Author Topic: Front brake piston service  (Read 880 times)

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Offlinesimbo

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    Re: Front brake piston service
    « Reply #15 on: 2018-05-30 19:20:34 »
    Been having a problem with the front brakes binding on a 2012 TC with 23,000 miles on the clock. The bike isn't ridden in the winter & the calipers/pistons are cleaned & exercised every year or when the tyres are changed around 5,500 miles. If necessary, AJ's have offered to replace the pistons & seals for an hours labour (circa £100),plus two repair kits at £77.27 each. Have managed to free off the pistons, will see how the brakes perform over the weekend & take it from there.

    Are these isolated issues or more common than reported on here?


    Hi David, it'll probably be dried up dust seals, next time you have them off clean the piston with brake & clutch cleaner and give it a coating of red rubber grease, it should prevent any further binding.
    2011 BMW R1200RT, 2015 H-D StreetBob SE, 2016 Suzuki VanVan, 2003 GasGas 200TXT Pro, 2007 V-Strom 650..

    Offlinegeordielad

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      Re: Front brake piston service
      « Reply #16 on: 2018-05-31 09:18:57 »
      If necessary, AJ's have offered to replace the pistons & seals for an hours labour (circa £100 ):beee:
      Am I out of touch with technician rates? £100/hr.?
      Don't ask the question if you don't want to hear the answer!

      OnlineDavid.

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        Re: Front brake piston service
        « Reply #17 on: 2018-06-18 16:36:22 »
        Took the calipers off again today, exercised the pistons & applied a little red rubber grease. All pistons can be pushed back by hand without removing the fluid reservoir cap.

        Can't see what else can be done to improve the situation.
        « Last Edit: 2018-06-18 19:01:03 by David. »

        Offlinesimbo

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          Re: Front brake piston service
          « Reply #18 on: 2018-06-20 21:15:50 »
          Took the calipers off again today, exercised the pistons & applied a little red rubber grease. All pistons can be pushed back by hand without removing the fluid reservoir cap.

          Can't see what else can be done to improve the situation.


          Are they still binding?
          2011 BMW R1200RT, 2015 H-D StreetBob SE, 2016 Suzuki VanVan, 2003 GasGas 200TXT Pro, 2007 V-Strom 650..

          OnlineDavid.

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            Re: Front brake piston service
            « Reply #19 on: 2018-07-09 19:42:19 »
            Are they still binding?

            Yes, I'm still not happy with the brakes binding. Once again, today I removed the pads, cleaned & exercised the pistons. With the pistons extended out beyond their normal operating limit, all but one of eight can be pushed back by hand. In two weeks time, the bike is booked in to Cooper Sunderland for them to diagnose the problem with a view to a potential warranty claim. (Seized callipers due to corrosion are not covered). As I cannot see any external corrosion, I'm hopeful that BMW will pay for any fix, less my £100 excess.

            I'll update with any further progress as it happens.

            OnlineSullivj

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              Re: Front brake piston service
              « Reply #20 on: 2018-07-09 23:04:15 »
              I wonder if the problem exists in the resovoir and not the calliper.


              It will be interesting to see what BMW have to say.