brakes not working properly?

Question

i have a mk6 '97 ford escort non - abs model. The n/s/f caliper works fine, but the o/s/f does not apply the same pressure and if i brake hard it sticks on. I have taken that caliper apart and the piston seems fine, however i cannot push the piston back in unless the bleed nipple is loosened. I have been told it may be the master cylinder, is this the most likely fault?

Answer 1

I would say you have an internally collapsed rubber brake hose. It happens and its an easy fix. I say this because you say you can retract the piston with the nipple open but not with it closed.

Take the bull by the horns and renew the rubber flexi hose as a starting point.

Cheers

Geordie

Answer 2

If you can release the pressure at the bleeder and push the piston in then it is not the caliper , I would assume it is most likely the rubber brake line connecting the caliper to the frame mounted metal line , they are inexpensive under 20$ I would change that first and if you still have the problem it can only be the master cylinder or distribution block if equiped with one (which I am pretty sure that model has more or less a spliter that tries to equalize pressure from LF to RF only).
Usually when a master cylinder goes bad it will either fight back at you when you press the pedal or the pedal will fade and feel like there is no fluid

Answer 3

It takes very little for a close tolerance brake piston to become jammed in the cylinder.
I know you state that it seems clean, however, before going to too much expense or assuming the worst, I would get hold of some P600 wet and dry paper and using brake fluid as a medium, proceed to polish the caliper piston and the inside of the cylinder.
Remember when finished to remove all traces and completely flush the cylinder before attempting to refit.
If the problem still persists, fit the nsf caliper to the osf supply pipe. It does not have to be fitted in position but you will need a wooden block to place between the caliper to simulate the brake disc.
If you have the same problem using the nsf disc then I would say, yes, the master cylinder has a fault.

Regards

Answer 4

If the vehicle has been sitting for some days fantastically contained in the wintry climate months the brakes disks do oxidise or rust. once you stress after this era the disks will make a mild noise because the pads relax very gently on the disk. How ever reckoning on the variety of wheels you've you ever can visually see for your self. If the pads are low it may reason an identical issue yet you could also experience the grinding through the brake pedal once you practice the brakes. maximum places do a loose brake inspection yet you are able to be more suitable positive off with some one you think to envision them out as allot of garages do artwork the position it isn't needed.

Answer 5

Its the caliper, 100% youd know if it was master , pump the brake up till its rock hard. then keep your foot firm on the brake and fire it up. if the pedal creeps to the floor, the master is goosed, if not then its the cylinder.

Answer 6

jack the wheel up and press the brake very hard, take your foot of the brake and you say the wheel is locked tight, crack open the bleed nipple and if the wheel turn freely suspect the flexy hose if its still tight its the calliper at fault.

Answer 7

sometimes its the hose blocking,the inner colapses blocking the hose,rob

Answer 8

it is your Master cylinder i've no doubt

Answer 9

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