Every 4000 Hours Service; Replace Accumulator (For Control Circuit); Check Water Pump - Komatsu D475A-5E0 Operation & Maintenance Manual

SERVICE PROCEDURE

EVERY 4000 HOURS SERVICE

Maintenance for every 250, 500, 1000 and 2000 hours service should be performed at the same time.

REPLACE ACCUMULATOR (FOR CONTROL CIRCUIT)

Replace the accumulator every 2 years or every 4000 hours, whichever comes sooner.
The accumulator is charged with high-pressure nitrogen gas, so mistaken operation may cause an explosion, which will lead to
serious injury or death. When handling the accumulator, always observe as following.
The pressure in the hydraulic circuit cannot be completely removed. When removing the hydraulic equipment, do not stand
in the direction that the oil spurts out when performing the operation. In addition, loosen the bolts slowly when performing the
operation.
Do not disassemble the accumulator.
Do not bring it near open flame or dispose of it in fire.
Do not make holes in it or weld it or gas cut it.
Do not hit it, roll it, or subject it to any impact.
When disposing of the accumulator, the gas must be released. Ask your Komatsu distributor to have this work performed.
If operations are continued after the performance of the
accumulator has dropped, it will be impossible to release the
remaining pressure in the hydraulic circuit if there should be a
failure on the machine. Ask your Komatsu distributor to replace the
accumulator.
The accumulator is installed to the position shown in the figure on
the right.

CHECK WATER PUMP

Check for oil and coolant leakage, or clogging of the drain hole. If any abnormality is found, contact your Komatsu
distributor for disassembly, repair, or replacement.
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WARNING
MAINTENANCE