Komatsu D61EX-24 Operation & Maintenance Manual page 383

MAINTENANCE PROCEDURE
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.
NOTICE
Perform 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 inspec-
tion can be performed only immediately after the engine is stopped.
4.
With the work equipment at the upper limit, turn the start-
ing switch to OFF position (A), and stop the engine.
4-70
k k
CAUTION
MAINTENANCE