21-01-2019, 09:10 PM
My tuppence Paul:
The standard system works alright if it is in adjustment and if slop / friction in the various linkages is eliminated as far as possible. Ideally set it up so all the various levers are operating at right angles when just about to apply, for best mechanical advantage.
I personally wouldn't lose too much sleep over a trace of oil in the hubs if the shoes are dry, not in the short term at least.
Rust on the drums externally is no problem, but the braking surfaces need to be cleaned up. Will they respond to gentle work with emery? Failing that a light skim might be considered, but A7 drums are already a bit on the thin side. Worth considering new drums if they are poor (I had some of Tony's and can recommend them).
Reckless is right, only one adjuster allowed per cable (you really shouldn't need two).
The standard system works alright if it is in adjustment and if slop / friction in the various linkages is eliminated as far as possible. Ideally set it up so all the various levers are operating at right angles when just about to apply, for best mechanical advantage.
I personally wouldn't lose too much sleep over a trace of oil in the hubs if the shoes are dry, not in the short term at least.
Rust on the drums externally is no problem, but the braking surfaces need to be cleaned up. Will they respond to gentle work with emery? Failing that a light skim might be considered, but A7 drums are already a bit on the thin side. Worth considering new drums if they are poor (I had some of Tony's and can recommend them).
Reckless is right, only one adjuster allowed per cable (you really shouldn't need two).