4 Water level sensor cable
Procedure
Step Activity
1 Block the fuel feed line (1) between the fuel tank and fuel prefil-
ter.
2 Place a suitable container under the filter to collect emerging
fuel.
3 Disconnect the water level sensor cable (4) from the drain plug
(3).
4 Release the drain screw (3) and drain the fuel.
5 Unscrew the fuel prefilter, fully unscrew the drain plug with inte-
grated water level sensor.
6 Dispose of the used fuel prefilter according to local environmen-
tal regulations.
7 Clean the drain plug with integrated water level sensor and light-
ly oil the sealing surfaces. Screw in the drain plug into the new
fuel prefilter.
8 Lightly oil the gasket of the new fuel prefilter, fit the filter and
tighten it by hand.
9 Release the fuel feed line and connect the cable of the water
level sensor.
10 Start the engine and perform a test run.
NOTE: When starting the engine, adhere to the procedure under
"7.4 Starting the engine for the first time/after a filter change,
page 42".
11 After the test run, check the fuel prefilter and drain plug for
leaks.
Maintenance 4H50TIC
76 Operator's Manual
HATZ
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