
the special tool starts to move. This indicates the start of static
injection.

For variable advance pumps, the reference mark on the flange bell
(fig.85) must match the intermediate point (*) between TDC and
“IP” (start of dynamic injection) punched onto the flywheel.
On traditional pumps the static start of injection (*) is the same as
the start of dynamic injection (IP).

Should the reference mark (* or IP) fall short of the notch on the
flange bell, this indicates that injection is too advanced so that the
injection pump must be removed and then reassembled with
shims (gaskets) between the pump and the crankcase (fig.84).

Should the reference mark (* or IP) fall after the TDC reference
mark, this indicates that injection is too retarded. In this case
proceed as above but this time removing shims.
Now repeat the injection timing check for all injection pumps.
Note that every 0.1mm shim inserted beneath the pump
corresponds to 2.75mm rotation of the flywheel.

Should the flywheel need changing, determine TDC and mark the
start of static and dynamic injection as shown in the table:

Version

standard

whisper quiet

38

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

89

87

XIII

86

90

88

1,3 ÷ 1,7 mm

ENGINE ASSEMBLY

Injectors and injector pipes

Mount injectors to heads placing copper gaskets in between (see
pag. 36).
Connect the injectors to the pumps by way of the injection lines.

Important: always use two wrenches to loosen or tighten
the unions on the injector pipes (fig.86) thereby ensuring
that the position of the delivery valve holder on the pumps
is not changed (see pag.27).

4.With the fuel feed pump cam in the rest position mount the
pump and actuate it manually .

Electric shut off

If the engine is equipped with an electric shut off, insert the electro­magnet into the crankcase taking care to position the engine shut­off lever in the STOP position; make sure that the injection pump
connection lever moves freely along its entire stroke.
Make the electrical connections as shown in diagram 90.

Feed pump

1.Insert the fuel feed pump tappet into its housing and make sure
that it moves freely.

2.Fit the 0.2 and 1mm adjustment gaskets.

3.With the fuel pump excenter in rest position the tappet should
protrude from the gasket surface (fig. 89) by:

Oil filter

Fit the mesh type oil filter cartridge into the crankcase (fig.87) and
check that the rubber seals and the O-ring on the cover are in good
condition.
On request or MD190 engines can mount an external filter cartridge
that can be screwed onto the crankcase (fig.88). Oil the seal before
assembly.

39

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XIV

91

92

93

94

ENGINE TESTING

Checking oil pressure

1.Remove the bolt from the hole in the crankcase and fit a
pressure gauge with 0 to 10 kg/cm² full scale (fig.92)

2.Start the engine, accelerate to 3000 rpm and wait for the oil to
reach a temperature of 70 to 80°C.

3.The pressure reading must be between 2.5 and 4 kg/cm².

4.Reduce engine speed to minimum; the pressure should not fall
below 1 ÷ 1.5 Kg/cm² with oil temperature of 80°C.

Checking for oil leaks

1.Remove the exhaust gas collection pipe from the inlet manifold
and close the connection with a plug (fig.93).

2.Start the engine and let it run for a few minutes. The high
pressure generated in the crankcase will show up any oil leaks.

3.Reconnect the exhaust gas collection pipe to the inlet manifold.

Dyno testing of engine

After you have placed the engine on the brake (fig.94) perform the
following:

1.Check the oil level (fig.95).

2.Start the engine and let it idle.

3.Check the oil pressure on the pressure gauge (fig.92)

4.Run in engine before testing it at full power.

Speed adjustment (fig.91)

When the engine is hot set idle speed at 1000 rpm and maximum
no-load speed at:
3150 rpm for engines MD150 MD190
3750 rpm for engines MD151 MD191

40

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XIV

95

96

5

15

30

30

30

5

0

0

30%

50%

70%

100%

2000

3000/3600

3000/3600

3000/3600

3000/3600

3000/3600

ENGINE TESTING

Running-in table

LoadTime (min) RPM

In order to check that the setting is correct, without tools,
accelerate the engine a few times with no load and check
the exhaust fumes.
Delivery of diesel fuel is correctly calibrated when the
exhaust gas is slightly coloured by smoke; change the
adjustment if necessary by turning the adjustment screw
(fig.96).

Engine power curves are reported at page 12.

41

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XV

98

97

STORAGE

Storage

Prepare engines as follows for storage over 30 days

Temporary protection (1/6 months)

• Let engine run at idling speed in no-load conditions for 15

minutes.

• Fill crankcase with protection oil MIL-1-644-P9 and let engine
run at 3/4 full speed for 5/10 minutes.

• When engine is warm empty oil pan and fill with standard new
oil (fig. 97)

• Remove fuel tube and empty the tank

• Remove fuel filter, replace cartridge if dirty and refit (fig. 98).

• Carefully clean cylinder fins, heads and fan.

• Seal all openings with tape.

• Remove injectors, pour a spoonful of oil type SAE 30 into the

cylinders and rotate manualy to distribute the oil. Refit injectors.

• Spray oil type SAE 10W into exhaust and intake manifolds,
rocker arms, valves, tappet etc. Grease all unpainted parts.

• Loosen belt

• Wrap the engine in a plastic film.

• Store in a dry place, if possible not directly on the soil and far

from high voltage electric lines.

