Komatsu D37EX-24 Operation & Maintenance Manual page 336

MAINTENANCE PROCEDURE
FUNCTION OF ACCUMULATOR
The accumulator (1) stores the pressure in the control circuit.
Even after the engine is stopped, the control circuit can be op-
erated, so the following actions are possible.
• 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.
• The pressure in the hydraulic circuit can be released.
METHOD FOR CHECKING FUNCTION OF ACCUMULATOR
When operating the blade control lever to lower the blade, check the safety around the machine.
NOTICE
If the nitrogen gas charge pressure in the accumulator is low and operations are continued, it becomes
impossible to release the remaining pressure inside the hydraulic circuit if a failure occurs on the ma-
chine.
Replace the accumulator every 2 years or every 4000 hours, whichever comes sooner.
Check the nitrogen gas charge pressure as follows.
1.
Place the machine on a firm, level ground.
2.
Set the parking brake lever to LOCK position (L).
3.
Raise the work equipment (blade) to the upper limit.
4-60
k k
CAUTION
MAINTENANCE