DAF LF45, LF55 Series. Manual — part 295

©

200416

5-9

Removal and installation

BE ENGINE FUEL SYSTEM

ΛΦ45/55 series

4

2

10. Fit the attachment bolts (1) in the injector

clamping bracket (2) to secure the injector.

Tighten the attachment bolts alternately to a

torque of 2 Nm.

Note:

Pay special attention to the tightening of the

attachment bolts (1). The tightening must be

carried out alternately; ensure that the

injector clamping bracket (2) is not fitted at

an angle.

11. Apply a thin layer of clean engine oil to the O-

ring of the fuel supply pipe, the screw thread

of the nut and the contact surface of the nut

with the fuel supply pipe.

12. Check the bore of the fuel supply pipe for

foreign matter and damage. Also check

whether the supply bore in the injector is

correctly positioned for the bore, because it

is possible to mount the injector turned

through 180

, so that the fuel supply port is

on the other side.

13. Fit the fuel supply pipe. Press the fuel supply

pipe as far as possible into the bore, with the

ball pointing upwards. Ensure that the O-ring

is not damaged in this process.

Note:

The fuel supply pipe has one or two positioning

balls. The fuel supply pipe can only be installed

with the ball(s) on top, as the bore in the cylinder

head has a groove (1) at the top.

i400806

1

1

2

i400790

1

i400807

BE ENGINE FUEL SYSTEM

5-10

©

200416

Removal and installation

2

ΛΦ45/55 series

4

14. Fit the nut (1). Tighten the nut to a torque of

15 Nm.

15. Tighten the injector attachment bolts to the

specified torque; see "Technical data".

16. Tighten the fuel supply pipe nut to the

specified torque; see "Technical data".

17. Connect the injector wiring. Tighten the

attachment bolts (1) to the specified torque.

See "Technical data".

18. Fit the exhaust valve rockers.

19. Adjust the clearance of the exhaust valves.

20. Fit the valve cover.

21. If the fuel rail was removed, re-fit it.

22. Fit the injector pipe.

23. Fit the fuel return overflow valve to the

cylinder head. For the specified tightening

torque, see "Technical data".

24. Connect the return pipe to this valve.

25. Start the engine to bleed the high-pressure

section of the fuel system and inspect the

fuel system for leaks.

1

i400486

i400808

1

©

200416

5-11

Removal and installation

BE ENGINE FUEL SYSTEM

ΛΦ45/55 series

4

2

5.4 REMOVAL AND INSTALLATION, FUEL RAIL

When removing the fuel rail, fuel will

escape. Collect the fuel and avoid

the risk of fire.

Dirt in the fuel system can lead to

significant damage to parts of the

system. Prevent this by cleaning the

parts before disassembly and then

sealing all open connections.

Removing the fuel rail
1.

Remove the connector from the fuel rail

pressure sensor.

2.

If necessary, remove the plug of the inlet air

temperature/boost pressure sensor by

loosening the connector.

3.

Remove the connectors of the injectors (1)

from the valve sleeve.

4.

Disconnect the cable harness (3) on the fuel

rail (2) and bend the cable harness away

from the fuel rail.

}

}

i400809

3

1

2

BE ENGINE FUEL SYSTEM

5-12

©

200416

Removal and installation

2

ΛΦ45/55 series

4

5.

Remove the fuel return pipe from the

pressure-limiting valve on the fuel rail

6.

Loosen the pipe clamps from the high-

pressure pipe to the fuel rail.

7.

Loosen the high-pressure pipe from the high-

pressure pump to the fuel rail on the fuel rail

side by unscrewing the union.

8.

Disconnect the injector pipes.

9.

Remove the fuel rail attachment bolts (2).

10. Remove the fuel rail (3).

Installing the fuel rail
1.

Ensure that the fuel rail is clean.

2.

Fit the fuel rail (3) and hand-tighten the

attachment bolts (2).

3.

Fit the fuel return pipe (1) onto the pressure-

limiting valve on the fuel rail.

4.

Fit the injector pipes.

5.

Fit the pipe clamps from the high-pressure

pipe to the fuel rail. Do not tighten them yet.

6.

Fit the high-pressure pipe unions from the

high-pressure pump to the fuel rail. For the

specified tightening torques of the unions,

see "Technical data".

7.

Tighten the attachment bolts (2) of the fuel

rail to the specified torque. See "Technical

data".

8.

Tighten the bolt connections of the high-

pressure pipe clamps.

i400814

1

3

2

i400814

1

3

2