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MAINTENANCE
SERVICE PROCEDURE
CHECKING FUNCTION OF ACCUMULATOR
For details of handling the accumulator, see Section "HANDLING ACCUMULATOR AND GAS SPRING (PAGE
2-42)".
BRAKE ACCUMULATOR
If the engine stops when the machine is traveling, the oil pressure in the accumulator can be used to apply the brake
as an emergency measure.
1.
Stop the machine on level ground and lower the work equipment completely to the ground.
2.
Apply the parking brake.
3. Start the engine, run it at a mid-range speed for 1 minute, then stop the engine.
4.
Turn the starting switch key to the ON position and depress the brake pedal repeatedly.
If the brake oil pressure caution lamp does not light up even when the brake is depressed 6 times, the gas
pressure in the accumulator is normal.
If the brake oil pressure caution lamp lights up when the brake has been depressed 5 or less times, the gas
pressure in the accumulator has probably dropped. Please contact your Komatsu distributor to have the
accumulator inspected.
REMARK
Carry out the check within 5 minutes after stopping the engine. If the machine is left with the engine stopped, the
accumulator pressure will drop and it will be impossible to check the cause of the problem.
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