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EFV-8 Club Forum / General Ford Discussion / Brake question

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Posted By Discussion Topic: Brake question -- page: 1 2     supereal 01-07-2017 @ 1:42 PM reply profile send p.m. Senior Posts: 6819 Joined: Oct 2009 We used a method to find the high spot on the lining. We coated the surface of the lining with the chalk used by carpenters to coat snap strings. Install the hub and drum and have a helper work the brake pedal until you can just turn the drum. Remove the hub and drum and observe the chalk. High spots will be shown as places that the chalk was rubbed off. We used a belt sander, but be careful to remove only small portions before repeating the process. This message was edited by supereal on 1-18-17 @ 11:49 AM 46coupe 01-04-2017 @ 12:06 PM reply profile send p.m. Member Posts: 273 Joined: Oct 2015 Thanks for the response. I'll check around with some of the guys in the club. As of now, I put the drum on, compress the shoes all the way in and they still rub. I've sanded leading and trailing edges and where I see rub marks. Not much has helped. I thought the shoes were binding on the back plate so greased the areas where the shoes rubbed. Helped a little. Spring appears to be ok. Cams are working ok. Shoe alignment seems ok, just too much shoe for the drum. I hesitate sanding the shoes any more. Probably will check on arcing the shoes when I return home. Have a great weekend. CharlieStephens 01-03-2017 @ 2:29 PM reply profile send p.m. Senior Posts: 894 Joined: Oct 2009 "What is the procedure for arcing the brake shoes? If needed, I will have to explain to the person doing the job, unless he's old like me? I've never heard of doing this. Every drum brake car I've owned I'd buy the shoes, put them on and they worked, even when I put new drums on. This is the first time I've had so much trouble with new parts and it all started when I went to replace the front wheel bearings:) Too long a story to relate here." There is a machine especially to grind the shoes into the correct shape to mate completely with the drum. These machines produce a lot of dust and the machines need be be modified to catch the dust. This modification is expensive and most shops just got rid of the machines since almost all of the cars today have disc brakes. Most shops today just let you drive with substandard brakes until the shoes wear in. Ask around local clubs to see if anyone has a machine. Charlie Stephens This message was edited by CharlieStephens on 1-3-17 @ 4:04 PM 46coupe 01-03-2017 @ 1:29 PM reply profile send p.m. Member Posts: 273 Joined: Oct 2015 Update: Took the drum to a parts store here and had the drum checked for trueness and hi/low spots. There were 3 high spots found on the drum that I was told were cast into the drum. Drum was turned to eliminate high areas. I just tried the drum and no hi places. I'll adjust the shoes when I have some more time. Should this new drum have come this way? Should I expect to have the next drums I buy checked and turned down like this one was? 46coupe 01-02-2017 @ 1:48 PM reply profile send p.m. Member Posts: 273 Joined: Oct 2015 What is the procedure for arcing the brake shoes? If needed, I will have to explain to the person doing the job, unless he's old like me? I've never heard of doing this. Every drum brake car I've owned I'd buy the shoes, put them on and they worked, even when I put new drums on. This is the first time I've had so much trouble with new parts and it all started when I went to replace the front wheel bearings:) Too long a story to relate here. CharlieStephens 12-31-2016 @ 1:16 PM reply profile send p.m. Senior Posts: 894 Joined: Oct 2009 When you have the drums turned be sure it is only a clean up cut. Don't let them turn it to match oversize shoes (if that is your problem), have the shoes arced. Charlie Stephens This message was edited by CharlieStephens on 12-31-16 @ 3:52 PM 46coupe 12-31-2016 @ 9:48 AM reply profile send p.m. Member Posts: 273 Joined: Oct 2015 I filed/sanded both ends of both shoes. Not much help. Drum spins when the shoes are closed all the way until they hit a high spot or spots. I'm having the drum checked and turned as suggested. Happens on Tuesday. I'll let you all know how it turns out, (pardon the pun) Happy New Year to everyone. I'll update my profile as well. Live in Tenn. trjford8 12-29-2016 @ 3:47 PM reply profile send p.m. Senior Posts: 4232 Joined: Oct 2009 I usually file the top and bottom edges of new shoes at approximately a 30 degree angle. That should help. CharlieStephens 12-29-2016 @ 1:29 PM reply profile send p.m. Senior Posts: 894 Joined: Oct 2009 It is possible that the drum was intentionally undersize to allow a clean up cut after it was installed so a clean up cut wouldn't hurt. Have you measured the drum diameter? If you added your general location to your profile someone might suggest a location to have the shoes arced if you need that service. Going from an oversized drum (which is I assume why you replaced it) to a new drum should require arcing. Charlie Stephens 46coupe 12-29-2016 @ 8:20 AM reply profile send p.m. Member Posts: 273 Joined: Oct 2015 Thanks. I was going to ask about sanding the shoes and forgot. I'll try doing that which would be easier.

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