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MAINTENANCE
SERVICE PROCEDURE
In the following cases, the charge pressure of the accumulator has gone down. Please contact your Komatsu
distributor.
Work equipment does not go down
Stops while going down
METHOD OF RELEASING PRESSURE IN HYDRAULIC CIRCUIT
NOTICE
Finish the steps of operating the blade control lever to the front and back, and to the right and left, to each stroke end within 15
seconds after the engine has stopped. After the engine stops, pressure inside the accumulator begins to gradually go down, so
the pressure cannot be released except right after the engine stops.
1. Lower the work equipment and stop the engine.
2.
Turn the starting switch to the ON position.
3.
Set the work equipment lock lever to the FREE position.
4. Operate the blade control lever fully to the front, rear, left, and
right to release the pressure from the hydraulic circuit.
When releasing the pressure from the hydraulic ripper circuit,
operate the ripper control lever fully to the left and right (in the
case of the fixed multi-shank ripper) or to the front, rear, left,
and right (in the case of the variable multi-shank ripper).
5.
Set the work equipment lock lever to the LOCK position.
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