Belarus 82.3 - Possible Failures of the Hydrostatic Steering Control and Instructions for Troubleshooting

82.3-0000010 OM
226
6.9 Possible failures of the hydrostatic steering control and instructions for
troubleshooting
The list of possible failures of the hydrostatic steering and instructions for trouble-
shooting are shown in Table 6.9.1.
Table 6.9.1
Failure,
external manifestation, cause
Troubleshooting
Great effort at the steering wheel
No pressure or insufficient oil pres-
sure in the steering control hydraulic
sys
tem (it shall be from 14.0 to 15.5
MPa when steering wheel is turned
against the stop) due to the following
reasons:
- HSC was not bled
-
faulty adjustment of dosing pump
safety valve (low pressure)
-
faulty feed pump (the pump fails to
increase pressure because of low
efficiency factor)
Bleed the HSC hydraulic system by turning the
steering wheel with moving guide wheels from
the
left-most to the right-most position (stop-to-stop po-
sition) for 2-3 times
Contact the dealer. Adjustment of the safety valve
for the required pressure
1)
is necessary. The opera-
tion shall be performed only by maintenance de-
partment
Contact the dealer for feed pump replacement or
repair
Hard friction or jamming of mechani-
cal components of the steering col-
umn
Eliminate the friction in the steering column, for
which do the following:
- reduce tightening of the upper nut;
- lubricate friction surfaces of plastic bushings;
- eliminate contact of universal-
joint yokes with
steering column bracket walls
Increased turning torque of FDA re-
duction gear
Repair the FDA
Steering wheel turns without turning the wheels
There is no oil in the tank
Fill the tank with oil up to the required level and
bleed air from the hydraulic system of HSC
Improper adjustment of dosing pump
valves. Adjusting pressure of the
safety valve exceeds the adjustment
pressure of anti-shock valves
Contact the dealer. It is necessary to adjust the
safety valve and the anti-shock valves to the re-
quired pres
sure. The operation shall be performed
only by maintenance department
1)
Sealings of the hydraulic cylinder
piston are worn out
Repair or replace the hydraulic cylinder
Steering wheel fails to turn in reverse direction (by 20…30 mm) when the effort is
taken off the steering wheel after turning
Hard friction or jamming of mechani-
cal components of the steering col-
umn
Stop friction in the steering column, for which per-
form the following:
- reduce tightening of the upper nut;
- lubricate friction surfaces of plastic bushings;
- eliminate contact of universal-
joint yokes with
steering column bracket walls