Belarus 80.1 Operation Manual page 361

Table 7.9.1 continued
Failure,
external manifestation, cause
Steering wheel fails to turn back (by 20...30 mm) when the effort is taken off
the steering wheel after turning
Excessive friction or sticking in
steering column's
components
The springs that return the spool of
dosing pump to the neutral position
have lost their flexibility or are bro-
ken
Steering wheel goes on rotating after the turn was finished
Gripping of sleeve with the spool
(possible due to dirt accumulation)
Spool recentering springs of dos-
ing pump have lost spring flexibility
or are broken
The spline drive of the steering
column and the dosing pump are
mounted out-of-line or with an in-
sufficient side clearance
Loss of tightness of dosing pump at spool shaft end, at slot housing 
gerotor pair  cover
Worn-out sealing of spool
Loosened tightening of doser
cover bolts
Cone pins of HSC hydraulic cyl-
inders or steering link are not
tightened
Increased play in steering joints
Worn-out mechanical joints or
bearings
Air presence in the HSC hydraulic
system
Stop friction in steering column by doing the following:
mechanical - loosen upper nut;
- lubricate friction surfaces of plastic bushings;
- eliminate contact of cardan-joint yoke with steering
column bracket walls.
Contact the dealer. Replacement of springs, assembly
and performance check shall be carried out by the
maintenance department in compliance with the instruc-
tions of the manufacturer
Contact the dealer. Rinsing of dosing-pump compo-
nents is required. Assembly and check of operability
shall be performed only by maintenance department in
accordance with manufacturer's instruction
Contact the dealer. Replacement of springs, assembly
and check of operability shall be performed only by
maintenance department in accordance with manufac-
turer's instruction
Loosen four bolts retaining the dosing pump on the
steering column. To expand the clearance set max. 1,5
mm thick additional washers between the dosing pump
and the steering column bracket. Tighten the bolts with
a torque of 20 to 25 Nꞏm.
Contact the dealer. Replacement of faulty seals, as-
sembly and check of operability shall be performed
only by maintenance department in accordance with
manufacturer's instruction
Tighten the bolts with the torque of 30 to 35 Nꞏm
Wobbling of steered wheel during movement
Tighten pin nuts
Eliminate play in steering joints as indicated in section 6
"Technical maintenance"
Replace worn-out components
Bleed air from 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 posi-
tion) for 2-3 times
Troubleshooting
1)
1)
1)
361
80-0000010B OM
1)