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Technical How to check and level backing plate shoe pads

Discussion in 'The Hokey Ass Message Board' started by Andy, Sep 13, 2025.

  1. Andy
    Joined: Nov 17, 2002
    Posts: 5,372

    Andy
    Member

    I while back my roadster needed new brakes. I found that the pads on the backing plates were worn. I figured I would just level them off. How hard could that be? The car would not stop worth a darn. I bought new shoes and drums. I desided to see if the grinding job was accurate It was not. The wear on the shoes gave it away. The wear was slanted.
    I took a piece of scrap and drilled some holes in it so it would fit over a stud and a bolt could go thru on the other end. I swung it around and found the lowest pads and ground the high ones to match. I used a 1/4-20 bolt. A quarter turn moves the bolt is .0125". I found you can judge contact by the sound of the bolt dragging over the pad.
    I checked the shoes and they measured great.
    PS, I used my 4" grinder with a worn down wheel.
    IMG_3679.jpeg IMG_3680.jpeg IMG_3681.jpeg .
     
    Last edited: Sep 13, 2025
  2. Mr48chev
    Joined: Dec 28, 2007
    Posts: 35,767

    Mr48chev
    ALLIANCE MEMBER

    That gets a "why the hell didn't it think of that 50 years ago when I was doing as many as 20 brake jobs a week." . That is the HAMB home made tool of the year.
     
    Hotrodmyk, Andy and ydopen like this.
  3. Dave G in Gansevoort
    Joined: Mar 28, 2019
    Posts: 3,603

    Dave G in Gansevoort
    Member
    from Upstate NY

    Yup, that’s the epitome of KISS! Hand to smack forehead…
     
    seb fontana likes this.
  4. SS327
    Joined: Sep 11, 2017
    Posts: 3,741

    SS327

    I always welded them back up when they got grooved.
     
  5. Onemansjunk
    Joined: Nov 30, 2008
    Posts: 517

    Onemansjunk
    Member
    from Modesto,CA

    D583F12C-D962-42DC-BBE6-80A69F8BAA57.jpeg 70096908-C406-4159-9100-C53A31F6E9F3.jpeg You did good Andy. We’ll all use your technique from now on. First pass on a pair I was working on.
     
  6. RodStRace
    Joined: Dec 7, 2007
    Posts: 8,219

    RodStRace
    Member

    Good description, great pictures, smart and cheap!
     
    SS327 and Andy like this.
  7. ClayMart
    Joined: Oct 26, 2007
    Posts: 7,718

    ClayMart
    Member

    A simple to make and easy to use tool. An elegant solution. ;)

    Maybe a good time to also check end play and runout of the axle flange?
     
    SS327, Toms Dogs, Andy and 1 other person like this.
  8. Andy
    Joined: Nov 17, 2002
    Posts: 5,372

    Andy
    Member

    I took your advice. The flanges run dead on. No axial play in the axles
    My new drums are out of round. Bummer. Maybe turn them or buy others.
     
    SS327, ClayMart and deathrowdave like this.
  9. RodStRace
    Joined: Dec 7, 2007
    Posts: 8,219

    RodStRace
    Member

    Obviously this may not apply, but if NEW can you take them back? I remember a rash of bad drums back in the 90s. Turns out, they had been stacked too high in the boat. :(
    The local store went through a pallet load by the time it was over. Times that by all the other stores. :mad:
    I don't know who the WD was, but that was a nightmare for them. After the manager came out to see a new out of box one he brought get chucked up in the lathe, our return policy was heavily relaxed for a while. :rolleyes:

    BTW, all modern stuff for a long time has been 0.060" max cut. If they are under, you can try to cut them. If over that, they are fresh scrap.
     
    SS327 likes this.

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