clean the oil tank and periphery to prevent dirt
contamination. During inspection, pay attention to
the scale on the oil level gauge. When engine is
running, the hydraulic oil level is even with the
central scale of oil level gauge; when engine does not
work, the hydraulic oil level will be a little higher
than the central scale.
b. It is required to change hydraulic oil for a new
vehicle after it runs 2500km, and meanwhile clean
the filter element. Change hydraulic oil every
10000km or every year thereafter.
c. Check oil level every week, and check the
cleanness of hydraulic oil.
d. The method of oil change is as follows:
① Support front shaft;
② Unscrew oil filling breather filter;
③ Start engine, run it at idle speed for 10s, and turn
steering wheel left and right to limit positions for
several times to discharge oil from the oil tank,
booster pump, steering gear and booster cylinder;
④ Retighten the oil return pipe (note that it is
required to keep it clean and prevent dirt and foreign
material contamination), and clean oil tank, oil filling
breather filter and filter element. It is preferred to
replace it with a new filter element at every oil
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