Daewoo 450, 460, D20S-3(B3.3), D30S-3(B3.3), D25S-3(B3.3) user guide

...
4.7 (3)

SB4135E00

J a n . 2 0 0 4

Service Manual

B3.3 Diesel Engine

Lift Trucks

D20S-3(B3.3), D25S-3(B3.3), D30S-3(B3.3),

D32S-3(B3.3), D33S-3(B3.3)

Skid Steer Loaders 450/450Plus, 460/460Plus

Important Safety Information

Most accidents involving product operation, maintenance and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills and tools to perform these functions properly.

Read and understand all safety precautions and warnings before operating or performing lubrication, maintenance and repair on this product.

Basic safety precautions are listed in the “Safety” section or the Service or Technical Manual. Additional safety precautions are listed in the “Safety” section of the owner/operation/maintenance publication.

Specific safety warnings for all these publications are provided in the description of operations where hazards exist. WARNING labels have also been put on the product to provide instructions and to identify specific hazards. If these hazard warnings are not heeded, bodily injury or death could occur to you or other persons. Warnings in this publication and on the product labels are identified by the following symbol.

WARNING

Improper operation, lubrication, maintenance or repair of this product can be dangerous and could result in injury or death.

Do not operate or perform any lubrication, maintenance or repair on this product, until you have read and understood the operation, lubrication, maintenance and repair information.

Operations that may cause product damage are identified by NOTICE labels on the product and in this publication.

DAEWOO cannot anticipate every possible circumstance that might involve a potential hazard. The warnings in this publication and on the product are therefore not all inclusive. If a tool, procedure, work method or operating technique not specifically recommended by DAEWOO is used, you must satisfy yourself that it is safe for you and others. You should also ensure that the product will not be damaged or made unsafe by the operation, lubrication, maintenance or repair procedures you choose.

The information, specifications, and illustrations in this publication are on the basis of information available at the time it was written. The specifications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service given to the product.

Obtain the complete and most current information before starting any job. DAEWOO dealers have the most current information available.

1

Index

 

Introduction

 

About the Manual...................................................

4

How to Use the Manual .........................................

4

Illustrations.............................................................

6

Symbols .................................................................

5

Engine Identification

 

Engine Diagrams ...................................................

9

Engine Views.......................................................

9

Engine Identification ..............................................

7

Engine Dataplate .................................................

7

Specifications.........................................................

8

Troubleshooting Symptoms

 

Procedures and Techniques .................................

20

Troubleshooting Symptoms Charts.......................

20

Coolant Contamination .......................................

34

Coolant Loss.......................................................

35

Coolant Temperature above Normal...................

38

Engine Cranks But Will Not Start

 

(No Exhaust Smoke) ..........................................

22

Engine Difficult to Start or Will Not Start

 

(Exhaust Smoke) (Continued) ............................

24

Engine Difficult to Start or Will Not Start

 

(Exhaust Smoke) ................................................

23

Engine Has Poor Respones ...............................

25

Engine Power Output Low (Continued) ..............

29

Engine Power Output Low..................................

28

Engine Runs Rough or Misfires..........................

27

Engine Stops During Operation ..........................

26

Engine Vibration Excessive ................................

41

Engine Will Not Crank or Cranks Slowly ............

21

Excessive Exhaust (Black Smoke) .....................

30

Excessive Noise (Continued) .............................

40

Excessive Noise .................................................

39

Fuel consumption Is Excessive ..........................

33

Lubricating Oil Consumption Excessive .............

31

Lubricating Oil Contaminated .............................

32

Lubricating Oil Pressure Is Low..........................

36

Oil Level Rises....................................................

37

Complete Engine

 

Complete Engine ..................................................

42

Engine Assembly ................................................

61

Engine Disassembly ...........................................

42

Engine Testing

 

Complete Engine..................................................

89

Measuring Compression Pressure.....................

89

Testing and Adjusting the Fan Belt Tansion .......

91

Fuel System .........................................................

92

Checking and Adjusting Fuel Injection Timing ...

92

Injector .................................................................

95

Assembly ...........................................................

98

Disassembly.......................................................

97

Testing................................................................

95

Lubricating System.............................................

100

Measuring Oil Pressure ...................................

100

Rocker Levers ......................................................

87

Adjusting Valve Clearance .................................

87

Specifications

 

Camshaft and Camshaft Bushing ......................

