Triumph TR3 drawing


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Alternative aluminum alfin brake drums for 9" Triumph brakes

240-Z drums will fit Triumphs with 9" rear brakes. This includes late TR3As andmost TR-4's, 250's and 6's. The Datsun aluminum drums need to have the center hole enlarged a bit, but the bolt pattern is the same. If you want to retain those little drum hold-down screws, the holes for them will need to be drilled and countersunk as well. The backing plates of some brakes will foul the inner edge of the drum, so the drum may need to be trimmed there, too. Test this first, though, as they don't always need to be trimmed.

John Lye






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