Komatsu D85EX-18 Operation & Maintenance Manual page 354

MAINTENANCE PROCEDURE
6.
Set the work equipment lock lever to FREE position (F).
7.
Operate the blade control lever fully in the direction to low-
er the blade.
8.
Check that the work equipment goes down to the ground
under its own weight.
In the following cases, the gas charge pressure of the accumulator has gone down. Contact your Komatsu dis-
tributor.
• Work equipment does not go down
• Stops while going down
METHOD FOR RELEASING PRESSURE IN HYDRAULIC CIRCUIT
NOTICE
Finish the steps of operating the blade control lever and ripper 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 to the ground and stop the engine.
2.
Turn the starting switch to ON position.
3.
Set the work equipment lock lever to FREE position.
4.
Operate the blade control lever fully to the front, rear, right, and left to release the pressure from the hy-
draulic circuit.
(a) RAISE
(b) HOLD
(c) LOWER
(d) FLOAT
(A) RIGHT tilt
(B) LEFT tilt
5.
Operate the ripper control lever and release the pressure
from the hydraulic circuit.
• When equipped with fixed multi-shank ripper
Operate the ripper control lever fully to the right and left
• When equipped with variable multi-shank ripper
Operate the ripper control lever fully to the front and back, and to the right and left.
6.
Set the work equipment lock lever to LOCK position.
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MAINTENANCE