105

Capscrew Markings and Torque Values - Metric 115

Capscrew Markings and Torque Values - U.S.

 

Customary..........................................................

116

Capscrew Markings and Torque Values .............

115

Connecting Rod, Piston Ring and Piston Pin.....

111

Crankshaft..........................................................

106

Cylinder Block ....................................................

104

Cylinder Head ....................................................

103

Cylinder ..............................................................

109

Flywheel .............................................................

108

Fraction, Decimal, Millimeter Conversions.........

117

Newton-Meter to Foot-Pound Conversion

 

Chart ..................................................................

118

Oil Pump ............................................................

112

Pipe Plug Torque Values ....................................

118

Piston .................................................................

110

Regulator Valve..................................................

113

Rocker Arm Shaft, Push Rod and Tappets.........

102

Tap-Drill Chart - U.S. Customary and Metric......

119

Thermostat .........................................................

114

Timing Gear........................................................

107

Valves, Valve Guides, and Springs ....................

101

Weight and Measures - Conversion Factors......

120

Special Tool

 

Special Tool List .................................................

121

Diesel Engine

3

Index

About the Manual

This Troubleshooting and Repair Manual is intended to aid in determining the cause of engine-related problems and to provide recommended repair procedures.

The material in this manual covers all Signature engines. The manual is divided into sections. Each section is equivalent to a group used in Cummins filmcard system. Some sections contain reference numbers and procedure numbers. Reference numbers provide general information, specifications, diagrams, and service tools where applicable. Procedure numbers are used to identify and reference specific repair procedures for correcting the problem.

This manual is designed so the troubleshooting trees are used to locate the cause of an engine problem. The troubleshooting trees then direct the user to the correct repair procedure. The repair procedures within a section are in numerical order. However, the repair steps within a given procedure are organized in the order the repair must be performed, regardless of the numerical order of the steps. The user must use the Section Contents pages or the Index at the back of the manual to locate specific topics when not using the troubleshooting trees.

How to Use the Manual

This manual is organized to provide an easy flow from problem identification to problem correction. A list of troubleshooting symptoms containing the most common engine problems is in the Troubleshooting Symptoms, Section TS. The manual is designed to use the Troubleshooting Symptoms as a guide to locating the problem and directing the end user to the correct procedure for making the repair. Complete the following steps to locate and correct the problem.

(Step 1)

Locate the symptom on the Section Contents pages of Section TS.

 

Reference to the page number where the Troubleshooting Symptom Tree is

 

found is made to the right of the symptom tree title.

(Step 2)

The left column of boxes in the Troubleshooting Symptom Charts indicates a

 

probable cause of the problem, starting at the top with the simplest and easiest to

 

repair, and continuing downward to the most difficult.

 

The right column of boxes provides a brief description of the corrective action

(Step 3)

with a reference number to the correct procedure used to make the repair.

Locate the probable cause in the left column; then turn to the procedure

 

referenced in the right column.

(Step 4)

The Troubleshooting Symptom Charts are based on the following assumptions:

 

1. The engine has been installed according to the manufacturer's specifications.

 

2. The easiest repairs are done first.

 

3. "Generic" solutions cover problems with the most common applications and

 

original equipment manufacturer (OEM).

Diesel Engine

4

Introduction

Symbols

The following symbols have been used in this manual to help communicate the intent of the instructions. When one of the symbols appears, it conveys the meaning defined below:

WARNING Serious personal injury or extensive property damage can result if the warning instructions are not followed.

CAUSION Minor personal injury can result or a part, an assembly or the engine can be damaged if the Caution instructions are not followed.

Indicates a REMOVAL or DISASSEMBLY step.

Indicates an INSTALLATION or ASSEMBLY step.

INSPECTION is required.

CLEAN the part or assembly.

PERFORM a mechanical or time MEASUREMENT.

LUBRICATE the part or assembly.

Indicates that a WRENCH or TOOL SIZE will be given.

TIGHTEN to a specific torque

PERFORM an electrical MEASUREMENT.

Refer to another location in this manual or another publication for additional information.

The component weighs 23kg [50lb] or more. To avoid personal injury, use a hoist or get assistance to lift the component.

Diesel Engine

5

Introduction

Illustrations

Some of the illustrations throughout this manual are generic and will not look exactly like the engine or parts used in your application. The illustrations can contain symbols to indicate an action required and an acceptable or not acceptable condition.

