SUNWARD SWE90UF-2PB - 6.7 HYDRAULIC COMPONENTS TABLE

SWE90UF-2PB Operation & Maintenance Manual
148
Swing platform
doesn’t rotate, rotate
slowly or unstably
stoppage of pilot valve.
Stoppage of hydraulic
motor
Stoppage of swing
reduction gearbox
Stoppage of swivel bearing
Grease is needed for swivel
bearing.
Stoppage of swing unlock
circuit
Repair.
Contact with distributor.
Contact with distributor.
Repair.
Inject into grease.
Contact with distributor.
Work attachment
“nodding”
The stuck of check valve of
multi-way valve rod。
Clean or repair.
Abnormal system
noise or vibration
1. Air in the system or oil
deterioration
2. Hydraulic pump
abrasion
3. Relief valve stoppage
1.Retract hydraulic oil for multiple times to
release air or change oil.
2. Contact with distributor.
3. Contact with distributor.