28-06-2024, 10:34 PM
Hi
The square headed adjusters on each backplate are turned clockwise until the brakes lock, then back one or two "notches" (1/4 or 1/2 turn ) to establish the correct shoe to drum running clearance.
With substantial pressure on the footbrake, there should be about an equal gap between each side of the "fork-thing" and the pivot of the swinging lever. The swinging lever is a compensator which allows front to rear brake balance, so must be free to perform this function. The fork is only supposed to touch the pivot when the handbrake is in use, or as a fail-safe if a cable broke or was grossly out of adjustment.
Once the cables are set up, they should not need readjustment for a long time. Any brake shoe wear is accommodated by the adjusters on the backplates.
Purely out of interest, the various lever lengths in the cross shaft are such that the cable tension is approximately 60% to the front and 40% to the rear. This was an improvement over the earlier 50:50, and makes rear lockup less likely under heavy braking on wet roads.
The square headed adjusters on each backplate are turned clockwise until the brakes lock, then back one or two "notches" (1/4 or 1/2 turn ) to establish the correct shoe to drum running clearance.
With substantial pressure on the footbrake, there should be about an equal gap between each side of the "fork-thing" and the pivot of the swinging lever. The swinging lever is a compensator which allows front to rear brake balance, so must be free to perform this function. The fork is only supposed to touch the pivot when the handbrake is in use, or as a fail-safe if a cable broke or was grossly out of adjustment.
Once the cables are set up, they should not need readjustment for a long time. Any brake shoe wear is accommodated by the adjusters on the backplates.
Purely out of interest, the various lever lengths in the cross shaft are such that the cable tension is approximately 60% to the front and 40% to the rear. This was an improvement over the earlier 50:50, and makes rear lockup less likely under heavy braking on wet roads.