OPERATION & MAINTENANCE MANUAL SWE18UF
90
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.
Check hydraulic oil level…every day
1) Park machine on a level ground.
2) Arm cylinder extracts and bucket cylinder
extends completely to fix excavator.
3) Lower bucket to ground.
4) Run engine idle for 5 minutes.
5) Stop engine, and take out key switch.
6) Pull pilot control lever to lock position.
7) Check oil level meter through the side hole of the left covering part. The oil level should be between
marks. Otherwise you should fill oil.
Fill oil:
1) Open the plastic cover under the left control box, and screw anticlockwise to open screw cover on the
top.
2) Inject hydraulic oil, and check oil lever meter again.
3) Screw down cover.
Never use other hydraulic oils not
included in the table 5.2.11.
Don’t start engine when the
hydraulic oil tank is empty.
Never start engine when the
hydraulic oil tank is empty.
Posture for Checking Hydraulic Oil
Level
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