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Inspection and maintenance of hydraulic system
1) Make sure to park the machine on a firm level ground when maintaining hydraulic system.
2) Lower bucket to ground, and stop engine.
3) Begin hydraulic system maintenance after parts, hydraulic oil, and lubricant have cooled
down completely. The hot parts or oil are likely to fly out or spark out and cause serious
damage. When remove screw plug or bolts, keep your body and face away from them.
4) Before maintaining hydraulic system, exhaust air of hydraulic oil tank to release pressure.
5) Make sure to operate control lever several times to release inner pressure.
6) Avoid checking and maintaining the traveling and slewing circuit at slope.
7) When connecting hydraulic hoses and pipes, pay special attention to keep seals surface clean
and avoid damaging them. Please remember following items:
z Wash the interior of hoses, pipes, and oil tank with cleanser; and wipe up them before
connection.
z Use scatheless or non-defective O rings. Don’t damage them in the assembly.
z Never distort high pressure hose, the lifetime of distorted hose will be shortened greatly.
8) Fill same brand & spec. hydraulic oil, never use different brands of oil at the same time.
When you want to use “recommended hydraulic oil brand and specification” listed oil,
make sure to replace all hydraulic oil in the system at the same time.
Check hydraulic oil level…everyday
The hydraulic parts will be very hot
during operation. Please remember to
cool down excavator before inspection
or maintenance.
Never use other hydraulic oils not
included in the list.
Don ’ t start engine when the
hydraulic oil tank is empty.
Never start engine when the
hydraulic oil tank is empty.
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