DAF CF65, CF75, CF85 Series . Manual — part 426

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Removal and installation

CE ENGINE FUEL SYSTEM

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9.

Install the cable harness (3) to the fuel rail (2)
and secure it using cable ties.

10. Fit the connectors of the injectors (1) in the

valve sleeve.

11. If it has been removed, fit the plug of the inlet

air temperature/boost pressure sensor to the
sensor.

12. Fit the connector of the fuel rail pressure

sensor.

13. Start the engine and check the fuel system

for leaks.

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CE ENGINE FUEL SYSTEM

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Removal and installation

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ΧΦ65/75/85 series

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5.5 REMOVAL AND INSTALLATION, FUEL RAIL PRESSURE-LIMITING VALVE

When removing the pressure-
limiting valve, 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 fuel rail pressure-limiting valve
1.

Clean the pressure-limiting valve (2) and the
surrounding area.

2.

Remove the fuel return pipe (3) from the
pressure-limiting valve (2).

3.

Remove the pressure-limiting valve (2) from
the fuel rail (1).

Installing fuel rail pressure-limiting valve
1.

Check the sealing surface and the screw
thread of the pressure-limiting valve and the
fuel rail.

2.

Install the pressure-limiting valve in the fuel
rail and tighten the valve to the specified
torque. See "Technical data".

3.

Fit the fuel return pipe on the pressure-
limiting valve.

4.

Start the engine and check the pressure-
limiting valve for leaks.

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200416

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Removal and installation

CE ENGINE FUEL SYSTEM

ΧΦ65/75/85 series

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5.6 REMOVAL AND INSTALLATION, HIGH-PRESSURE PUMP

When removing the high-pressure
pump, 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 high-pressure pump
1.

Clean the high-pressure pump and that part
of the engine around it thoroughly with, for
example, a steam cleaner. Cover the places
at which leaks have been detected to
prevent dirt getting into the fuel system.

2.

Disconnect the fuel pipes from the high-
pressure pump. Loosen the return pipe only
on the high-pressure pump.

3.

If fitted, uncouple the connector of the fuel
temperature sensor (1) on the fuel fine filter
head and the connector of the fuel pump
control solenoid valve (2).

4.

Remove the fuel fine filter together with the
filter head.

5.

Loosen both unions from the high-pressure
pipe to the fuel rail as well as the pipe
clamps. Remove the high-pressure pipe.
Plug all openings.

6.

Remove the three high-pressure pump
attachment nuts and then the high-pressure
pump.

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Removal and installation

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Note:
The high-pressure pump is fitted on the gear side
with an adapter ring (1) and an O-ring (2) in the
timing gear case. If the removal of the high-
pressure pump is particularly difficult, it may be
necessary to press the adapter ring (1) carefully
out of the timing gear case using a small pry bar.

Installing the high-pressure pump
1.

Clean the high-pressure pump. Make sure
that no dirt or cleaner can get into the high-
pressure pump ducts.

2.

Check the high-pressure pump and the drive
gear (externally) for wear and damage.

3.

Fit a new O-ring (2) on the adapter ring (1)
and apply a thin layer of engine oil to the O-
ring.

4.

Fit the high-pressure pump and press it into
the timing gear case by means of the
attachment nuts.

5.

Tighten the attachment nuts to the specified
torque. See "Technical data".

6.

Fit the filter head and the fuel fine filter.

7.

Fit the high-pressure pump to the fuel rail
and tighten the unions. See "Technical data"
for the specified tightening torques.

8.

Tighten the pipe clamps.

9.

If fitted, connect the connector of the fuel
temperature sensor (1) on the fuel fine filter
head and the connector of the fuel pump
control solenoid valve (2).

10. Fit the fuel pipes to the high-pressure pump.

11. Bleed the fuel system. See "Inspection and

adjustment".

12. Start the engine and check the fuel system

for leaks.

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