Every 500 Hours Maintenance; Method For Checking Function Of Brake Accumulator - Komatsu H75051 Operation & Maintenance Manual

MAINTENANCE PROCEDURE
1.
Loosen knob (1) and tilt the top of filter inspection cover (2)
together with the filter.
2.
Remove cover (2) and filter together in the direction of the
arrow.
3.
Remove the filter from cover (2).
4.
Clean it by using compressed air as you did for the fresh
air filter.
Replace the filter with a new one when the dirt clogging
the filter cannot be removed by blowing air or every year.
5.
When installing the filter, fit it to cover (2) first.
Insert the filter and cover (2) together between the filter
box and the floor mat from a diagonally upper position.
6.
Tighten the knob aligning it with the knob installation position.
REMARK
If the filter becomes clogged, the air flow will be reduced, and there will be a rumbling sound from the air
conditioner unit.

METHOD FOR CHECKING FUNCTION OF BRAKE ACCUMULATOR

If the engine stops during travel, the brake can be operated with the oil pressure in the accumulator temporarily.
1.
Park the machine on a level ground and lower the work equipment to the ground.
2.
Apply the parking brake.
3.
Start the engine and run it at medium speed for 1 minute and then stop it.
4.
Turn the starting switch to ON position and repeat depressing the brake pedal.
• If the brake oil pressure caution lamp does not light up when the brake pedal is depressed 6 times, the
gas pressure in the accumulator is normal.
• If the brake oil pressure caution lamp lights up when the brake pedal is depressed 5 times or less, the
gas pressure in the accumulator may be low. Ask your Komatsu distributor for inspection.
REMARK
The inspection must be done within 5 minutes after the engine stops. If the engine is kept stopped, the gas
pressure in the accumulator lowers and the inspection cannot be made.

EVERY 500 HOURS MAINTENANCE

Maintenance for every 50, 100 and 250 hours should be performed at the same time.
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MAINTENANCE