LS U5010 - Page 100

Cat. Faults Main causes Solutions
Hydraulic steering
system does not work.
▲ Pump worn or part damaged
▲ Steering unit damaged or worn
▲ Oil leakage by steering
cylinder piston seal damaged or
worn
▲ Oil leakage by pipe damage
▲ Repair or replace
▲ Repair or replace
▲ Repair
▲ Repair or replace
▲ Steering unit
- Steering unit spline and column
spline is not aligned
- Spool and sleeve damaged by
foreign material
▲
- Check mounted condition of
steering unit and column
- Replace
Steering
System
Hard to operate the
steering wheel.
foreign material
- Excessive tightening torque of
end cap bolt
▲ Pump
- Low speed
- Wearing or failure
▲ Relief valve
- Valve spool clogged
- Setting pressure too low
- Apply regular torque
▲
- Adjust RPM or Repair
- Repair or replace
▲
- Repair or replace
- Reset or adjust
Cylinder does not work
smoothly as steering
wheel movement
▲ Air in steering line if not used
for a long time
▲ Air in suction pipe
▲ Piston seal damaged
▲ Bleed air
▲ Repair
▲ Replace
Steering wheel turns to
the opposite direction.
▲ bad assembly of steering gear
▲
bad assembly of steering hose
▲ Repair
▲
Repair
5
5 5
5 - 32
the opposite direction.
▲
bad assembly of steering hose
▲
Repair
Oil leakage of steering
pump, steering unit,
cylinder and fittings
▲ Seal damaged ▲ Replace seal
Abnormal noise
▲ Lack of oil
▲ Exceeding resistance of
suction line
▲ Air in system
▲ Aid oil
▲ Replace filter or repair
pump
▲ Bleed air