The illustrations are intended to show repair or replacement procedures. The procedure will be the same for all applications, although the illustration can differ.

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Diesel Engine

6

Introduction

Daewoo 450, 460, D20S-3(B3.3), D30S-3(B3.3), D25S-3(B3.3) user guide

Engine Identification

Engine Dataplate

The engine dataplate shows specific information about the engine. The engine serial number (ESN) and control parts list (CPL) provide information for ordering parts and for service needs.

NOTE: The engine dataplate must not be changed unless approved by Cummins Engine Company, Inc.

00900248

00900249

Diesel Engine

7

Engine Identification

Specifications

Performance

 

 

D20/25/30/32/33S-3

450/450Plus,460/460Plus

 

Standard

-

SAEJ1995

Test Condition

Air Cleaner

-

without but with 3.0kPa intake restriction

Muffler

-

without but with 10.0kPa exhaust restriction

 

Alternator

-

without

 

Fan

-

without

Rated Power

 

kW(PS)

43.4 (59) @ 2200 rpm

48.5 (65) @ 2600 rpm

Max Torque

 

Nm(kgf-m)

202 (20.6) @ 1600 rpm

214 (21.8) @ 1600 rpm

Torque Rising

 

 

7.4%for2200rpmrating

20.0%for2600rpmrating

BSFC

@Rated Power

g/kWh

227 @2200rpm

236 @ 2600rpm

@Max Torque

g/kWh

219 @1600rpm

226 @ 1600rpm

 

General Engine Data

 

 

Naturally Aspirated

Engine Weight (Dry) Less Flywheel and Electronics

245 kg [540 lb]

Compression Ratio

 

 

 

18.8

Bore

 

 

95 mm [3.74 in]

Stroke

 

 

115 mm [4.528 in]

Displacement

 

 

3.26 liters [199 in³]

Firing Order

 

 

 

1-2-4-3

Valve Clearance:

 

Intake

0.35 mm [0.014 in]

 

Exhaust

0.50 mm [0.020 in]

 

 

Rotation Viewed from the Front of the Engine

Clockwise

 

 

 

 

Lubrication System

 

 

Naturally Aspirated

Regulating Valve Opening Pressure

 

490 kPa [71 psi]

Lubricating Oil Capacity:

Total System

7.5 liters [8.0 qt]

8.0 liters [8.5 qt]

Standard Oil Pan Only

7.0 liters [7.4 qt]

 

 

Lubricating Oil Pressure at Idle (Minimum Allowable)

69 kPa [10 psi]

Lubricating Oil Pressure at Rated (Minimum Allowable)

245 kPa [35 psi]

Oil Filter Differential Pressure to Open Bypass Valve

98 kPa [14 psi]

Number of liters [qt] from Low to High

1.5 liters [1.6 qt]

 

 

 

 

Cooling System

 

 

Naturally Aspirated

Coolant Capacity (Engine Only )

 

4.5 liters [4.75 qt]

Standard Modulating

Thermostat Start

82° C [180° F]

Range:

 

Fully Open

95° C [203° F]

Maximum Pressure Cap @ Sea Level

50 kPa [7 psi]

 

 

 

 

Air Induction System

 

 

Naturally Aspirated

Maximum Allowable Intake Restriction at Rated Speed and

762 mm H2O

Load with Dirty Filter Element

 

[30 in H2O]

 

 

 

 

Exhaust System

 

 

Naturally Aspirated

Maximum Allowable Exhaust Restriction at Rated Speed and

75 mm Hg

Load with Dirty Filter Element

 

 

[3 in Hg]

 

 

 

 

Fuel System

 

 

Naturally Aspirated

Maximum Allowable Restriction to the Fuel Transfer Pump

75 mm Hg

or Filter Head Must Not Exceed

 

 

[3 in Hg]

Maximum Allowable Return Line Restriction Must Not

190.5 mm Hg

Exceed

 

 

[7.5 in Hg]

Inlet Pressure to the Injection Pump Range

0.00 kPa [0.00 psi] to 39.0 kPa [5.00 psi]

 

 

 

 

Electrical System

 

 

Naturally Aspirated

Minimum Recommended Battery

12-VDC Starter

 

550 CCA

Capacity with Light Accessories*:

 

 

 

 

Minimum Recommended Battery

12-VDC Starter

 

730 CCA

Capacity with Heavy

 

 

Accessories**:

 

 

 

 

Maximum Allowable

Resistance

12-VDC Starter

0.0012 ohms

of the Starting Circuit:

 

 

 

 

 

*Typical light accessories include: Alternator, small steering pump, and disengaged clutch.

