brakes keep locking

[benniepak]

 log1call said:

Benniepak... What have you found?

hey i did what you said to do and yup it did free up...jammed it, tried driving it would move so i broke the bleed nipple and it freed up...only a bit though and just wanted to ask if i change the hose will it free up completely??? coz its still not spinning freely

also how do i replace the hose???

[log1call]

To test if it's the hose or back nearer the master cylinder.... pump the brakes and check the wheel is locked, loosen the coupling where the steel pipe meets the top/body end of the hose till fluid comes out, see if the wheel is free. If the wheel isn't free then, then loosen the bleed nipple and if the wheel comes free then it is definatly the rubber hose. Take the hose off and try blowing through it with your mouth... it will be blocked. If loosening the top of the rubber hose did free the wheel then there is a blockage nearer the master cylinder, not in the rubber hose, so trace the pipe back loosening every join in turn testing which ones let the wheel free and which ones don't. You will need to re-jam the brakes between tries. If it's the rubber hose get a new one and fit it then bleed the brakes. It's fairly common for brakes to drag a little when you test them with your hand. The pistons get pushed out by hundreds of pounds of pressure and as they move they distort the rubber O-ring seal, the only thing that makes the piston return is the rubber returning to it's normal shape and it only moves a fraction of a mill, so a bit of rubbing is normal. Once you drive the car the tiny bit of play in the wheel bearings will push the pads and cylinder back a fraction further. .

[benniepak]

 log1call said:

To test if it's the hose or back nearer the master cylinder.... pump the brakes and check the wheel is locked, loosen the coupling where the steel pipe meets the top/body end of the hose till fluid comes out, see if the wheel is free. If the wheel isn't free then, then loosen the bleed nipple and if the wheel comes free then it is definatly the rubber hose. Take the hose off and try blowing through it with your mouth... it will be blocked. If loosening the top of the rubber hose did free the wheel then there is a blockage nearer the master cylinder, not in the rubber hose, so trace the pipe back loosening every join in turn testing which ones let the wheel free and which ones don't. You will need to re-jam the brakes between tries. If it's the rubber hose get a new one and fit it then bleed the brakes. It's fairly common for brakes to drag a little when you test them with your hand. The pistons get pushed out by hundreds of pounds of pressure and as they move they distort the rubber O-ring seal, the only thing that makes the piston return is the rubber returning to it's normal shape and it only moves a fraction of a mill, so a bit of rubbing is normal. Once you drive the car the tiny bit of play in the wheel bearings will push the pads and cylinder back a fraction further. .

brakes working fine now thanks to you guys...hose was blocked...(i think) lol coz before i took it off it was moving even after i locked them up but it dont lock no more