Richie's Mk1 Restoration

[Lynn Eades]

Rich. theres no spec in my book so try this. I think the original lining thickness was 3/8" So take the curve of a shoe with no lining. Plot a circle from it, adding 2 x the lining thickness, which should give you a nominal size Something like 15" From this and the unworn lip inside your drum, you should be able to make an educated guess at the original drum dia, and how much might already have been turned from your drums. Probably Richard F. is on the nail when he said it might be original dia. plus wear.

[RichardT10829]

Cheers guys, just at work trying to organise stuff so don't have my book to hand

[Lynn Eades]

Rich. be aware that when I said 15'', I should have said " a std nominal size" (what ever it is) I don't have one to measure, here.

[Richard Farrant]

Originally Posted by Lynn Eades

Rich. be aware that when I said 15'', I should have said " a std nominal size" (what ever it is) I don't have one to measure, here.

The drum inside diameter is 14 inches. (taken from Canadian manual). Cannot recollect what was removed to clear the wear on the Scout, but no doubt got it here on my notes somewhere. The machining of drums was done by a local machine shop and shoes were relined by a brake specialist, I informed them of the diameter difference and they finished the shoes accordingly. A bit of hand fettling of linings to ensure shoes fitted the drum snuggly, as I know that modern linings will not bed in quickly and this proved worthwhile on the first test run of the Carrier as I understand.

regards, Richard

[chris vickery]

One website I visited recently on this issue suggested that lining are available in a variety of widths and thicknesses by the 1/8".
Since military drums are so heavy and likely original diameter, a quick turn with as minimal skim as possible should even them up. If originals were 3/8" maybe it is possible to use 1/2" linings by removing adequate material to suit.
I had CMP brakes relined this way with lots of material left on the drum.
When you consider how thin modern drums are, the old military ones are built like tanks. Also, the vehicles we are putting them on are not seeing service conditions loaded to the max or overloaded even. For something like a carrier I personally wouldn't get overly concerned as long as you get new shoes to match up to freshly turned drums.

[Ben]

What Richard said. They were spot on!

[RichardT10829]

how did you hand fettle them ? sand paper then offer them into the drums ?