**Typical heavy accessories include: Hydraulic pump and torque converter.

 

Diesel Engine

8

Engine Identification

Engine Diagrams

Engine Views

The following illustrations show the locations of the major external engine components, filters, and other service and maintenance points. Some external components will be at different locations for different engine models.

Intake Side

(Naturally Aspirated)

00900138

1.

Intake Manifold

5.

Fan

2.

Starting Motor

6.

Fuel Filter

3.

Fuel Injection Pump

7.

Oil Fill Cap.

4.

Crankshaft Pulley

 

 

Diesel Engine

9

Engine Identification

Exhaust Side

(Naturally Aspirated)

00900139

1.

Oil Fill Cap

4.

Dipstick

2.

Thermostat Housing

5.

Oil Filter

3.

Alternator

6.

Exhaust Manifold.

Diesel Engine

10

Engine Identification

Front View

(Naturally Aspirated)

00900140

Rear View

(Naturally Aspirated)

00900141

Diesel Engine

11

Engine Identification

Exhaust Side

(Naturally Aspirated)

00900146

1.

Oil Strainer

8.

Camshaft

2.

Oil Pump

9.

Piston

3.

Oil Cooler (Optional)

10.Intake and Exhaust Valve

4.

Regulator Valve

11.Rocker Arm

5.

Oil Filter

12.Timing Gear

6.

Safety Valve

13.Cooling Water.

7.

Crankshaft

 

 

Diesel Engine

12

Engine Identification

Oil Pump

00900148

1.

Bushing

8.

Regulator Valve

2.

Gear Drive (number of teeth: 7)

9.

Valve Spring.

3.

Pump cover

Oil pump

4.

Oil Pump Drive Gear (number of teeth: 22)

5.

Driveshaft

 

• Type: Gear Type

6.

Drivenshaft

 

• Pump Speed: Engine Speed x 1.182.

7.

Driven Gear (number of teeth: 7)

Regulator Valve

 

 

• Set Pressure: 490 ± 50kPa [71 ± 7psi].

Diesel Engine

13

Engine Identification

Fuel System

00900149

1.

Fuel Injection Pump

5.

Fuel Tank

2.

Overflow Valve

6.

Water-in-Fuel Sensor (WIF)

3.

Fuel Solenoid

7.

Fuel Filter

4.

Fuel Injection Nozzle

8.

Hand Priming Pump.

Diesel Engine

14

Engine Identification

 

 

 

 

 

 

 

 

Fuel Injection Pump

 

 

 

00900150

 

 

 

 

 

1.

Pump Holder

A. Fuel Inlet (from Fuel Tank)

2.

Fuel Injection Pump Drive Gear

B. To. Fuel Tank

 

 

(number of teeth: 52)

C. To Fuel Injection Pump

3.

Drive Shaft

D. To Fuel Injection Nozzle.

4.

Fuel Injection Pump (Body)

Fuel Injection Pump

5.

Fuel Filter

6.

Fuel Injection Pipe (No. 1)

• Maker: Zexel

7.

Fuel Injection Pipe (No. 2)

• Type: VE

8.

Fuel Injection Pipe (No. 3)

• Lubrication Method: Forced Lubrication with Fuel

9.

Fuel Injection Pipe (No. 4)

Governor

 

10.Spill Tube

 

 

 

• Type: Mechanical, All-speed Type.

Diesel Engine

15

Engine Identification

 

 

 

 

 

 

 

 

Fuel Injection Nozzle

 

 

 

00900151

 

 

 

 

 

1.

Fuel Drain Line Connector

A. Fuel Inlet (from injection pump)

2.

Nozzle Holder

B. Fuel Injection (to cylinder)

3.

Adjusting Shim

C. Fuel Return (to fuel tank).

4.

Nozzle spring

Fuel Injection Nozzle

5.

Spring seat

6.

Intermadiate Plate

• Maker: Zexel

7.

Nozzle Body

• Injection Pressure: 40 MPa

8.

Retaining Nut

• Adjustment of Injection Pressure: By Shim.

