Back brake caliper.

Discussion in 'Maintenance' started by Great Guy, Apr 9, 2015.

  1. Great Guy

    Great Guy Well-Known Member

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    I am going to replace this on Sunday. I have got the new crush washers and Dot 4 fluid. When I have removed the rear wheel; do I just remove old caliper by undoing the banjo bolt and bolting the brake line to the new caliper? Sounds quite straight forward.
    Will I now have to bleed the new set up? Does one require a bleed kit or something? Thanks
    NB, I notice Halfords sell a bottle thing for £5... do I need this?
     
  2. TheRamJam

    TheRamJam Well-Known Member

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    Changing the caliper over will involve bleeding the rear brake.
    Its pretty easy to do. I bleed my brakes using the syringe method. Works a treat.
     
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  3. exuptoy

    exuptoy Elite Member

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    x1, get yourself a 50mm syringe and length of clear hose. Open the m/c and syringe off what you can get to, then attach a line to the bleed nipple and pull off the remaining fluid. Once work is complete, refill the m/c from the caliper end and reverse bleed it. Once complete stick the clear tube into a tub of brake fluid and give short pumps to check and expel any further air which may be trapped. Should take no more than an hour all in.
     
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  4. ccr32

    ccr32 Active Member

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    Cracking description - was trying to find the words to sum this method up to a friend recently but failed miserably, so will pass this on!

    In fact, may as well ask while I am here - does this method differ at all if you were doing the same to the front brakes? Is it the same story starting with the furthest caliper first?
     
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  5. exuptoy

    exuptoy Elite Member

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    Yeah, same thing then end up with the m/c I believe.
    A little tip which also makes a big difference, take that syringe and tube, make sure the m/c is full then attach the tube to the caliper or m/c or whatever, put a little tension into the syringe as if trying to pull air then crack of the bleed nipple and if there is any air sitting trapped it will generally be pulled through along with a little fresh fluid. Kept it under tension and lock back up. Gets a nice firm lever. The old trick of tying back the lever to the bar overnight with a tie wrap is a good one too.
     
  6. Great Guy

    Great Guy Well-Known Member

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    Got a one way valve tube thing from the local car bits shop. I will do the job on Sunday. It looks quite straight forward, famous last words. One just clips the device on the bleed nipple and pump the liquid through until there are no air bubbles . I am correct?
     
  7. exuptoy

    exuptoy Elite Member

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    Yep. You can also buy speed bleeders which you change out the bleed nipple for. Basically one way nipples. Oooer I said nipples:D
     
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