Komatsu PC1250-11 Original Instructions Manual page 197

OPERATION
METHOD FOR ADJUSTING DRAIN VALVE
1.
Turn the valve (6) at the bottom of the fuel tank to CLOSE
position (S).
2.
Place a container under the fuel prefilter cartridge to re-
ceive the fuel.
3.
Loosen the drain valve (4) and drain water and sediment
from transparent cup (2), and also drain all the fuel accu-
mulated in the fuel prefilter cartridge (1).
4.
Check that nothing more comes out from the drain hose
(3), then remove the drain valve (4).
5.
Apply a suitable amount of grease to the O-ring (7).
REMARK
When applying the grease, be careful not to allow the
grease to adhere to the water drain port (8) and threaded
part (9) of the drain valve.
6.
Tighten the drain valve (4) by hand until it contacts the bot-
tom of the transparent cup (2).
7.
Remove the fuel container.
8.
Turn the valve (6) at the bottom of the fuel tank to OPEN
position (O).
9.
Bleed air from the fuel system.
REMARK
For air bleeding, see "PROCEDURES FOR BLEEDING AIR FROM FUEL CIRCUIT".
MACHINE OPERATIONS AND CONTROLS
3-131