Komatsu Utility 69001, Operation & Maintenance Manual

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MAINTENANCE
SERVICE PROCEDURE
4-69
METHOD OF RELEASING PRESSURE IN HYDRAULIC CIRCUIT 4
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.
In order to release pressure from the ripper hydraulic cir-
cuit, operate the ripper control lever to the right and left to
each stroke end.
5. Set the work equipment lock lever to the LOCK position.
CHANGE OIL IN DAMPER CASE 4
WARNING
q
The parts and oil is very hot just after the operation.
Wait until the oil temperature drops, then start the
work.
q
The undercover is heavy. Never try to open or close
the cover when directly beneath it. When removing
bolts (2), carry out the work from the rear of the cover
so that you can easily get out of the way.
q
When removing drain plug (5) of the damper case, take
care not to get oil over yourself.
q
Quantity of replacement oil: 1.3 liters
1. Remove the undercover from the rear bottom of the
machine body as follows.
2. Remove two bolts (1) from the front side of the machine
body.
3. Holding the cover, remove two bolts (2) from the rear side
of the machine body.
4. Lower and open the cover gradually.
(A) Front of machine
(B) Dangerous place
(A)
(B)
(C)
(D)
(E)
RAISE
LOWER
FLOAT
LEFT TILT
RIGHT TILT