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Car Forum / MINI / July 2006Mini Front Brakes not working - help / ideas needed!!
I'm working on an '89 Mini - the brakes are dual circuit front/rear. The master cylinder, pipes and calipers have been replaced all round. Having bled the front and rear circuits, the rear brakes are working fine. However the front brakes do not work. Bleeding them again and again makes no improvement although they do come on slightly when pumping the pedal. Everything has been checked again and again and I am pulling my hair out!! Has anyone got any ideas. > I'm working on an '89 Mini - the brakes are dual circuit front/rear. > The master cylinder, pipes and calipers have been replaced all round. [quoted text clipped - 4 lines] > pumping the pedal. Everything has been checked again and again and I am > pulling my hair out!! Has anyone got any ideas. you tried bleeding the master cylinder ? get an assistant sat in the car, undo all the pipes to the master cyl and get the assistant to push the foot brake down once, fluid should come out, do all the pipes up, then let the foot brake up, repeat this a few times and see if that makes any difference. >>I'm working on an '89 Mini - the brakes are dual circuit front/rear. >>The master cylinder, pipes and calipers have been replaced all round. [quoted text clipped - 9 lines] > brake down once, fluid should come out, do all the pipes up, then let the > foot brake up, repeat this a few times and see if that makes any difference. Usually the top pipe has the air. One question was the MC overhauled? or a new one? If it was OH then the springs could be in the wrong way. >>> I'm working on an '89 Mini - the brakes are dual circuit front/rear. >>> The master cylinder, pipes and calipers have been replaced all round. [quoted text clipped - 15 lines] > One question was the MC overhauled? or a new one? If it was OH > then the springs could be in the wrong way. Only other thing I can add is if the front calipers are 4 pots, check the bleed nipples on the wheel side of the caliper. The other trick to try is when bleeding tap the pedal a few times quickly and then stamp it to the floor, this can help removing the air that can get trapped in the master cylinder. -anthony Have you checked the Brake Valve thingy mounted on the bulkhead (all the brake lines run off it), just below the brake servo, as that can cause problems if it needs changing? I know many people have fitted brake bias valves instead. Taffy Clamp off the two front brake flex hoses with mole grips, try the pedal, if its improved, then the master cylinder and all the brake pipes are ok, so the fault must be with one or both callipers, release the clamps, one at a time and monitor the pedal travel, the calliper that causes excessive travel is the culprit, this is just a quick way to reduce the search area, IT IS HIGHLY RECOMMENDED THAT YOU DO NOT DRIVE THE CAR WITH CLAMPS ON FRONT BRAKE FLEX HOSES, ;-) Fitzy > Have you checked the Brake Valve thingy mounted on the bulkhead (all > the brake lines run off it), just below the brake servo, as that can [quoted text clipped - 3 lines] > > Taffy > Clamp off the two front brake flex hoses with mole grips, > try the pedal, if its improved, then the master cylinder and all the brake [quoted text clipped - 14 lines] > > > > Taffy My apologies to all for your help. I fitted the lh caliper to the rh and the rh to left hand ------result bleed nipples below and nice cavity above that cannot be bled my aonly excuse was the box said l/h when was right hand Ed > Clamp off the two front brake flex hoses with mole grips, > try the pedal, if its improved, then the master cylinder and all the brake [quoted text clipped - 14 lines] > > > > Taffy Nice one rock steady eddie ;-) Glad you sorted it out mate, Fitzy > My apologies to all for your help. > [quoted text clipped - 25 lines] >> > >> > Taffy > My apologies to all for your help. Pardon? > I fitted the lh caliper to the rh and the rh to left hand ------result > bleed nipples below and nice cavity above that cannot be bled my aonly > excuse was the box said l/h when was right hand <rolls eyes> Still, it explains the top-posting. Don't roll your eyes, they might stick. By the way, top posting is not a crime. >>My apologies to all for your help. > [quoted text clipped - 7 lines] > > Still, it explains the top-posting. i believe top posting should now become the standard, with most poeple on a decent connection and the servers holding more information. top posting removes the need for endless scrolling through long messages with hundreds of > >> >>>> >>>>>> >> > > > >> >>>>>>>>>>> arrows. > Don't roll your eyes, they might stick. By the way, top posting is not a > crime. [quoted text clipped - 10 lines] >> >> Still, it explains the top-posting. > Don't roll your eyes, they might stick. By the way, top posting is not a > crime. I thought inciting murder _was_ a crime?  SignatureDavid Taylor >>Don't roll your eyes, they might stick. By the way, top posting is not a >>crime. > > I thought inciting murder _was_ a crime? What? > My apologies to all for your help. > [quoted text clipped - 3 lines] > > Ed Thanks for being honest enough to let the NG know. Chris SignatureRemove prejudice to reply. |
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