Brake Adjustment And Maintenance - Nortrac XT20 Owner's Manual

IMPORTANT NOTES:
1.Adjusting the clutch requires technical skills and specific tools. If uncomfortable completing this task call
Nortrac Technical Support.
2. In order to keep the friction plate from the oil, keep drain hole clear of any blockage below the flywheel
casing. If serious leakage is found, repair immediately. Use solvent to clean the friction plate if necessary.
3. In order to avoid friction plate abrasion, the clutch should be maintained and adjusted frequently; don't
release and engage the clutch randomly; when releasing the clutch, step on the clutch pedal rapidly to set the
limit. Never run the tractor when the clutch is semi-engaged as this will damage the clutch.
4. Never use the tractor when the clutch is not adjusted properly. This will speed up abrasion of the clutch
friction plate and possibly burn the friction plate.
5. When installing the clutch, fill with lithium base grease in the internal cavity of the release bearing support
(6). When dismantling the clutch, replace the release bearing (5) (Figure 4-3). Replace through-out bearing.
4.3 Brake Adjustment
4.3.1
If one the following should occur, the brake should be adjusted:
•
The free stroke of the brake pedal is too large, which can cause a braking failure.
•
The free stroke of the brake pedal is too small, which can cause too little clearance between the
friction plate and the brake hub and semi-braking state.
•
Inconsistant braking force in left and right, which causes the tractor to pull.
4.3.2
Brake Adjustment Method:
•
Adjustment on the brake pedal free path Loosen the lock nut (3) in the brake rod and turn the brake
rod control fork (2) to change the length of the brake rod. Adjust the free stroke of the brake pedal
(displacement of the brake pedal between the highest position and the position where the clearance
between the brake hub (5) and friction plate (4) disappears) within 20–30mm. Make the length of
brake rod (6) consistent. Then fasten the lock nut (3).
•
Adjustment to equalize left and right braking (deviation) In case of inconsistant adjustment of the left
and right brake and hard braking of the tractor during high-speed driving, the impression length of the
left and right tires will become irregular, i.e. "deviation". Adjust the shorter brake rod by the side,
shortening the impression length, or the longer brake rod by the side, lengthening the impression
length, until the impression length of left and right tire are consistant, and braking is reliable. Then
fasten the nut (3).
5. Brake hub
Warning:
Adjust the free strokes so that the left and right brake pedals are consistant, or the tractor
will turn to one side during hard braking, which can cause an accident.
Maintenance Instruction
Figure 4-4 Brake System
1. Brake arm 2. Control fork
6. Brake rod 7. Brake pedal 8. Lock plate components
3. Lock nut 4. Friction plate
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