Maintenance and Service
Diesel engine
7.1.4.1 Replacing/draining water of the fuel prefilter insert at the electric
pump
The filter insert must be changed once a year or if it takes too long to fill the intermedi-
ate tank or if it does not fill (the R-Touch shows the following icon ). (See Page 169)
(1) Electric pump for diesel fuel
(11) Fuel prefilter cover
(12) Drain screws
(13) Water collecting vessel
Replace the filter insert as follows:
– Shut down the diesel engine.
– Make sure that the level of the fuel tank is below the level of this filter (if the fuel
gauge is below 100 %, it is certainly the case).
– Block the connection to the buffer tank. To do it, move the service lever (7) on
the fuel supply control unit (6) by 45° backward to the SERVICE position (See
Page 356).
– Turn the both drain screws (12) out and drain the collected water and fuel from the
filter.
– Remove the lid (11) (wrench size 46) from the filter housing.
– Uninstall the old filter insert and exchange it for a new one with the ROPA
item no. 303016700.
– Dispose of the old filter insert in compliance with the local disposal regulations.
– Turn the both drain screws (12) again in the water collection vessel.
– Moisten the new sealing for the lid (11) lightly with oil.
– Install the lid (11) (tightening torque 40Nm) with the new sealing. Make sure that
the sealing is not damaged in the process.
– Open the fuel connection to the intermediate tank. Move the service lever (7) on
the fuel supply control unit (6) by 45° forward (operating position).
– Bleed the fuel system. (See Page 356)
– Check the fuel system for leakage.
Draining water from the water collecting vessel
Draining of water collected is required when the water collecting vessel is full, freezing
threatens or the filter element is replaced.
– Unscrew drain screws (12) at the bottom of the water collecting vessel (13).
– Let the water drain.
– Retighten the drain screws.
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