10-11-2017, 11:22 AM
(This post was last modified: 10-11-2017, 11:28 AM by Robert Leigh.)
(10-11-2017, 09:53 AM)Dave Mann Wrote: I have a friend with a 1931 boat tailed tourer which he has used as everyday transport since the 1950s. He relined the brakes in the summer and soon after when he brakes the brakes grab there is no gentle braking. So he relined the brakes again with linings from another of our cherished suppliers, these have now developed the same problem and with winter approaching and possible icy roads he needs to find an answer. His car has coupled brakes and 1.25" brake shoes and drums. I've gone through the usual loose brake shoe pivots, broken brake shoe springs, oval drums, worn king pin bushes and or shackles. Help, have any of you got any ideas as to the cause.
Apart from what has been suggested, ie the slightest bit of play in suspension fixings which should be rigid, I remember having the problem and it turned out to be a peculiar coating on the drums. It may be worth removing the drums and ensuring that the braking surface is completely clean of any trace of oil or a varnish like surface which is what I found. Labouring with emery cloth until I had a clean metal surface was the answer.
(10-11-2017, 09:53 AM)Dave Mann Wrote: I have a friend with a 1931 boat tailed tourer which he has used as everyday transport since the 1950s. He relined the brakes in the summer and soon after when he brakes the brakes grab there is no gentle braking. So he relined the brakes again with linings from another of our cherished suppliers, these have now developed the same problem and with winter approaching and possible icy roads he needs to find an answer. His car has coupled brakes and 1.25" brake shoes and drums. I've gone through the usual loose brake shoe pivots, broken brake shoe springs, oval drums, worn king pin bushes and or shackles. Help, have any of you got any ideas as to the cause.
Apart from the suggestion of ensuring that all fixings which should be rigid are rigid, it may be worth removing the drums and ensuring that the braking surfaces are all scrupulously clean of oil and any other contaminant. I once found a varnish like coating had developed and neededvery thorough cleaning off with emery cloth, and this cured the problem.