Yaroslavl Engine Plant YMZ-536 Operation Manual page 129

1. Switch off the engine
2. Drain water from the water sump
3. Unscrew the water sump 1 (Fig. 41) by means of the tools
from the package of the new sump. While doing this, hold the
replaceable filter in position so that it should not be
unscrewed.
4. Lubricate the sealing ring 2 of the new sump with motor oil
5. Screw the water sump by hand.
6. Place the special-purpose wrench on the torque wrench and
torque the water sump to 20Nm (2 kgf·m). While doing this,
hold the replaceable filter in position so that it should not be
over-tightened.
7. Check if the screw plug of the drain hole is in.
8. Flush the fuel system using a manual feed pump.
9. Start the engine and check the sump for leakage.
1. Switch the engine off
2. Unscrew the water sump and check it for damage in case it
can be reused. Screw the sump on the new filtering element (see
"Change of water sump" above)
3. Remove the old replaceable filter 2 (Fig. 32). The old filter
may be seated tight in the filter housing. Use proper tools.
Fig. 41. Change of water sump
CHANGE OF COARSE FUEL FILTER
1 – water sump;
2 – sealing ring
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