Hyundai HX145 LCR, Manual

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7-26
Problem Cause Remedy
Brake is released, but the
turning force is low · Excavator main relief valve is not set
correctly
- Resetting the main relief valve
· Pressure down of motor relief valve -
- Resetting the relief valve pressure
Exchange the relief valve
· Malfunction of check valve - Exchange the check valve
· Scratch of valve plate - Fix or exchange the abnormal parts
Problem Cause Remedy
Leakage at oil seal · Drain pressure is high - Remove the abnormal substances
after exchanging the damaged part
· Seal error - Check a drain line of an equip
Leakage on a assembled
surface · Damage of a O-ring - Exchange O-ring
· Bolt or plug is released - Tighten the parts with fi xed torque
Shortage of rotating force at the standard value Shortage of rotating force at the standard value
Oil leakage Oil leakage
④
⑦
Problem Cause Remedy
Brake is released, but the
turning force is week · Malfunction of relief valve - Fix or exchange the abnormal parts
· Check valve error
· Stick of counter balance spool
· Valve plate scratch / copper peeling
phenomena
Many slip Many slip
⑤
Problem Cause Remedy
It is not variable speed
(low/high 2- stage speed)
changeover · Pilot Line error - Fix or exchange the abnormal parts
· Two speed changeover spool stick
· Swash piston stick
It is not two speed changeover It is not two speed changeover
⑥