07-07-2018, 01:19 AM
(06-07-2018, 09:07 PM)dickie65 Wrote: I seen to remember that a lot of the replacement brake cable ends were wrongly made which is why they foul the front backplate.
This has been the case since the 1970's ( might even be earlier than that )
I have just had a quick measure on my car. The offset from cam centre line to the outside of the cable end is 3/8" ( 10mm )
The end caps on the cable are about 1/8" thick.
The other problem with the aftermarket cables was the ball neck being worn away by the slot for the ball neck being incorrect.
This means the cable slot pulls the brakes on via the neck.
The cable end should be free to rotate around the ball at a greater angle than the available steering lock.
There should be no need to bend the brake lever. ( Unless you have incorrectly made replacements )
The end of the alloy brake shoes will be badly worn but at least new ends are available. ( This affects the brake lever angle at rest )
The rear cables should be unaffected by the above.
I seem to remember that a lot of the replacement brake cable ends were wrongly made which is why they foul the front backplate.
This has been the case since the 1970's ( might even be earlier than that )
...some replacement cable ends have been cut off square instead of round, the advice given is to use your old ends.
The other problem with the aftermarket cables was the ball neck being worn away by the slot for the ball neck being incorrect.
This means the cable slot pulls the brakes on via the neck.
The cable end should be free to rotate around the ball at a greater angle than the available steering lock.
...observing the works drawing supplied by Ian Dunford the eagle eyed Tony Press has noted the lever is TWISTED, shown by the offset ball position. Austins must have realized the necking problem and I submit the fault lies not with the cable but with the ball position.
There should be no need to bend the brake lever. ( Unless you have incorrectly made replacements )
...unless you have earlier or non twisted replacements
The end of the alloy brake shoes will be badly worn but at least new ends are available. ( This affects the brake lever angle at rest )
...this is interesting, one imagines that at rest the brake shoes will be fully retracted and the cam will be nearly horizontal. The brake lever angle is therefor fixed until the brakes are applied and it approaches vertical. In Rodgers case the front levers are well forward of the optimum 90 deg but this may not be a bad thing! If the drums are oversize or the linings worn there will be some travel in the lever before brakes are on and the lever is hopefully at 90. So if we adjust the excess travel out by tensioning the cable, and if our operating range remains around 90, then we should not experience front grabbing brakes on cornering. A minor extra benefit is that as our cam rotates the lift versus effort ratio improves.