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4. Adjustment of brake
After the tractor has worked for a period, the wear of the friction disc of the brake
makes the gap between friction disc and brake drum or friction disc and brake case and
brake cover increase and affect the brake performance. Excessive free travel will cause brake
ineffectiveness. So the brake should be regularly adjusted to ensure the safety walk of the
tractor. When one of the following faults of the brake appears, adjustment should be done in
time. (No matter the tractor is new or old).
a. Free travel of brake pedal is excessive and cause brake ineffectiveness.
b. Free travel of brake pedal is too small and keep the brake in semi-braking state; the
brake case also generates heat.
c. Left and right braking force is unidentical and tractor yaw motion appears.
1)Adjustment of block brake(shoe brake)
A. Free travel adjustment of brake pedal is the displacement measured from the
highest position of the pedal ,when resistance is felt by pressing the pedal .The travel should
be in the range of 55-65 mm (Fig.4-5) .During adjustment ,firstly loosen the locking nut (9) on
brake pull rod (8) and change the length of the brake pull rod ,then press the brake pedal (5)
from its highest position untill the displacement it 55-65mm and the gap between brake drum
(13) and brake shoe(12) is eliminated . Make the left and right brake pull rod adjustment be
identical ,the tighten them with locking nut (9) (Fig.4-5).
B.Tractor yaw motion adjustment
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