Guest NZ James Posted March 9, 2012 Share Posted March 9, 2012 Hi, does anyone know the difference between a 1939 Studebaker President brake drum, and a 1940 Studebaker President brake drum? They have different part numbers, but I was wondering if a 1940 drum could be made to fit a 1939? Link to comment Share on other sites More sharing options...
Gary_Ash Posted March 9, 2012 Share Posted March 9, 2012 It does seem strange that the brake shoe set 192671 is listed for 4C-6C (1938-40) while the drums for 5C (1939) are 191692 and 6C-8C (1940-42) are 198039. If the shoes are the same for 1939 and 1940, how different can the drums be?I also wonder how different the President 198039 drums are from the 198038 drums for 1940-42 Commanders. This is the same part number that fits all Studebaker 1/2-ton trucks 1941-64, so these aren't too hard to find. Anyone want to pay the Museum to pull the drawings for the three drums and compare them? Link to comment Share on other sites More sharing options...
studeboy Posted March 9, 2012 Share Posted March 9, 2012 My understanding is the President brake shoes are wider than the Commander shoes to provide greater braking service. The parts catalog notes to use up existing stock of linings for 7A to !0A and 11 A and 12A and then substitute part # 676582 linings for all these commander models. It doesn't mention this for the President linings. Could someone measure the width of a president drum vs a commander. If the two Presidents have the same diameter drums and axle spindle size they will probably interchange. Could just be a design upgrade. Studebaker made quite a few changes in the front suspension between 1939 and 1940. Link to comment Share on other sites More sharing options...
Guest NZ James Posted March 9, 2012 Share Posted March 9, 2012 Hi, thanks for the replies. Which museum, and I'll contact them for drawings? The front and rear hubs on 2?C to 8C don't change either, and the backing plates on the 39 and 40 pres are the same (from memory) along with the shoes so I guess the changes in the drums must be minimal? I've heard a 4e or 5e champ ute drums fit but can't be sure. Link to comment Share on other sites More sharing options...
Gary_Ash Posted March 10, 2012 Share Posted March 10, 2012 (edited) The person to contact is archivist Andy Beckman at the Studebaker National Museum. He is the official keeper of the 70 tons of original factory drawings held by the museum. For a relatively small fee, one of the museum volunteers will search the files for the drawings you want and make paper copies in actual size. Many parts are drawn 1:1. The museum takes credit cards for payment and mails the drawings. They will not provide electronic files, e.g. PDF, in order to limit re-distribution. The income from this service goes to good use at the museum. I have been able to get drawings for parts from the 1920's, don't know how far back they really go. Andy Beckman's email address is abeckman at studebakermuseum dot org. Just give him the part numbers and part names and they will take care of it. Be sure to say what your goal is because they use their experience to suggest related parts. Edited March 10, 2012 by Gary_Ash (see edit history) Link to comment Share on other sites More sharing options...
Guest 38studcom Posted March 10, 2012 Share Posted March 10, 2012 According to the Hollanders Interchange Manual the drums don't interchange but the hubs are the same. Link to comment Share on other sites More sharing options...
studerex Posted March 11, 2012 Share Posted March 11, 2012 I'm not sure of all the differences, but do know the president drums have a larger wheel stud and the shoes are 1/4 wider. You might be able to use a commander drum and drill the stud holes larger and press in your old studs. Link to comment Share on other sites More sharing options...
Guest NZ James Posted March 11, 2012 Share Posted March 11, 2012 Took some photos of the rear drum that is on the car- hopefully they are attached. I can't be sure this is an original, but suppose it is. The drum machining on the inside was 66.3mm wide. Let me know if you need any more dimensions. Regards James. Link to comment Share on other sites More sharing options...
Guest NZ James Posted March 11, 2012 Share Posted March 11, 2012 Regarding the above photos, they came from a 39 President. I have contacted the Museum so will see what drawings they can find. Link to comment Share on other sites More sharing options...
Guest NZ James Posted March 18, 2012 Share Posted March 18, 2012 Have contacted the museum, they are going to look. In the meantime, I sketched up the attached diagram showing main dimensions (hopefully it attached). It looks like it might just be an increased offset on a 1940 drum (in the stamped sheet metal part). So might be able to part off the sheet metal half an inch from the cast, and weld in a 39 hub and sheet metal. Have figured out a way to keep alignment but would be much easier to find a nos drum! Thanks for your comments. James Link to comment Share on other sites More sharing options...
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