I installed new shoes and drums. There is a 3/4" gap between the back
of the drum and the backing plate. When you look into the gap, about
3/4" of the shoe is outside of the drum. Do I have the wrong drums?
Or you have the wrong shoes. Is the drum up against the axle? If it is then
you probably have the wrong drums. If there's a gap at the axle flange, the
shoes are probably to wide.
Also lay an old drum next to a new drum, they should be the same height.
Same thing for the shoes, they should be the same width.
The shoes are the same as the old ones. I took the old drums to have
them machined, but they were to thin, that is why I bought new ones. I
had the machine shop dispose of the old ones before I could measure
The drum is up against the axle.
Measure the width of your shoes, the machined drum surface should be just a
little wider than the shoes. Maybe 3/16" or so wider. If that checks out OK,
the offset of the drum could still be different, meaning they're for another
I'd just call the store where you got them and give them the diameter of the
shoes and the width, and let them double check the part number of the drums
they sold you.
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