BlueDevil Posted October 6, 2023 Share Posted October 6, 2023 Anyone know what goes in this hole? The small holes are threaded. Link to comment Share on other sites More sharing options...
BlueDevil Posted October 6, 2023 Author Share Posted October 6, 2023 This might help Link to comment Share on other sites More sharing options...
keiser31 Posted October 6, 2023 Share Posted October 6, 2023 (edited) Looks like a brake adjustment door. You can see it here.... Edited October 6, 2023 by keiser31 (see edit history) 1 Link to comment Share on other sites More sharing options...
Sasha39 Posted October 6, 2023 Share Posted October 6, 2023 As always John is right, all your Brake Drums should have the same hole, a cover plate sits on top secured by two threaded screws. The holes aline with your eccentric anchor bolts at the bottom. 1 Link to comment Share on other sites More sharing options...
tcslr Posted October 7, 2023 Share Posted October 7, 2023 The door is used to adjust the shoes after relining. As John said. The 75 manual discusses the proper adjustment. It’s easy. These two photos might help. The door is centered over the four 9/16 nuts. Then tightened as a helper applies pressure. Link to comment Share on other sites More sharing options...
lozrocks Posted October 7, 2023 Share Posted October 7, 2023 The 75 doesn't have an eccentric alignment bolt at the bottom. The brake shoes are in two pieces and the adjustment is only made by adjusting the four alignment bolts. Link to comment Share on other sites More sharing options...
BlueDevil Posted October 7, 2023 Author Share Posted October 7, 2023 Thanks everyone. Now I just need to find 4. Jay, where are you? Link to comment Share on other sites More sharing options...
Sasha39 Posted October 8, 2023 Share Posted October 8, 2023 (edited) Thanks for the explanation lozrocks, I didn’t think that the 75 model was that different from the 65 which has a one piece brake shoe, well you learn something new every day. Edited October 8, 2023 by Sasha39 Spelling (see edit history) Link to comment Share on other sites More sharing options...
Narve N Posted October 9, 2023 Share Posted October 9, 2023 Having disassembled three Series 75, I have the understanding that they came both with the strange demountable brake shoes and with the ones cast in one piece (now I know what those four bolts are for). Same goes for drums with or without the access holes, do not believe that they are on all S75 drums (but I will have closer look now). Link to comment Share on other sites More sharing options...
keiser31 Posted October 9, 2023 Share Posted October 9, 2023 10 hours ago, Narve N said: Having disassembled three Series 75, I have the understanding that they came both with the strange demountable brake shoes and with the ones cast in one piece (now I know what those four bolts are for). Same goes for drums with or without the access holes, do not believe that they are on all S75 drums (but I will have closer look now). Some drums have the brake shoe adjusting slot on the edge of the drum. It is for inserting a feeler gauge to adjust the shoes. Link to comment Share on other sites More sharing options...
BlueDevil Posted October 9, 2023 Author Share Posted October 9, 2023 Mine look like this one. Link to comment Share on other sites More sharing options...
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