LS U5030 - Page 99

Cat. Faults Main causes Solutions
Brake
Brake does not work or
only one side works.
▲ Wrong brake pedal play.
▲ Lining worn or broken
▲ Left/right pedal play is different
▲ Adjust
▲ Replace
▲ Adjust
After brake pedal
working, it does not
return.
▲ Return spring damaged
▲ Lack of grease in shaft parts
▲ Replace the spring
▲ Remove the rust, apply
grease
▲ Lack of transmission oil
▲ Air in the suction pipe
▲
Hydraulic filter clogged
▲ Aid oil
▲ Tighten the filter or replace
seal of connecting parts
▲
Clean the filter or replace
Hydraulic
System
Lift arm does not raise.
▲
Hydraulic filter clogged
▲ Hydraulic pump failure
▲ Control valve failure
▲ Cylinder or cylinder related
parts broken
▲
Clean the filter or replace
▲ Repair or replace
▲ Repair or replace
▲ Repair or replace
Oil leakage
▲ Connecting part loosened
▲ Oil seal damaged
▲ Pipe cracked
▲ Tighten
▲ Replace
▲ Replace
If lever is placed on the
raising position, and
relief valve sound off.
▲
Upper limit of position control
lever is changed
▲ Adjust the upper limit
Lift arm does not lower
▲ Down speed control valve
locked
▲ Control valve failure
▲
Cylinder damaged
▲ Turn the knob counter-
clockwise
▲ Repair or replace
▲
Replace
5
5 5
5 - 31
▲
Cylinder damaged
▲ Lift shaft turning part
damaged
▲
Replace
▲ Repair or replace