DAF LF45, LF55 Series. Manual - part 322

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Removal and installation

CE ENGINE FUEL SYSTEM

ΛΦ45/55 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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Removal and installation

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ΛΦ45/55 series

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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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Removal and installation

CE ENGINE FUEL SYSTEM

ΛΦ45/55 series

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John Guest quick-release coupling

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©

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Removal and installation

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ΛΦ45/55 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.

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