OPERATION & MAINTENANCE MANUAL SWE18UF
66
Inspection and maintenance of hydraulic device
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 removing screw plug or bolts, keep your body and face away from them.
Because even if in the cooled condition, they may be pressurized.
4)
Before maintaining hydraulic system, exhaust air of hydraulic oil tank to release pressure.
Make sure to operate control lever several times to release inner pressure.
5)
Avoid checking and maintaining the travel and slewing circuit at slope. Because even if the
air in the hydraulic tank is released, it still be pressurized by the gravity.
6)
When connecting hydraulic hoses and pipes, pay special attention to keep seals surface clean
and avoid damaging them. Please remember followings:
Wash the interior of hoses, pipes, and oil tank with cleanser; and wipe up them before
connection.
Use intact or non-defective O rings. Don’t damage them in the assembly.
Never distort high pressure hoses, because the lifetime of distorted hose will be shortened
greatly.
7)
Fill same brand & spec. hydraulic oil, never use different brands of oil at the same time.
When delivered from the factory, the excavator has been filled up with hydraulic oil with
“
★
”mark. Thus, the special hydraulic oil with SUNWARD logo is recommended to use for
better service. Failure to comply, our company will not provide warranty.
Never use other hydraulic oils not
included in the list.
Don ’ t start engine when the
hydraulic oil tank is empty.
The hydraulic parts will be very hot
during operation. Please remember to
cool down excavator before inspection
or maintenance.
