Maintenance Instruction
66
4.6.2 Front Axle Adjustment (2 Wheel Drive Model)
Front-Wheel Bearing Axial Clearance Adjustment (Figure 4-6) :
The normal axial clearance of front-wheel bearing should be 0.05–0.15 mm. During operation, it should be
adjusted if the clearance increases to 0.4 mm. When adjusting, jack up the front wheel, remove the bearing cap, pull
out the cotter pin and turn the castle nut until the bearing clearance is eliminated. Then, reverse in a 1/30 to 1/10
circle, insert the cotter pin, lock and mount on the bearing cap.
Front Wheel Toe-In Adjustment (Figure 4-5) :
After 500 working hours, or if the front wheel wobbles or wears too fast, you should check the toe -in
of the front wheel. The correct toe-in value should be 4–8 mm. If in excess of this range, it should be adjusted.
The proper adjustment method is as follows: Put the tractor on flat ground and turn the steering wheel to
center, making sure that the front wheels are straight-away. Loosen the left and right locking nuts of the
tie rod and turn the tie rod, measuring the distance between the two front ends and the rear ends from the
middle of the tire width on the same height as the axis of the front wheels. The difference should be 4–8 mm.
After adjustment, tighten the left/right locking nuts.
Front Wheel Track Adjustment:
Adjust the wheel track by extending or retracting the tie rods. The adjusting range should be
1150–1450 mm., and clearance between each
adjustment should be 100 mm. When adjusting,
loosen the lock nut of the inner arm on the tie rod on
one or both ends. Next, turn the ball joint on the end of
the tie rod on one or both ends to the needed position
and tighten the bolts and nuts. Alternately, turn the
sleeve on the center of the tie rod to move the tire rod
ends in and out.
4.6.3 Front Axle Maintenance
According to the maintenance requirements, add grease to the king pin tube, front axle central swivel pin tube,
and ball joints. Check to make sure that the lock nuts on the tie rod ball joints and the king pins are tight.
Figure 4-6 Front Wheel Bearing Clearance
Adjustment
1. Steep Angle Bearing 2. Castle Nut 3. Cotter Pin
4. Bearing Cap 5. Retainer Ring 6. Bevel Pinion Bearing
