another braking problem!!!

here we go again ......

noticed lately the brakes on the disco aint quite what they should be, they dont 'bite' like they used to and sometimes the pedal is hard and i stop quickly but other times the pedal can sink towards the floor and it takes longer for me to stop. when the pedal is pressed the car doesnt pull to either side or anything like that so i think i can rule out knackered calipers. and i do have a leaking swivel ball on the front passenger side which is spilling some grease out (which is getting fixed next weekend), but i cant see that affecting all 4 discs and it wouldnt affect the pedal travel. i bled the brakes earlier in the week and no air at all came out, and all unions on the brake pipes are tight with no apparent leaks or air ingress.

anybody got any ideas on what the problem could be? im planning on putting 4 new discs on when i do the swivel balls so if i can sort all the problems out in 1 go it'll make my life ALOT easier!!

cheers guys

make sure the brake fluid level is ok then suspect Master cylinder seals?

allo Mr Red

fluid level is bang on the line and it hasnt lost any in the 6 months ive had it.

is the master cylinder rebuildable or am i better off getting a new 1??

Mark Disco said:

allo Mr Red

fluid level is bang on the line and it hasnt lost any in the 6 months ive had it.

is the master cylinder rebuildable or am i better off getting a new 1??

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Yu can buy a replacement seal kit for em. Check all ya brakes & Lines for leaks 1st though obviously

just noticed yu already checked for leaks.

il add a seal kit to me list of bits i need

cheers mate

I had similar, turned out to be rear offside caliper, one of the pistons was dead .. corroded, stuck but I assume occasionally would come out to play and stop like a brake should .. Most times it wouldn't .. Couldn't see the problem until I took the pads out complately.

Cylinder replacement seals and piston kit worked wonders.

However, it's grooved the disc and pad, so sometime during winter I'm going to replace rear discs, pads, pistons and seals on all calipers, including this one again, so they're all true, or at least the same ..