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System Faults Possible 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
▲ Air in brake line
▲ Adjust
▲ Replace
▲ Adjust
▲ Bleed air
After brake pedal
working, it does not
return.
▲ Return spring damaged
▲ Lack of grease in shaft parts
▲ Master cylinder seal damaged
▲ Replace the spring
▲
Remove the rust, apply grease
▲ Replace
Hydrauli
c lift
system
The linkage does not
move up.
▲ Lack of transmission oil
▲ Air in the suction pipe
▲ Hydraulic filter clogged
▲ Hydraulic pump failure
▲ Control valve failure
▲ Cylinder or cylinder related
parts broken
▲ Aid oil
▲ Tighten the filter or replace
seal of connecting part
▲ 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, relief
valve sounds off.
▲
Upper limit of position control
lever is changed
▲ Adjust the upper limit
The linkage does not
move down.
▲ Down speed control valve
locked
▲ Control valve failure
▲ Cylinder damaged
▲ Lift shaft moving part damaged
▲ Turn the knob counter-
clockwise
▲ Repair or replace
▲ Replace
▲ Repair or replace
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