9.

Needle.

 

 

Diesel Engine

16

Engine Identification

Cooling System

00900147

1.

Radiator

6.

Cylinder Head

2.

Thermostat

7.

Piston

3.

Water Temperature Gauge

8.

Cylinder Block

4.

Water Pump

9.

Oil Cooler (optional).

5.

Water Manifold

A. From Oil Pump (oil).

Diesel Engine

17

Engine Identification

Air Intake System

00900227

1.Filtered Air

2.Intake Manifold

3.Intake Valve Port.

Diesel Engine

18

Engine Identification

Exhaust System

00900232

1.Exhaust Valve Port

2.Exhaust Manifold

Diesel Engine

19

Engine Identification

Procedures and Techniques

A thorough analysis of the customer's complaint is the key to successful troubleshooting. The more information known about a complaint, the faster and easier the problem can be solved.

The Troubleshooting Symptom Charts are organized so that a problem can be located and corrected by doing the easiest and most logical things first. Complete all steps in the sequence shown from top to bottom.

It is not possible to include all the solutions to problems that can occur; however, these charts are designed to stimulate a thought process that will lead to the cause and correction of the problem.

Follow these basic troubleshooting steps:

Get all the facts concerning the complaint

Analyze the problem thoroughly

Relate the symptoms to the basic engine systems and components

Consider any recent maintenance or repair action that can relate to the complaint

Double-check before beginning any disassembly

Solve the problem by using the symptom charts and doing the easiest things first

Determine the cause of the problem and make a thorough repair

After repairs have been made, operate the engine to make sure the cause of the complaint has been corrected

Troubleshooting Symptoms Charts

Use the charts on the following pages of this section to aid in diagnosing specific engine symptoms. Read each row of blocks from top to bottom. Follow through the chart to identify the corrective action.

Diesel Engine

20

Troubleshooting Symptoms

Engine Will Not Crank or Cranks Slowly

This is symptom tree T-002.

Cause

Correction

Defective wiring of starting circuit

OK

Specific gravity of battery electrolytr is low, or Battery voltage is low

OK

Staring motor is malfunctioning

OK

Troubleshoot and repair starting circuit wiring including relays and switches.

Check the alternator. If the alternator checks Out, replace the battery.

Replace the staring motor.

Ring gear tooth surface is chipped or damaged

 

Replace ring gear.

 

 

 

Diesel Engine

21

Troubleshooting Symptoms

Engine Cranks But Will Not Start (No Exhaust Smoke)

This is symptom tree T-003.

Cause

Fuel level low in the tank

OK

Improper fuel is being used

OK

Clogged fuel tank air breather hole

OK

Engine does start when voltage is applied to the fuel cut solenoid valve

OK

Engine does not start when voltage is applied to the fuel cut solenoid valve

OK

Clogged prefilter

OK

Clogged fuel filter or strainer

OK

Clogged or leaking fuel piping

OK

Feed pump is damaged or seized

OK

Injector are plugged

OK

Injection pump driveshaft or driveshaft key is damaged

Correction

Fill the supply tank.

Drain fuel and replace with correct fuel.

Clean the fuel tank breather.

Troubleshoot and repair the circuit wiring.

Replace the fuel cut solenoid valve.

Clean the prefilter.

Clean or replace the fuel filter or strainer.

Clean and repair the fuel piping.

Replace the feed pump.

Replace the injectors.

Repair or replace the injection pump.

Diesel Engine

22

Troubleshooting Symptoms

Engine Difficult to Start or Will Not Start (Exhaust Smoke)

This is symptom tree T-004.

Cause

Starting aid malfunctioning or heater mount Does not become warm

OK

Crank speed is too slow (minimum crank Speed: 150 rpm)

OK

Improper fuel is being used

OK

Clogged air cleaner element

OK

Clogged prefilter

OK

Clogged fuel filter or strainer

OK

Leakage, clogging, air in fuel system

OK

Injection pump timing is incorrect

OK

(Continued)

Correction

Replace the starting aid.

Verify drive units are not engaged. Check the Battery and recharge or replace.

Drain fuel and replace with correct fuel.

Clean or replace the air cleaner element.

Clean the prefilter.

Clean or replace the fuel filter or strainer.

Repair and clean the fuel filter or strainer.

Retime the injection pump.

