BELARUS-1021/1021.3
Operating manual
135
7.8 Front driving axle
Trouble, its manifestation
Remedy
1. The front axle does not engage automatically in case of rear-wheel slip activated
when driving the tractor forward
Worn out parts of the freewheeling clutch of
the transfer case.
Replace the freewheeling clutch.
Wedge grooves of the outer race of the
freewheeling clutch contaminated with oil
oxidation products and part wear.
Remove the clutch and rinse the clutch parts.
Deformed springs of the roller pressure
mechanism.
Replace the springs.
Overload clutch in the intermediate support
does not transmit the required torque.
Adjust the clutch to transfer a torque of 50 ...
70 kgf•m (500 ... 700 N•m) tightening the
flange nuts from the transfer case side.
Worn out driving and driven overload clutch
disks.
Replace the disks.
Disc springs lost elasticity or broken.
Replace the springs.
The control linkage of the transfer case has
an increased length.
Adjust the linkage length as described in
Adjustments.
2. Rapid wear and lamination of front wheel tires
Tire pressures in front and rear wheels do not
match the recommended values.
To prevent malfunctions, maintain air
pressure in the front and rear tires as per the
recommended values.
Maladjusted toe-in.
Adjust the toe-in as specified in 5.2
Checking and adjusting toe-in of this Manual.
FDA is always engaged due to failure or
jamming in the transfer box control.
Perform the following operations:
- check operation of positive engagement of
the FDA, fix any fault;
- adjust the transfer box control gear.
3. High noise and heat in the area of final drive
Play in the pinion bearings of the final drive.
Adjust preload in bearings of the driving
pinion of the final drive as described in 5.6
FDA adjustments of this Manual.
Incorrect mesh of the pinions of the final
drive.
Check and, if necessary, adjust mesh by the
contact pattern as described in 5.6 FDA
adjustments of this Manual.
