Hydraulic System Bleeding Valve - Change - Case WX145 Operator's Manual

SECTION 4
HYDRAULIC SYSTEM BLEEDING VALVE
- CHANGE
The air bleeding and sucking valve (1) ensures this
operation inside of the hydraulic oil tank (2), so as to
compensate the hydraulic oil level floating.
This valve maintains a pressure of about 0.3 bar
(4 psi) inside of the tank.
The valve (1) contains a filter element (4), that can-
not neither be cleaned nor replaced. This is the rea-
son why the valve has to be replaced completely.
The filter head is connected to the lower side, so as
to be free to turn. In this way, you avoid that the
valve is removed without authorization.
To unscrew the valve, insert laterally the locking pin
(3), that is delivered with the new valve. Now the old
valve has to be unscrewed with great care (the pres-
sure inside of the hydraulic oil tank is released).
Insert the locking pin (3) inside of the new valve and
tighten the valve manually.
Take out the locking pin and store it (for instance in
the keys bunch) for a future use.
STEERING AXLE - OIL CHANGE
S
WARNING
The axle and the differential box may also be hot
after a long journey.
Leave the axle and differential box to cool down
and wear working gloves.
The axle and differential may be slightly over pres-
surized, so turn the control plug carefully, just far
enough to release the excess pressure (audible
hissing sound).
Collect the escaping oil and discard it without pol-
luting the environment.
Park the machine on a level and firm surface.
Block the rigid axle wheels by placing chocks under
them.
Raise the machine with the levelling blade or the
working equipment until the wheels of the steering
axle are clear of the ground and turn freely.
Shut off the engine.
Place the machine in a safe condition.
4-56
S
Copyright ©
74
75