Permanent protection (over 6 months)

• The following is recommended apart from the above

instructions:

• For the lubrication and injection system as well as for moving
parts use rustproof oil type MIL-L-21260 P10 grade 2, SAE 30
(Ex. ESSO RUST - BAN 623 - AGIP, RUSTIA C. SAE 30) Let the
engine run with rustproof oil and drain any excess.

• Coat external unpainted surfaces with antirust type MIL-C­16173D - grade 3 /Ex. ESSO RUST BAN 398 - AGIP, RUSTIA
100/F).

How to prepare the engine for operation

• Clean engine outside

• Remove protections and covers

• Remove antirust with an appropriate solvent or degreaser.

• Remove injector, fill with standard oil, turn crankshaft by a few

revolutions, remove oil pan and drain the protective oil.

42

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XVI

0,070 ÷ 0,105

0,040 ÷ 0,075

0,025 ÷ 0,075

0,30 ÷ 0,50

0,25 ÷ 0,50

0,023 ÷ 0,038

0,03 ÷ 0,06

0,05 ÷ 0,098

0,020 ÷ 0,059

0,07 ÷ 0,041

0,27 ÷ 0,47

0,003 ÷ 0,013

0,030 ÷ 0,050

0,045 ÷ 0,065

0,2

0,2

0,2

0,8

0,8

0,07

0,15

0,12

0,1

0,1

0,6

0,05

0,1

0,1

MIN (mm)

0,10 ÷ 0,20

0,05 ÷ 0,130

0,15

0,8 ÷ 1,0

1,75 ÷ 2,25

0,10 ÷ 0,20

MAX (mm)

0,2

0,5

0,15

1,3

2,25

0,2

Couplings

Camshaft and central bearings (aluminium crankcase)

Camshaft and central bearings (cast iron crankcase)

Camshaft and flywheel side bearing

End gap of compression rings

End gap of oil scraper rings

Connecting rod and wrist pin

Rocker arm and pin

Fuel pump push rod and housing

Injection pump tappets and housing

Tappets and housings

Oil pump rotor and housing

Pistons and wrist pin

Inlet valve guide to stem

Exhaust valve guide to stem

Spiel (mm) Grezen (mm)

Adjustments

Crankshaft end float

Rocker arm end float

Valve clearance

Valve depth from cylinder head

Injector protrusion

Piston protrusion

QUICK REFERENCE CHARTS

43

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

XVI

= 8.8

8.8

= R10 = 10.9

R10

= R12 = 12.9

R12

kgm

0,52

1,01

1,73

2,84

4,25

5,45

7,54

12,80

19,40

29,50

37,00

51,50

62,40

80,00

Nm

5,1

9,9

17

27,8

41,6

53,4

73,8

125

190

289

362

504

611

784

kgm

0,62

1,22

2,08

3,40

5,10

6,55

9,05

15,30

23,30

35,40

44,40

61,80

74,90

96,00

Nm

6

11,9

20,4

33

50

64.2

88.7

150

228

347

435

605

734

940

R

≥≥

≥≥

≥ 800 N/mm

2

R

≥≥

≥≥

≥ 1000 N/mm

2

R

≥≥

≥≥

≥ 1200 N/mm

2

Nm

3,6

7

12

19,8

29,6

38

52,5

89

135

205

257

358

435

557

kgm

0,37

0,72

1,23

2,02

3,02

3,88

5,36

9,09

13,80

21,00

26,30

36,60

44,40

56,90

4 x 0,70

5 x 0,80

6 x 1,00

7 x 1,00

8 x 1,25

9 x 1,25

10 x 1,50

13 x 1,75

14 x 2,00

16 x 2,00

18 x 2,50

20 x 2,50

22 x 2,50

24 x 3,00

kgm

3,6 ÷ 3,8

2,2 ÷ 2,4

3,5

2 ÷ 2,3

2 ÷ 2,3

0,5 ÷ 0,6

4,5 ÷ 5

2,2

2,2

2,2 ÷ 2,4

4

1,5 ÷ 2,5

18 ÷ 22

(Nm)

(35,3 ÷ 37,3)

(21,6 ÷ 23,5)

(34,3)

(19,6 ÷ 22,6)

(19,6 ÷ 22,6)

(4,9 ÷ 5,9)

(44,1 ÷ 49)

(21,6)

(21,6)

(21,6 ÷ 23,5)

(39,2)

(14,7 ÷ 24,5)

(176,5 ÷ 215,7)

Tightening torques

Big ends

Timing cover

Injector ring nut

Injectors

Injection pump

Oil pump

Injection pump connection

Central bearing halfshells

Central main bearings

Main engine bearings - flywheel side

Cylinder heads

Injection pipe

Flywheel

Standard screw tightening torques

Denomination

Diameter x pitch mm

QUICK REFERENCE CHARTS

44

COMPILER TECO/ATI ENDORSEDDATE

23.06.2003

REG. CODE

1-5302-602

MODEL N°

50884

DATE OF ISSUE

06-03

REVISION 00

La Lombardini si riserva il diritto di modificare in qualunque momento i dati contenuti in questa pubblicazione.
Lombardini se rèserve le droit de modifier, à n'importe quel moment, les données reportées dans cette publication.
Data reported in this issue can be modified at any time by Lombardini .
Lombardini vorbehält alle Rechte, diese Angabe jederzeit verändern.
La Lombardini se reserva el derecho de modificar sin previo aviso los datos de esta publicación.

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