107
2. When bucket retract, the speed of bucket will be decreased
when bucket teeth exceed and less than horizontal place.
3. Suddenly stop at High speed or with low speed steep hill, travel
motor makes noise.
4. When swing begins and finished,swing motor makes noise
5. When work attchment suffered to excessive resistance or travel
to destination ,control valve makes noise.
6. Center of gravity of excavator tends to work attchment or it
gets on flat car only through decrease boom to support excavator
cause unable to support the excavator
7. Loading weight of bucket exceed rated value or the machine
can not swing on the slope.
Note
If the machine is kept in storage for long time, the oil film coated on kinetic surface may be damaged.
After starting the machine. It‘s necessary to cycle individual kinetic surface for 2 to 3 times to let it
completely lubricated.
5.6.2 Fault Examine and Repair
It must stop the machine If there is a fault or the machine can not operate, try to analysis and eliminate, there
are many reasons for hydraulic system fault, try your best to according the following ways、items and
subsequency to maintenance、adjustment and repair.
【Important】:
Please contact with Sunward about disassemble and repair hydraulic component of hydraulic system, user do
not disassemble by themselves.
Note:
The fault and elimilate ways please refers to 《Yanmar Engine Operation and Maintenance Manual》,beacuse
the fault code of electronic-control engine will be showed in the meter,please refers to the following fault code
to check the reason.
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