Originally Posted by newtriumphowner
In the process of rebuilding the rear wheel.
Is it possible to clean the inside drum with some kind of cleaner or does it matter ?
I used some solvent but not much came off.
Thanks all any information.
I looks like rust has developed inside the drum marring the finish made by the action of the brake shoe on the metal surface.
In some ways you are between the devil and the deep blue sea on this. You could scrape and wire brush the drum surface to the best ability and then reassemble. The mating surfaces will not be perfect initially and you may suffer from an ineffecient brake until the old shoes rebed themselves into the drum irregularities.
You may get the drum sand blasted and this will give better result for the remating of drum and old shoes.
You may have the drum machined, but it is rarely a good idea to use the old brake shoes, as they will be out of round and so braking effectiveness will be compromised.
The best fix would be to have the drum machined and fit new linings. HTH