Komatsu PC18MR-3 Operation & Maintenance Manual page 212

MAINTENANCE 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 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
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 (L) and
turn the starting switch to the OFF position.
MAINTENANCE PROCEDURE MAINTENANCE PROCEDURE
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