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MAINTENANCE
The gas springs are located at the engine hood (2 places on
the right and left).
In the following cases, ask your Komatsu distributor for inspection, repair, and replacement.
•
The engine hood is heavy to open.
•
Oil or gas is leaking from the gas spring.
METHOD FOR BLEEDING AIR FROM HYDRAULIC CIRCUIT
METHOD FOR BLEEDING AIR FROM PUMP
NOTICE
If the drain hose is installed first, oil will spurt out from the bleeder (1) hole.
Abnormal heat will be generated if the pump is operated without filling the pump case with hydraulic oil.
It may cause a premature damage to the pump.
1.
Loosen the air bleeder (1) (1 place) and check that oil oozes out from the air bleeder.
2.
If the oil does not ooze out, remove the drain hose (2) from
the hydraulic pump case and fill the pump case completely
with hydraulic oil through drain port.
Oil will come out when the drain hose is removed, so se-
cure the hose fitting at a position higher than the level of
the oil in the hydraulic tank.
3.
After completing the air bleeding operation, tighten the air
bleeder (1) and install the drain hose.
METHOD FOR STARTING ENGINE
Start the engine according to OPERATION, "METHOD FOR STARTING ENGINE" and run it at low idle for 10
minutes, and then start the following work.
METHOD FOR BLEEDING AIR FROM CYLINDER
NOTICE
If the engine runs at high speed immediately after startup or a cylinder is operated to its stroke end, air
taken inside the cylinder may cause damage to the piston packing.
1.
Start the engine.
2.
Turn the fuel control dial to Low idle (MIN) position.
3.
Move each cylinder to approximately 100 mm before the stroke end, and repeat the operation 4 to 5 times.
Take care not to move the cylinder to the stroke end.
4.
Turn the fuel control dial to High idle (MAX) position.
5.
Move each cylinder to approximately 100 mm before the stroke end, and repeat the operation 4 to 5 times.
Take care not to move the cylinder to the stroke end.
6.
Turn the fuel control dial to Low idle (MIN) position.
7.
Operate each cylinder 4 to 5 times to the end of its stroke to completely remove the air.
MAINTENANCE PROCEDURE
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