Maintenance
Drive unit/diesel engine
138
BA RC50_RC70 en 00
Draining water sump
NOTICE
Water sump in the fuel!
Property damage to the diesel engine by water sump in the fuel
system.
■
Drain the water sump immediately when the pilot light of the fuel
prefilter flashes.
■
Dewater the fuel prefilter regularly at the sensor according to the
water content of the fuel.
Open the vent screw [4].
Disconnect the connector [2] for the sensor [1] and unscrew the
sensor from the filter cartridge with two turns.
Allow the waste water to drain from the filter.
Screw the sensor [1] into the filter cartridge and tighten.
Connect the plug connector [2] to the sensor.
Screw in and tighten the vent screw [4].
Vent the fuel system.
4.03.06 Bleeding the fuel system
NOTE
Fuel system bleeding is performed when the fuel pump is
running (electrical system ON).
Several bleeding cycles are required.
Open the bleed screw [1] only at the fuel filter (not at the fuel
prefilter).
Switch on the electrical system until fuel runs out of the bleed bore
[1]. Do not start the diesel engine.
Screw in and tighten the bleed screw [1].
Briefly switch off and restart the electrical system.
After approx. 30 seconds, briefly switch off and restart the electrical
system.
Repeat this operation four times.
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