DAF 95XF. Manual - part 418

4

XE ENGINE FUEL SYSTEM

Removal and installation

95

XF series

4-6

4.4

REMOVAL AND INSTALLATION OF PUMP UNIT

Fuel is released when the pump unit
is removed. This fuel must be
collected, bearing in mind the risk
of fire.

Any dirt in the system may cause
severe damage to the pump units
and the pump housing.

Removing the pump unit
1.

Remove the electrical connections on the
pump unit.

2.

Remove the fuel pipes on the pump
housing.

3.

Remove the pressure-reducing valve (3)
from the pump housing.

4.

Allow the fuel to escape from the pump
housing.

5.

Remove the injection lines and plug the
pump units and injectors to prevent the
penetration of dirt.

6.

If the pump unit(s) need not be replaced,
the pump unit(s) must be marked to ensure
that they are reinstalled in the same position
in the pump housing.

The pump unit may be
spring-tensioned, depending on the
position of the camshaft in the
pump housing.

7.

Remove the attachment bolts from the
pump unit.

8.

Remove the pump unit. If necessary, use
special tools (DAF no. 0694928 and
DAF no. 1329448).

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95

XF series

Removal and installation

XE ENGINE FUEL SYSTEM

4-7

Installing the pump unit

Lubricating oil may be diluted if a
sealing ring is damaged.

1.

Crank the engine until the camshaft in the
pump housing is in such a position that the
pump unit can be installed in the pump
housing almost without spring tension.

2.

Provide the pump unit with new sealing
rings.
Sealing ring (1) has the largest diameter
and sealing ring (3) the smallest.

3.

Apply a thin film of lubricating oil to the
bores in the pump housing for the sealing
rings.

4.

Apply a thin film of lubricating oil to the new
sealing rings of the pump unit and install the
pump unit in the pump housing without
damaging the sealing rings.

5.

Fit the attachment bolts of the pump unit
and tighten them evenly until the pump unit
abuts on the pump housing.

6.

Tighten the attachment bolts to the
specified tightening torque, see main group
“Technical data”.

7.

Install the pressure-relief valve on the pump
housing.

8.

Install the fuel pipes on the pump housing.

9.

Fit the injection lines.

10. Install the electrical connections on the

pump unit.

11. Bleed the fuel system, see chapter

“Inspection and adjustment”.

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4

XE ENGINE FUEL SYSTEM

Removal and installation

95

XF series

4-8

4.5

REMOVAL AND INSTALLATION OF THE FUEL LIFT PUMP

Fuel is released when the fuel lift
pump is removed. This fuel must be
collected, bearing in mind the risk
of fire.

Any dirt in the system may cause
severe damage to the pump units
and the pump housing.

Removing the fuel lift pump
1.

Remove the fuel pipes on the fuel lift pump.

2.

Remove the attachment bolts (1) from the
fuel lift pump (2).

3.

Remove fuel lift pump.

Installing the fuel lift pump
1.

Check the fuel lift pump sealing ring for
damage. If required, replace the sealing
ring.

2.

Lightly grease the fuel lift pump sealing ring
with lubricating oil.

3.

Apply a locking compound to the
attachment bolts (1), see main group
“Technical data”.

4.

Install the fuel lift pump (2) using the
attachment bolts (1).
Make sure the cam of the fuel lift pump fits
into the camshaft groove.

5.

Tighten the attachment bolts evenly to the
specified tightening torque, see main group
“Technical data”.

6.

Install the fuel pipes.

7.

Bleed the fuel system, see chapter
“Inspection and adjustment”.

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95

XF series

Removal and installation

XE ENGINE FUEL SYSTEM

4-9

4.6

REMOVAL AND INSTALLATION OF PUMP HOUSING

Fuel is released when the pump
housing is removed. This fuel must
be collected, bearing in mind the
risk of fire.

Any dirt in the system may cause
severe damage to the pump units
and the pump housing.

Removing the pump housing
1.

Using special tool (DAF no. 1310477), turn
the crankshaft until the valves of cylinder 6
are in rocking position and the TDC mark on
the flywheel is in the correct position.

2.

Remove the timing-gear cover.

3.

Remove the attachment bolt of the
intermediate gear wheel (3) and pump
housing camshaft gear wheel (4).

4.

Note:
When the crankshaft (1) or the camshaft (2)
without intermediate gear wheel (3) is
rotated separately, the engine’s pistons may
touch the valves.

Remove the intermediate gear wheel (3).

5.

Remove the pump housing camshaft gear
wheel (4).

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