Komatsu Utility 69001, Operation & Maintenance Manual

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MAINTENANCE
SERVICE PROCEDURE
4-71
EVERY 4000 HOURS SERVICE 4
Maintenance for every 50, 250, 500, 1000 and 2000 hours service should be carried out at the same time.
REPLACE ACCUMULATOR (FOR CONTROL CIRCUIT) 4
Replace the accumulator every 2 years or every 4000 hours, whichever comes sooner.
WARNING
The accumulator is charged with high-pressure nitrogen gas, so mistaken operation may cause an explo-
sion, which will lead to serious injury or damage. When handling the accumulator, always do as follows.
The pressure in the hydraulic circuit cannot be completely removed. When removing the hydraulic equip-
ment, do not stand in the direction that the oil spurts out when carrying out the operation. In addition,
loosen the bolts slowly when carrying out the operation.
Do not disassemble the accumulator.
Do not bring it near flame or dispose of it in fire.
Do not make holes in it or weld it.
Do not hit it, roll it, or subject it to any impact.
When disposing of the accumulator, the gas must be released. Please contact your Komatsu distributor to
have this work carried out.
If operations are continued after the performance of the accu-
mulator has dropped, it will be impossible to release the
remaining pressure in the hydraulic circuit if there should be a
failure on the machine. Please ask your Komatsu distributor to
replace the accumulator.
CHECK WATER PUMP 4
Check the water pump and its relative parts for water leak, and if anything abnormal is found, call on your Komatsu
distributor for repairs or replacement.