Maintenance and Service
Diesel engine
– Unscrew the cap of the fuel fine filter (14).
– Slightly pull the screw-on lid with the filter insert from the filter housing and let the
fuel drain.
– Take off the screw-on lid including filter insert.
– Unclip the filter insert by lateral pressure at the lower edge of the filter insert.
– Replace the gasket of the screw-on cover.
– Cover evenly and completely the both sealings of the filter insert with the supplied
grease, as well as gasket and screw-on lid.
– Clip the new filter insert into the screw-on lid.
– Screw on and tighten the screw-on lid including filter insert: tightening torque
25 Nm.
– Move the lever of the 3-way valve (8) to the vertical position (this closes the filter
bowl drain).
– Open the fuel connection to the intermediate tank. Move the service lever (7) on
the fuel supply control unit (6) by 45° forward into operating position and make sure
that the lock is closed correctly.
– Bleed the fuel system. (See Page 356)
– Check the fuel system for leakage.
To exchange the fuel prefilter, proceed as follows:
– Park the vehicle and shut down the diesel engine.
– Shut off the fuel connection to the intermediate tank. Move the service lever (7) on
the fuel supply control unit (6) by 45° backward to the SERVICE position. Thus,
fuel from the intermediate tank can no longer flow into the diesel engine.
– Unscrew the screw-on lid (15) of the fuel prefilter.
– Take off the screw-on lid and the filter insert.
– Put in a new filter insert. Replace the gasket at the screw-on lid (15) and slightly
grease it.
– Screw on and tighten the screw-on lid (15) (tightening torque 25 Nm).
– Bleed the fuel system. (See Page 356)
– Check the fuel system for leakage.
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