DAF CF65, CF75, CF85 Series . Manual - part 429

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Removal and installation

CE ENGINE FUEL SYSTEM

ΧΦ65/75/85 series

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5.12 REMOVAL AND INSTALLATION, FUEL RETURN OVERFLOW VALVE

When removing the fuel return 
overflow valve 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 the fuel return overflow valve
1.

To prevent dirt from entering, first clean the 
area around the fuel return connection.

2.

Remove the fuel return pipe (1) on the fuel 
return overflow valve (2) and plug the pipe.

3.

Remove the fuel return overflow valve and 
collect the escaping fuel.

Installing the fuel return overflow valve
1.

Install the fuel return overflow valve. Haal het 
brandstofretour-overstroomventiel aan met 
het voorgeschreven aanhaalmoment, zie 
hoofdgroep "Technische gegevens".

2.

Connect the quick-release couplings of the 
fuel return pipe to the fuel return overflow 
valve.

3.

Start the engine and check the fuel system 
for leaks.

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i400502

CE ENGINE FUEL SYSTEM

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©

 200416

Removal and installation

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ΧΦ65/75/85 series

4

5.13 REMOVAL AND INSTALLATION, LOW-PRESSURE FUEL PIPES

When removing the low-pressure 
fuel pipes, 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. All open connections must 
therefore be sealed.

The low-pressure fuel pipes may have two 
different types of quick-release coupling.

VOSS quick-release coupling

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i400881

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Removal and installation

CE ENGINE FUEL SYSTEM

ΧΦ65/75/85 series

4

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John Guest quick-release coupling

i400882

i400884

CE ENGINE FUEL SYSTEM

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©

 200416

Removal and installation

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ΧΦ65/75/85 series

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Low-pressure fuel pipes fitted with VOSS 
quick-release couplings

Removing low-pressure fuel pipes
1.

Disconnect the fuel pipe (2) by inserting the 
special tool (1)(DAF no. 1329470) into the 
quick-release coupling and removing the 
pipe from the coupling. 

2.

Remove the special tool from the quick-
release coupling.

3.

Plug the openings.

Fitting low-pressure fuel pipes
1.

Clean the quick-release coupling parts and 
apply a thin layer of clean engine oil to the O-
ring.

2.

Fit the pipe on the quick-release coupling of 
the component and push the pipe onto it until 
a clear resistance can be felt and the quick-
release coupling audibly clicks.

3.

Bleed the fuel system. See "Inspection and 
adjustment".

4.

Start the engine and check the fuel system 
for leaks.

i400473

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