DAF CF65, Service Manual

Page: 83 / 352

©
200416 4-5
Inspection and adjustment
CE ENGINE FUEL SYSTEM
ΧΦ65/75/85
series
4
2
4.3 CHECKING FUEL LIFT PUMP PRESSURES
When inspecting the fuel pressure,
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.
Checking underpressure on suction side of
fuel lift pump
1. Disconnect the fuel pipe from the electronic
unit cooling plate to the fuel lift pump on the
suction side of the fuel lift pump; see
"Removal and installation".
2. Fit the adapter (1), special tool
(DAF no. 1329476), between the pipe which
has been removed and the fuel lift pump and
couple a pressure gauge (2) to this adapter.
3. Bleed the fuel system.
4. Measure the underpressure when the engine
is idling. Compare the readings with the
specified values. See "Technical data".
5. Remove the pressure gauge and the adapter
and fit the fuel pipe.
6. Bleed the fuel system, start the engine and
check the fuel system visually for leaks if no
further measurements are to be carried out.
Checking fuel pressure in fuel lift pump in
front of fuel fine filter
1. Disconnect the fuel pipe from the lift pump to
the fuel fine filter on the delivery side of the
lift pump; see "Removal and installation".
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