Diesel Engine

23

Troubleshooting Symptoms

Engine Difficult to Start or Will Not Start (Exhaust Smoke) (Continued)

Cause

Overhead adjustments are not correct

OK

Overhead components are damaged

OK

Defective or clogged injection nozzle

OK

Injection pump is malfunctioning

OK

Worn piston ring or cylinder resulting in low compression

Correction

Measure and adjust the overhead settings.

Inspect the rocker levers, rocker shafs, and valve for excessive damage. Replace as necessary.

Replace the defective or clogged injection nozzle

Repair or replace the injection pump.

Replace the worn piston ring or cylinder.

Diesel Engine

24

Troubleshooting Symptoms

Engine Has Poor Respones

This is symptom tree T-005.

Cause

Clogged air cleaner element

OK

Clogged fuel tank air breather hole

OK

Clogged prefilter

OK

Clogged fuel filter or strainer

OK

Clogged or leaking fuel piping

OK

Overhead adjustments are not correct

OK

Defective contact of valve or valve seat Resulting in low compression

OK

Turbocharger does not rotate freely

OK

Defective or clogged injection nozzle

OK

Injection pump is malfunctioning

OK

Worn piston ring or cylinder resulting in low Compression

Correction

Clean or replace the air cleaner element

Clean the fuel tank breather.

Clean or replace the fuel filter or strainer.

Clean and repair the fuel piping

Clean and adjust the overhead settings.

Measure and adjust the overhead settings.

Replace the cylinder head.

Replace the turbocharger.

Replace the defective or clogged injection nozzle.

Repair or replace the injection pump.

Replace the worn piston ring or cylinder.

Diesel Engine

25

Troubleshooting Symptoms

Engine Stops During Operation

This is symptom tree T-006.

Cause

Chassis powertrain is damaged or overloaded

OK

Fuel level low in the tank

OK

Clogged fuel tank air breather hole

OK

Clogged prefilter

OK

Clogged fuel filter or strainer

OK

Clogged or leaking fuel piping

OK

Feed pump piston is damaged or seized

OK

Overhead components are damaged

OK

Injection pump is malfunctioning

OK

Gear train damaged or seized

OK

Piston or connecting rod is damaged

OK

Crankshaft bearing is damaged

Correction

Refer to the OEM’s service manuals.

Fill the supply tank.

Clean the fuel tank breather.

Clean the prefilter.

Clean and or replace the fuel filter or strainer.

Clean and repair the fuel piping.

Replace the feed pump.

Inspect the rocker levers, rocker shafts, and valves for excessive damage. Replace as necessary.

Replace the injection pump.

Refer to OEM’s service manuals.

Replace damaged piston or connecting rod.

Replace damaged crankshaft bearing.

Diesel Engine

26

Troubleshooting Symptoms

Engine Runs Rough or Misfires

This is symptom tree T-007.

Cause

Fuel level low in the tank

OK

Clogged fuel tank air breather hole

OK

Low idle speed is adjusted too low

OK

Clogged prefilter

OK

Clogged fuel filter or strainer

OK

Line between the fuel tank and feed pump are clogged or have air in them

OK

Line between the feed pump and the injector nozzle are clogged or have air in them

OK

Injection pump is malfunctioning

Correction

Fill the supply tank.

Clean the fuel tank breather.

Adjust the low idle speed.

Clean the prefilter.

Clean or replace the fuel filter or strainer.

Clean and repair the lines.

Clean and repair the lines.

Replace the injection pump.

Diesel Engine

27

Troubleshooting Symptoms

Engine Power Output Low

This is symptom tree T-008.

Cause

Improper fuel is being used

OK

Clogged air cleaner element

OK

Clogged fuel tank air breather hole

OK

Full throttle can not be achieved because the fuel lever linkage is bent or not adjusted correctly

OK

Clogged prefilter

OK

Clogged fuel filter or strainer

OK

Clogged or leaking fuel piping

OK

Feed pump is defective

OK

Overhead adjustments are not correct

OK

(Continued)

Correction

Drain and replace the fuel with the correct fuel.

Clean or replace the air cleaner element.

Clean the fuel tank breather.

Repair or adjust the fuel lever linkage.

Clean the prefilter.

Clean and or replace the fuel filter or strainer.

Clean and repair the fuel piping.

Replace the feed pump.

Measure and adjust the overhead settings.

Diesel Engine

28

Troubleshooting Symptoms

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