22-07-2024, 11:52 AM
Hi
For semi-girling brakes, disregard anything that applies to earlier systems. The front/rear compensator if working properly will automatically apportion the cable tension between front and rear when the brakes are being used reasonably hard.
Once set up in the factory, the adjustment sequence in service is:
Adjust shoe clearance with the backplate adjusters, they should be three quarter of a turn back from binding
If necessary due to cable stretch, equally adjust both the rear cable lengths to get equal clearance each side of the compensator fork with brakes on
Once set up, any subsequent lining wear is compensated for by using the backplate adjusters.
This information is paraphrased from "New Brakes on the Seven" published in The Austin Magazine, November 1936
There should be no more cable slack than necessary to maintain shoe clearance with the brakes off, so you may have to adjust the front cable length as well as the rear for a brand new setup. Note that there is no side to side compensation for the rear brakes, so check that the cables are equally taut with the brakes applied. If you like to be accurate, one way to do this is to firmly apply the handbrake, then pull the middle of each longest rear cable run sideways with a spring balance. Aim for equal deflections and read off the efforts required.
For semi-girling brakes, disregard anything that applies to earlier systems. The front/rear compensator if working properly will automatically apportion the cable tension between front and rear when the brakes are being used reasonably hard.
Once set up in the factory, the adjustment sequence in service is:
Adjust shoe clearance with the backplate adjusters, they should be three quarter of a turn back from binding
If necessary due to cable stretch, equally adjust both the rear cable lengths to get equal clearance each side of the compensator fork with brakes on
Once set up, any subsequent lining wear is compensated for by using the backplate adjusters.
This information is paraphrased from "New Brakes on the Seven" published in The Austin Magazine, November 1936
There should be no more cable slack than necessary to maintain shoe clearance with the brakes off, so you may have to adjust the front cable length as well as the rear for a brand new setup. Note that there is no side to side compensation for the rear brakes, so check that the cables are equally taut with the brakes applied. If you like to be accurate, one way to do this is to firmly apply the handbrake, then pull the middle of each longest rear cable run sideways with a spring balance. Aim for equal deflections and read off the efforts required.