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Braking Systems
Hand Brake
Parking brakes are mechanically operated by cable means. The cable attachment occurs outside of the brake backing plate. Cable
force applied to the parking lever creates a torque through the pivot pin and cam assembly. Torque transferred to the parking
cam results in a spreading force between the primary and secondary shoes. The shoes in turn, move towards the drum until
contact is made. Friction generated between the drum and lining contact surface results in parking brake capability.
Use the cable adjuster to give enough tension to be able to set the handbrake lever on the last two notches of the coupling or
handbrake is 1/3 raised when unladen. This needs to be checked again when the trailer is loaded. If the cable is too tight, the
brakes will be applied as the axle moves backward under spring deflection.
Adjuster Automotive Type
Adjusting the automotive style handbrake on later models is done as follows.
To adjust the left and right side simultaneously:
1. Loosen locknut A
2. Turn shaft 1 clockwise, shortening the length exposed until desired adjustment is achieved.
3. Re-tighten locknut A
For extended adjustment or to balance left and right cables:
1. Choose the side you want to adjust and undo locknut B.
2. Turn locknut C behind mounting bracket clockwise in the direction of the handbrake lever while loosening locknut B to
tighten the cable and apply more handbrake.
3. Turn locknut B clockwise towards the backing plate while loosening locknut C to reduce handbrake.
4. When finished, tighten locknuts to prevent further movement.
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