uneven rear pad wear and which way round does the pad spring go?



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Thread: uneven rear pad wear and which way round does the pad spring go?

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    Austin's Avatar
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    uneven rear pad wear and which way round does the pad spring go?

    The rear brake pads on my TA have worn unevenly, and I mean very unevenly. The piston side is nearly worn out, the sliding side is barely worn at all. Pads have done an awful lot miles getting on for 50,000 (the first set did over 50K and still had meat on them when repalced with this set). I have noticed before and stripped and greased up pins and it all slides nicely but nothing seems to make a difference. The only thing I can think is that I have unwittingly got the pad spring in wrongly or something else is preventing the caliper sliding and the pad engaging with the disk properly, although after compressing the piston back in I can see the caliper sliding as the pedal is pumped so it seems to be all working OK.

    I am about the replace the pads and would like to fit properly and fix this once and for all. Note, the brake feels like it is working fine and will lock up the wheel with a heavy foot, but there is pulsing feeling under a light load which I can imagine is consistent with one pad pressing on the disk. I am baffled.

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    T ALP is offline Senior Member
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    Re: uneven rear pad wear and which way round does the pad spring go?

    but there is pulsing feeling under a light load which I can imagine is consistent with one pad pressing on the disk. I am baffled.[/QUOTE]

    Had no problems with my callipers to date so I will let someone else answer the main part, Re. the pulse -- the only time Iv'e ever felt that is when a disc is warped and that might account for the fact you can lock the back wheel.

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    Re: uneven rear pad wear and which way round does the pad spring go?

    Quote Originally Posted by T ALP View Post
    but there is pulsing feeling under a light load which I can imagine is consistent with one pad pressing on the disk. I am baffled.
    Had no problems with my callipers to date so I will let someone else answer the main part, Re. the pulse -- the only time Iv'e ever felt that is when a disc is warped and that might account for the fact you can lock the back wheel.[/QUOTE] [/QUOTE]


    nope, the disk isnt warped.

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    Re: uneven rear pad wear and which way round does the pad spring go?

    It's dark out at the moment and I've not light in the shed, but I'll check on my pad spring orientation for you tomorrow. Caliper off as I've just put the swingarm back in.

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    Re: uneven rear pad wear and which way round does the pad spring go?

    Sorry I carn't be more help -- trouble is in 18,000 miles Iv'e had no reason to do anything except service it!
    Once had a CB750 with a swinging front calliper the brake was binding ever so slightly turned out the square section piston seal had gone paralelalgram shape new seal job done.

    Re. warped discs --- just a few thou. showing on a dial indicater and you will feel a pulse.

    Anyway best of luck fixing it.

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    Re: uneven rear pad wear and which way round does the pad spring go?

    Quote Originally Posted by Lutin View Post
    It's dark out at the moment and I've not light in the shed, but I'll check on my pad spring orientation for you tomorrow. Caliper off as I've just put the swingarm back in.
    Thanks Tony, a close up photo of the pad spring would be helpful too. As you know, the srping has various tabs and tangs and one of mine has a small tab bent in a way that looks like it might be stopping the caliper move once the pad is touching the disk, although I would have thought the forces involved would easily reshape the thin spring.

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    Re: uneven rear pad wear and which way round does the pad spring go?

    Quote Originally Posted by Austin View Post
    a close up photo of the pad spring would be helpful too.
    I'll definitely need daylight then.

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    Re: uneven rear pad wear and which way round does the pad spring go?

    I can't see that there is that much of a problem Austin if you are getting 50k from a set of pads - you have answered the main thing & that's the fact that the caliper slides freely (have you tried it without pads fitted?).

    I don't have a picture but if you look at the pad spring one side has a small folded over lug - this lug keeps the static pad in place ie not the pad that the piston pushes.

    Phil

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    Re: uneven rear pad wear and which way round does the pad spring go?

    Quote Originally Posted by piguglyshandydrinker View Post
    I can't see that there is that much of a problem Austin if you are getting 50k from a set of pads - you have answered the main thing & that's the fact that the caliper slides freely (have you tried it without pads fitted?).
    Phil
    Oo take care if doing that. Without the pads fitted you may well pop the piston right out.
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    Re: uneven rear pad wear and which way round does the pad spring go?

    Reality check on who you buy your pads from, right there. My EBC rear pads lasted 4.5k (had to fit them as needed for MOT and DS wouldn't deliver fast enough)

    Expect a bit of mismatch (piston side worn more than non-piston side), but as long as the calliper slides freely on the pins there's no problem.

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