Komatsu Utility 69001, Operation & Maintenance Manual

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MAINTENANCE
SERVICE PROCEDURE
4-67
FUNCTION OF ACCUMULATOR 4
The accumulator stores the pressure in the control circuit.
Even after the engine is stopped, the control circuit can be
operated, so the following actions are possible.
q
If the control lever is operated in the direction to lower the
work equipment, it is possible for the work equipment to go
down under its own weight.
q
The pressure in the hydraulic circuit can be released.
The accumulator is installed to the position shown in the dia-
gram on the right.
CHECKING FUNCTION OF ACCUMULATOR 4
Replace the accumulator every 2 years or every 4000 hours, whichever comes sooner.
Check the nitrogen gas charge pressure as follows.
1. Stop the machine on firm, level ground.
2. Operate the parking brake lever to LOCK position (L).
3. Raise the work equipment (blade) to the maximum height.
NOTICE
Carry out the following procedure for lowering the blade to the ground within 15 seconds after stopping
the engine.
When the engine is stopped, the pressure inside the accumulator gradually goes down, so this inspection
can be carried out only immediately after the engine is stopped.