JAC HFC4DA1-2C, Maintenance Manual

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PS
PS
PS PS PowerSteering
PowerSteering
PowerSteering PowerSteering System
System
System System
- 160 -
Fault Fault Symptom Fault Cause Troubleshooting
Arduous
steering wheel
operation
Arduous turns to the left
and right of the steering
wheel
Too low oil level in the power steering oil
reservoir
Refill with oil
Air entrainment Carry out air bleeding
Seize in the steering column or steering
link
Adjust the link.
Filter element blockage in the power
steering oil reservoir Clean and replace the power steering oil
reservoir and change the steering oil
Damage in the power steering pump
Inspect the output operating pressure of
the hydraulic pump with a pressure
gauge
and inspect the pump for
damages; in the case of insufficient
pressure or flow in the power steering
pump, further inspect the hydraulic oil
filter and pipeline for blockage.
Poor performance of the power steering
gear Inspect the power steering gear for
damage
Inspect the v-belt for slipping and
looseness; in the case of gear drive, inspect
the engagement of the drive gear pair Inspect and adjust each part
Air in the system
Inspect for leakage/carry out air
bleeding
Arduous quick turn of the
steering wheel during
idling
Low internal pressure in the power-assisted
system, such as insufficient oil supply of
the power steering pump; slipping and
looseness of the drive belt. Improper
adjustment of the relief valve; Deformation
of the high pressure oil pipe due to high
pressure oil, which may lead to pressure
hysteresis and air entrainment in the
hydraulic system.
Inspect and adjust the whole steering
system
Internal wear in the power steering pump
Replace the power steering pump and
clean the whole steering system