Maintenance
Drive unit/diesel engine
132
BA RD18 en 01
4.03.04 Replacing the filter cartridge for the fuel prefilter
Switch off the diesel engine and remove the ignition key.
Allow the machine to cool down to a temperature below 30 °C
(86 °F).
Open the drain valve [1] (screw the conical nipple into the housing).
Open the bleed screw [4].
Drain the fuel and water sump from the filter.
Unscrew the filter cartridge [3].
Unscrew the drain housing [2] from the filter cartridge and clean it.
Remove contamination from the drain valve [1] (check that it works
properly).
Screw the drain housing [2] with a new sealing ring to the filter
cartridge [3] and tighten by hand. Close the drain valve [1] (fully
unscrew the conical nipple out of the housing).
Prior to assembly, apply a thin coat of oil to the rubber seal and
screw the new filter cartridge [1] to the filter head until the seal makes
contact. Tighten the filter cartridge by hand further by half a turn.
Screw in and tighten the bleed screw [4].
Open the bleed screw [5] on the fuel filter cartridge [6] by one
rotation.
Switch on the electrical system until fuel runs out of the bleed bore [5]
on the fuel filter cartridge.
Screw in and tighten the bleed screw [5].
Check for leaks after assembly.
NOTE
Air in the fuel system is fully vented when starting the
diesel engine. For this, several starting attempts may be
necessary. The start process can be activated for a maximum
of 20 seconds at a time; otherwise, the starter winding will
overheat and be destroyed. There must be pauses of at least
1 minute between the individual starting processes in order to
allow the starter to cool down.
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