43
4.
When no more air escapes, screw on the exhaust valve and refit the rubber
cap.
b. Change hydraulic oil
Note:
The oil should be changed after prescribed operating hours (Item 8.2). In
two special conditions, the oil must be changed whenever the oil has become so
contaminated that a drop specimen placed on a piece of filter or blotting paper leaves
a sharply dark spot after a few hours. Here, if fails to change oil, the hydraulic system
will be damaged.
1. Set the blade on the ground and lift the bulldozing plate to top.
2. Shut down the engine and lower bulldozing plate to the ground by operating
the control lever.
3. Bleed the oil tank (Fig. 35).
4. Loosen the nut (Fig.36/2) on the bottom of the oil tank by a few turns and let
oil drain into a container. Screw the nut if oil is drained off;
Attached note:
Connect the nut with flexible tube (Fig.36/2) to control draining
oil.
Fig. 36
Fig. 37
5. Fasten the nut (Fig.36/2);
6. Open the filter (Fig.37/3) and fill up specified hydraulic oil and the oil level
shall reach the middle of the observing glass (Fig. 38/4).
7. Refit the filter cover (Fig.37/3) and close the exhaust valve (Fig.35/1).
8. Start the engine and operate the control levers of all operating devices and
make the control lever move repeatedly by maximum distance, in this way, the
hydraulic system can be filled with hydraulic oil and air in it can be drained;
9. Set all Working Mechanism on the ground, strop the engine and bleed air
from hydraulic tank;
10. If necessary, fill up oil to the observing glass through the filter opening.
(Fig.38/4).
Summary of Contents for PY180H
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Page 39: ...35 A3 润滑图 ...
