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MAINTENANCE PROCEDURE
After the engine stops, the accumulator pressure decreases gradually. You can check only just after the en-
gine stops.
1)
Keep the work equipment at the maximum reach pos-
ture, turn the starting switch to OFF position (A), and
stop the engine.
2)
Turn the starting switch to ON position (B).
3)
With the lock lever at FREE position (F), operate the
work equipment control levers fully in LOWER direc-
tion and check that the work equipment is lowered to
the ground.
If the work equipment goes down under its own weight and
contacts the ground, the accumulator is normal.
If the work equipment does not go down or stops in midway,
the charged pressure of the gas in the accumulator for the hy-
draulic circuit has probably dropped. Ask your Komatsu distrib-
utor for inspection.
This completes the inspection. After completion of the inspection, set the lock lever to LOCK position and turn
the starting switch to OFF position.
METHOD FOR RELEASING PRESSURE IN HYDRAULIC CIRCUIT
1.
Lower the work equipment to the ground.
Keep the crusher attachment jaws, etc. closed.
4-68
MAINTENANCE
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