Komatsu PC30MR-5 Operation & Maintenance Manual page 320

MAINTENANCE PROCEDURE
2)
Turn the starting switch to ON position (B).
3)
Set the lock lever to FREE position (F).
4)
Operate the work equipment control lever slowly to the
boom LOWER direction, and lower the boom and
make tooth contact to the ground.
Checking of nitrogen gas charge pressure in accumulator
is completed.
• If the work equipment goes down under its own weight
and the teeth contact the ground, the accumulator is
normal.
• If the work equipment does not go down or stops at
halfway, ask your Komatsu distributor for inspection.
Nitrogen gas charge pressure in accumulator for con-
trol circuit may be decreased.
7.
After checking the nitrogen gas charge pressure in accu-
mulator, set the lock lever to LOCK position (L).
8.
Turn the starting switch to OFF position (A).
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MAINTENANCE