Nortrac XT20 Owner's Manual page 43

Fault
（1）The pre-tightening force is too much.
2. Small conical
gear and （2）Lubrication is poor.
differential
（3）The backlash at gear pair side of
bearing is hot.
conical gear is too small.
3. Abnormal
noises from the (1) Bearing, gear or shaft damage.
final drive.
(1) Free stroke of the brake pedal is too
4. No braking
(2) Friction lining is worn severely or
control.
(3) The free stroke of the pedal is too large.
5 Brakes gets (1) Brake friction disk does not return.
hot. (2) Friction plate and brake hub don't
(1) The travel of the left and right brake
6. The tractor
pulls in one
(2) Brake friction lining on one side is
direction when
braking.
(3) Pressure in two rear tires is uneven.
2.16.1.4
Four-Wheel Drive System Faults and Troubleshooting
Sequence
Fault
No.
Front wheel tire
1. has excessive
wear.
Front wheel
2
shakes.
Loud noise
3 (four-wheel drive
tractors).
Operation Description
Fault reasons
large.
unevenly.
disengage completely.
pedals are not consistant.
damaged.
2-7 Four –Wheel Drive System Faults and Troubleshooting
(1) Front wheel rim or the spoke is
severely deformed.
(2) Toe-in of the front wheel is abnormal.
(3) Steering knuckle and two pin shafts of
the oil tank are worn.
(4) Tire pressure is not adequate.
(5) Front axle does not release before
transportation.
(6) Drive tire thread mounted backwards.
(1) Set nuts or bolts for the ball pin, oil
cylinder and the steering arm are
loose.
(2) Toe-in of the front wheel is abnormal.
(3) Bearing gap too large or severely
worn.
(4) Knuckle pin is severely worn.
(5) Front wheel rim is deformed.
(1) Engagement trace of the front central
drive gear is abnormal.
(2) Clearance between the central drive
bearing is too large or destroyed.
(3) Differential axle is worn or damaged.
(4) Planetary gear or gasket is worn.
(5) Final meshing of planeatry gear pair is
faulty.
（1）Readjust the bearing pre-tightening
force.
（2）Check the oil level, add if necessary.
（3）Readjust the backlash.
(2) Replace bearing, gear or shaft.
(1) Readjust the free stroke of the pedal.
(2) Replace the friction lining.
(3) Adjust the free stroke of pedal according
to requirements.
(1) Replace the return spring.
(2) Adjust according to the requirements.
(1) Adjust.
(2) Replace friction lining.
(3) Check and fill tires with air according to
requirement.
Fault Reasons
37
Troubleshooting
Troubleshooting
(1) Calibrate front wheel rim or
spoke.
(2) Adjust the toe-in.
(3) Replace axis pin.
(4) Fill tire with air according to
requirement.
(5) Disconnect the front drive
axle.
(6) Refit the wheel according to
the requirements.
(1) Check and tighten.
(2) Adjust the toe-in.
(3) Adjust or replace
bearing.
(4) Replace the knuckle pin.
(5) Replace the front wheel rim.
(1) Readjust the meshing lash.
(2) Adjust or replace.
(3) Replace the differential gear
shaft.
(4) Replace the planetary gear
or shims.
(5) Replace the planetary drive
gear.
the