tom1361 Posted December 16, 2017 Share Posted December 16, 2017 hello everyone, went to put my spokes and drums on today and they won't go on. they hang up on the new linings. brake cans and slack adjusters aren't on yet. s cams are sitting nice and flat as well as the wear pads on the shoes. my first question is why would the rebuilder put one layer of roofing paper [tar paper] under the shoe? now if i take the linings off and remove that paper the drums will slide on nicely. second question is when and if i remove the linings is there a proper way to put them back on, ie:: tightening sequence and torque specs?? i would be thankful for any help..... tom vb. Quote Link to comment https://www.bigmacktrucks.com/topic/51967-question-about-my-rear-brake-shoes/ Share on other sites More sharing options...
theakerstwo Posted December 16, 2017 Share Posted December 16, 2017 That is a spacer to make the lining fit a over size drum. 2 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/51967-question-about-my-rear-brake-shoes/#findComment-387542 Share on other sites More sharing options...
tom1361 Posted December 16, 2017 Author Share Posted December 16, 2017 i don't have over sized drums. i have standard brand new drums that i bought from allentown mack. [trans edge]. i'm guessing that means i can remove it and re torque the linings? if so what is the proper way to do so? Quote Link to comment https://www.bigmacktrucks.com/topic/51967-question-about-my-rear-brake-shoes/#findComment-387549 Share on other sites More sharing options...
j hancock Posted December 16, 2017 Share Posted December 16, 2017 R and R. Torque 1/4" 7 lbs., 5/16" 15 lbs. 1 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/51967-question-about-my-rear-brake-shoes/#findComment-387572 Share on other sites More sharing options...
tom1361 Posted December 16, 2017 Author Share Posted December 16, 2017 thank you for your help. that's simple enough. i'll take care of it today. Quote Link to comment https://www.bigmacktrucks.com/topic/51967-question-about-my-rear-brake-shoes/#findComment-387577 Share on other sites More sharing options...
h67st Posted December 16, 2017 Share Posted December 16, 2017 Who relined your shoes? I'm eventually going to have to have that done. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/51967-question-about-my-rear-brake-shoes/#findComment-387579 Share on other sites More sharing options...
Swishy Posted December 16, 2017 Share Posted December 16, 2017 Q:? Are both linings Identical? .........or do they have a leading (thicker) n trailing (thinner) edge? Thicker edge to CamShaft .......... Thinner edge to anchor pin Torque ........ Check the torque to undo the nuts Never ever tried roofing tar paper ........... we use the engine manifold type cardboard gasket material Twould imagine tar if got hot could smoke n smell n may B settle the lining in further till the tar cooled n acted like glu Butt wadda eye kno ......... probly SFA Your Welcome LOL cya §wishy 1 Quote Link to comment https://www.bigmacktrucks.com/topic/51967-question-about-my-rear-brake-shoes/#findComment-387586 Share on other sites More sharing options...
topo Posted December 16, 2017 Share Posted December 16, 2017 I think the brass bolts are a one time use only they will go on but strip when backed off . years back when bolting on pads the small bolts would self strip the 3/8 or 7/16 bolts on the MACK and Rockwell axles where just broken off with a cross pin hammer. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/51967-question-about-my-rear-brake-shoes/#findComment-387593 Share on other sites More sharing options...
Popular Post BC Mack Posted December 16, 2017 Popular Post Share Posted December 16, 2017 take them back to your brake supplier with the drum mounted on the hub and have them machine the shoe to match the drum profile, but give 0.010" clearance to wiggle the drum on... shoes with rollers can have up to four sizes of roller, max oversize of drum is cast in the drum info, and shoes can come as std, X or XX.... most common size I use in 14.5 and drums can wear up to 14.833 before scrap. unless you are putting on new drums with new shoes and linings (which is now recommended given the crap drums out of China) you need to have machining done to give 100% contact from day one, otherwise you will only have a small contact area until the linings wear down some. BC Mack 4 Quote Link to comment https://www.bigmacktrucks.com/topic/51967-question-about-my-rear-brake-shoes/#findComment-387600 Share on other sites More sharing options...
Popular Post 39 Baby Mack Posted December 17, 2017 Popular Post Share Posted December 17, 2017 I'd just remove and replace them without the spacer, as Glenn mentioned above, that was done for oversize drums. The brake bolts should come apart and be able to be reused, the 7" shoes used on your truck have 3/8" bolts in them. Just tighten them up from the center out and use some common sense. Ron 3 Quote Link to comment https://www.bigmacktrucks.com/topic/51967-question-about-my-rear-brake-shoes/#findComment-387658 Share on other sites More sharing options...
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