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Thread: What causes L and R rear disc brakes to brake unevenly?

  1. #31
    Super Grandmaster
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    Quote Originally Posted by Sinbad View Post
    I still reckon the caliper is sticky on its pins, resulting in it not exerting force on both sides of the disc.
    You are right. That's exactly what it is was.

    The caliper pins were gummed up, so LR caliper sticking.

    The previous pad-replacer used a crappy cheap grease which had turned to goo, so no movement. Really battled to get the caliper pins out, cleaned them up, cleaned the holes/channels/guides, lubed with decent synthetic grease, replaced, and voila!

    Car sailed through roadworthy.

    There's still a diffs between LR and RR. Expect it to take a while for the bad-caliper pads to bed in properly, so I expect the brake force to equalise with some use.


    The little Hundy is seldom used, which is part of the problem. I dug up the receipt for the pads replacement last year, where I noted the odometer reading. It's done only 1150km in the 8 months since.

    Resolution: The machine needs some exercise. And clean the RR caliper pins - the same grease was probably used there.

  2. #32
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    Ok here is the Fix
    * Take the pads out. Clean the callipers with a brake cleaner and then lube the retainer pins and slides with copper compound.
    * Flush the brake fluid. They need to be replaced once a year as they are hydroscopic (attract water) that turns to steam when brakes are hot and causes uneven braking and or soft brakes.
    * Be sure to bleed any air out the system.

    when done go to a quite road. Drive at a 100 kmh and brake very hard to about 20 kmh. don't come to a standstill. do this 10 times.
    You need the pads to be bedded with pad transfer to disk. then drive for about 10 minutes to cool the brakes.

    done

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