Coarse Fuel Filter Maintenance; Draining Water From Coarse Filter - Yaroslavl Engine Plant YMZ-536 Operation Manual

Draining collected water is necessary when the water sump is
full, when the replaceable filter is changed, or before possible freezing
in cold weather conditions.
WARNING! RISK OF FREEZING. DRAIN THE WATER
FROM THE SUMP IN ORDER TO AVOID IT.
1. Switch off the engine to prevent air from entering the fuel
system.
2. Unscrew the plug of the drain hole 2 (Fig. 40) at the bottom
of the water sump and let the water drain.
3. Screw back the drain plug 2.
The water sump is packaged and supplied together with a
special wrench to screw and unscrew the sump.
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COARSE FUEL FILTER
MAINTENANCE
DRAINING WATER
FROM COARSE FILTER
Fig. 40. Water drain:
1 – water sump;
2 – drain plug
CHANGE OF WATER SUMP