DAF 95XF. Manual - part 386

4

DIAGNOSIS

XE engine inlet/exhaust system

95

XF series

6-2

1

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 0008

4

95

XF series

XE engine brake

DIAGNOSIS

7-1

7.  XE ENGINE BRAKE

7.1

FAULT-FINDING TABLE

FAULT: EXHAUST BRAKE DOES NOT ENGAGE

Possible cause

Remedy

Compressor delivers insufficient air pressure.

Check the operation of the compressor.

Defective engine stop valve.

Check engine stop valve.

Air leak in the air pipe from air drier to engine
stop valve.

Check air pipe.

Butterfly valve stuck in butterfly valve housing.

Check free movement of butterfly valve.

Defective engine stop operating cylinder.

Check operating cylinder.

Electrical fault.

Check electrical circuit.

FAULT: EXHAUST BRAKE REMAINS ENGAGED

Possible cause

Remedy

Defective engine stop valve.

Check engine stop valve.

Defective engine stop operating cylinder.

Check operating cylinder.

Butterfly valve stuck in butterfly valve housing.

Check free movement of butterfly valve.

Electrical fault.

Check electrical circuit.

FAULT: DEB CANNOT BE SWITCHED ON

Possible cause

Remedy

Electrical fault.

Check electrical circuit.

Engine oil pressure too low.

Check engine oil pressure.

©

 0008

1

4

DIAGNOSIS

XE engine brake

95

XF series

7-2

FAULT: DEB REMAINS ENGAGED

Possible cause

Remedy

Electrical fault.

Check electrical circuit.

Magnetic valve mechanically blocked.

Check magnetic valve.

Damaged magnetic valve sealing rings.

Replace all magnetic valve sealing rings.

FAULT: DEB OPERATES IRREGULARLY

Possible cause

Remedy

Electrical fault.

Check electrical circuit.

Incorrect setting of DEB clearance.

Check DEB setting.

Main piston stuck in DEB housing.

Check free movement of main piston.

Operating piston stuck in DEB housing.

Check free movement of operating piston.

Damaged magnetic valve sealing rings.

Replace all magnetic valve sealing rings.

Magnetic valve oil strainer is blocked.

Clean magnetic valve oil strainer.

Control valve stuck in DEB housing.

Check free movement of control valve.

Defective control valve.

Check the operation of the control valve.

Lubricating oil too thick.

Run the engine at operating temperature.

Lubricating oil diluted with fuel.

Check lubricating oil for dilution.

Air bubbles in the oil.

Check the engine’s oil level/oil specification.

Oil duct plugs in DEB housing.

Clean/replace plugs.

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 0008

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95

XF series

Contents

XF ENGINE FUEL SYSTEM

1

CONTENTS

Page

Date

1.

SAFETY INSTRUCTIONS

1-1

0008

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2.

GENERAL

2-1

0008

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2.1

Overview drawing of fuel system

2-1

0008

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2.2

Description of fuel system

2-2

0008

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3.

INSPECTION AND ADJUSTMENT

3-1

0008

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3.1

Inspection and adjustment of injection timing

3-1

0008

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3.2

Checking the fuel level element

3-4

0008

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3.3

Inspection and adjustment of injector opening pressure

3-5

0008

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3.4

Inspection of injector operation

3-8

0008

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3.5

Inspection of fuel system for leaks

3-9

0008

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3.6

Bleeding of fuel system

3-10

0008

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3.7

Checking of gallery pressure

3-11

0008

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3.8

Inspection of Racor filter element

3-12

0008

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4.

REMOVAL AND INSTALLATION

4-1

0008

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4.1

Removal and installation of injection lines

4-1

0008

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

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4.2

Removal and installation of injectors

4-3

0008

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4.3

Removal and installation of injector sleeves

4-5

0008

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4.4

Removal and installation of fuel pump

4-6

0008

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4.5

Removal and installation of fuel pipes

4-9

0008

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4.6

Removal and installation, fuel filter

4-12

0008

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4.7

Removal and installation of fuel prefilter

4-13

0008

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4.8

Removal and installation of fuel level element

4-14

0008

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4.9

Removal and installation of tank filter

4-15

0008

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4.10 Removal and installation of fuel-pump drive sealing ring

4-16

0008

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4.11

Removal and installation of Racor filter element

4-18

0008

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5.

DISASSEMBLY AND ASSEMBLY

5-1

0008

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

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5.1

Disassembly and assembly of injector

5-1

0008

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

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6.

CLEANING

6-1

0008

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6.1

Cleaning injector

6-1

0008

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

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6.2

Cleaning injector sleeve

6-2

0008

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©

 0008

2