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MAINTENANCE
5. With the lock lever at the FREE position (F), operate the
work equipment control levers fully in the LOWER direction
and check that the work equipment is lowered to the
ground.
6. If the work equipment goes down under its weight and con-
tacts the ground, the accumulator is normal.
If the work equipment does not go down or stops in mid-
way, the charged pressure of the gas in the accumulator
for the hydraulic circuit has probably dropped.
Please contact your Komatsu distributor for inspection.
7. This completes the inspection. After completion of the inspection, set the lock lever to the LOCK position and
turn the starting switch to the OFF position.
METHOD OF RELEASING PRESSURE IN HYDRAULIC CIRCUIT
q The hydraulic system is always under internal pressure, so when inspecting or replacing the piping or
hoses, always release the pressure in the circuit before starting. If the pressure is not released, high
pressure oil may spurt out and cause serious personal injury.
q The parts and oil are at high temperature after the engine is stopped, and may cause serious burns.
Wait for the temperature to go down before starting the operation.
q When the oil filler cap is removed, oil may spurt out, so turn the cap slowly to release the pressure
before removing the cap.
WARNING
MAINTENANCE PROCEDURE
4
4-73
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