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Cable Handbrake
A correctly adjusted handbrake should raise 1/3 to ½ of the allowable range at the handbrake handle. Poorly
adjusted handbrakes are dangerous. Under adjusted they may allow the trailer to roll and over adjusted can cause
brake linings to drag and overheat the brakes while driving.
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 or caravan is
loaded. If the cable is too tight, the brakes will be applied as the axle moves backward under spring deflection.
Adjuster
To adjust the handbrake cable tension release locknuts A, B and C in the diagram Handbrake Adjuster 1 below. To
tighten the handbrake cable, turn the adjuster wheel D in a clockwise direction. Once adjusted retighten lock nuts
and test. Always ensure that wheels turn freely when handbrake is off. Overtightened cables can cause brakes to
drag and damage the brake linings.
Summary of Contents for FORBES 13 2021
Page 25: ...www marketdirect com au Ph 1300 494 494 21 Electrical Diagrams Switch Panel...
Page 26: ...www marketdirect com au Ph 1300 494 494 22 Main Circuit...
Page 43: ...www marketdirect com au Ph 1300 494 494 39...
Page 48: ...www marketdirect com au Ph 1300 494 494 44 Hub Assembly...
Page 49: ...www marketdirect com au Ph 1300 494 494 45 Trailing Arm Bushes...
Page 70: ...www marketdirect com au Ph 1300 494 494 66 Trip Name Date Km Start Km Finish Cumulative Km...