Komatsu D155A-6 Operation & Maintenance Manual page 325

SERVICE PROCEDURE SERVICE PROCEDURE
5. Turn the starting switch to the ON position (B).
6. Set the work equipment lock lever to the FREE position (F),
then operate the blade control lever fully in the LOWER
direction and check that the work equipment is completely in
contact with the ground.
7. 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.
8. This completes the inspection. After completing the inspection, set the work equipment lock lever to the LOCK
position and turn the starting switch to the OFF position.
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MAINTENANCE MAINTENANCE