Fuel system
OPM 100 en-GB 89
© Scania CV AB 2023, Sweden
Venting the fuel system using a hand
pump
Engine-mounted fuel filter housing
On newer engines, the fuel filter housing is
equipped with a continuous venting function.
This means that the air that ends up in the system
is led back to the fuel tank. However, the fuel
system needs to be bled when the tank is run dry
or when work is being carried out on the fuel sys-
tem.
1. Connect a clear plastic hose to the bleed nip-
ple on the fuel filter housing. Let the plastic
hose drop into a container that holds at least
5 litres (1.3 US gallons).
2. Unscrew the hand pump handle.
3. Open the bleed nipple on the fuel filter hous-
ing and pump until fuel runs out, which will
take around 100 pump strokes. Close the
bleed nipple.
4. Start the engine and open the bleed nipple
carefully. Approximately 3 litres (0.8 US
gallons) will run out into the container before
the fuel coming out will be free of air.
5. Close the bleed nipple, remove the hose and
tighten the hand pump handle.
On older engines, the bleed nipple may be fitted
in the fuel filter housing.
Engines with continuous venting
1. Bleed nipple
2. Hand pump
Engines with a bleed nipple in the fuel filter housing
1. Bleed nipple
2. Hand pump
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