Possible Failures Of The Hydraulic Power Steering And Instructions For Troubleshooting - Belarus 80.1 Operation Manual

7.10 Possible failures of the hydraulic power steering and instructions for
troubleshooting
The list of possible failures of the hydraulic power steering and instructions for their
troubleshooting are given in Table 7.10.1.
Table 7.10.1
Failure,
external manifestation, cause
Oil foaming in hydraulic power
steering system due to the following
causes:
- insufficient oil volume in hydraulic
power steering body
- air in HPS hydraulic system
No pressure or insufficient pressure
in the steering control charge hy-
draulic line (it shall be from 8.5 to
9.5 MPa when turning the steering
wheel against the stop) due to the
following reasons:
- faulty adjustment of dosing pump
safety valve (low pressure)
- faulty feed pump (the pump does
not develop pressure due to low
volume efficiency)
Sticking in the mesh "worm – quad-
rant"
Loosened worm nut
Increased play of pins of steering
joints
Loosened nuts attaching quadrant
drop arm or swivel levers
Increased axial shift of turning shaft Adjust the axial shift of turning shaft
Increased clearance in mesh
"worm-quadrant"
Loosened worm nut
Increased play in cardan connec-
tions of steering wheel drive
Increased play of pins of steering
joints
Great effort at the steering wheel
Fill the hydraulic power steering body with oil up to
the required level
Check the suction line and eliminate the loss of
tightness
Adjust the safety valve for the required pressure
Contact the dealer. The pump does not develop
pressure due to low volume efficiency.
Adjust the mesh
Wobbling of steered wheels during travel
Tighten the nut of the worm
Tighten the nuts of pins and steering joints
Tighten the nuts
Increased play of steering wheel
Adjust the clearance
Tighten the nut
Replace worn-out parts
Tighten the nut of pins and steering joints
Troubleshooting
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80-0000010B OM