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Bonded brake lining failure

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  • Bonded brake lining failure

    Took the wife's car for MoT today, a 2006 Proton Savvy with 33k miles on the clock. Passed MoT OK with a advise of slightly binding rear brake.
    Got it home and took off side brake drum off, all seemed ok until I touched a brake lining and it fell off the shoe. The bonding had failed, took off near side drum and again found one of the linings also about to part company with the shoe. So a new set of shoes, and front pads fitted.
    I must admit that I have always been skeptical of bonded shoes, never happened with the riveted ones, could have caused a serious accident.
    Last edited by John Wakefield; 08/03/2018, 12:43 PM.

  • #2
    She's been practicing her handbrake turns again! I had a shoe adjuster retaining spring come loose as aI braked for the lights at the A40 on the way home one afternoon. It made a fair noise, so I quickly found a side road and refitted it, luckily I had the big socket for the hub nut......Stupid idea not being trusted to adjust them yourself.

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    • #3
      Bonded brake shoes.

      Hi, recently had the same problem with my twin axle Ifor Williams plant trailer, same problem, binding brake,so took off wheel and drum,one lining fell out and the other came off in my hand,checked other three drums ,all the same.Cured with 4 new sets. I have come across this before,I think age has a lot to do with this problem..................starider

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      • #4
        PS

        Had all sorts of brake problems when working in the motor trade in the 60s and 70s. Had a chap in one day with an Austin 1100,he complained it wouldn't go above 30mph.I went out to have a look and smoke was coming from the front N/S wheel and the paint was blistering on the wheel.Got it into the workshop jacked up the front,the wheel was locked solid.Let the wheel cool down for about half an hour then took it off.Both pads had worn down so far that they were thin enough for the metal part of the pads to jamb between the caliper and the disc!! The owner said he had heard a funny noise from the front for several weeks!?!........starider

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        • #5
          I have seen this on disc pads and brake shoes, usually on old vehicles with low mileage left standing for long periods. Oxidation on alloy or rust on steel the result is the same, forcing the lining off the backing material. Even had one where to remove the brake backplate on a C90 took some time, eventually when it came off the lining was still stuck to the drum. We're the shoes original? At 2500 miles a year I would not be surprised, and I hope you changed the brakes all round. Not unusual either to find brake fluid not changed for years on low mileage bikes and cars. Dogsbody

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          • #6
            Originally posted by Dogsbody View Post
            I have seen this on disc pads and brake shoes, usually on old vehicles with low mileage left standing for long periods. Oxidation on alloy or rust on steel the result is the same, forcing the lining off the backing material. Even had one where to remove the brake backplate on a C90 took some time, eventually when it came off the lining was still stuck to the drum. We're the shoes original? At 2500 miles a year I would not be surprised, and I hope you changed the brakes all round. Not unusual either to find brake fluid not changed for years on low mileage bikes and cars. Dogsbody
            Yes original fitment we had car from new. Front pads also lifting so also replaced. First time I have come across this, but as you note car does not get a lot of use.
            Attached Files
            Last edited by John Wakefield; 08/03/2018, 12:44 PM. Reason: Pic added

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            • #7
              It’s a problem for volvo v70 xc 70 with their hand brake they become detached and it can be costly.the volvo. Handbrake Shoes are the sam as reliant three wheeler main brakes.

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              • #8
                Bonded brake shoes/pads

                Yup, did all the brakes on the 1100 including new calipers and discs[the seals had melted on the N/S] and N/S disc had worn too thin!! I never ever try to save on brakes of any sort,if in any doubt I replace,whatever the cost.....................starider.

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                • #9
                  I had the newly replaced linings come off the shoes on the Oldani front brake on the Silverstone some years ago. The racing brake specialist told me that riveting was old tech and bonding was the way to go. The first or second time I rode the bike the front brake locked on and on disassembly found the linings no longer attached to the shoes.

                  Found out that bonding does not work with magnesium shoes!

                  I salvaged the weekend by driving the 120 miles home on the Saturday evening, riveting the linings back onto the shoes and returning to the track for the Sunday Final race.

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                  • #10
                    It sounds like you were lucky to be able to drive home! I hope you "advised" the specialist afterwards!
                    I was lucky enough to visit the Met Police's Hendon Driving School many years ago and the tour included a visit to the Black Museum, a collection of dodgy components taken from vehicles that had been in serious accidents. There were several brake related exhibits including a lovely recreation of a brake shoe made of wood and several examples of linings detached, well detached to the point of total invisibility!

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