Brake Master Cylinder

Post by **rayofleamington** » Sun May 28, 2006 10:31 pm

my pedal is firm, and doesn't go down to the floor when pressed hard for a while.

If it leaks on its own but you have a firm pedal that doesn't slowly sink, then I can't see how it will be the T-piece. It really seems to be a leaking secondary seal (the one that is meant to stop the reservoir fluid leaking out of the bore). Normally they leak both ways i.e. allows fluid out and lets air in - This will give the bubble when you press the pedal, but I suppose it is possible that it could leak without letting air in.

Post by **Onne** » Sun May 28, 2006 10:34 pm

I have ordered a BMC set. Which will come with new bolts and nuts, copper washers etc.

I don't actually know which one I have, but I have purchased the 1098 one, because of my big brakes up front.

Post by **rayofleamington** » Sun May 28, 2006 11:04 pm

I don't actually know which one I have, but I have purchased the 1098 one, because of my big brakes up front.

I was told that the early ones are not easy to get anyway!

Post by **Onne** » Sun May 28, 2006 11:29 pm

I think there are only 2 sorts, the big bore for the early ones, with the 7" drums, and the smaller bore for the big braked Minors

Post by **Onne** » Sat Jun 03, 2006 3:55 pm

I replaced it today. All sorted within two hours, no messing with the torsion bar, the bolts were already t'other way round.

I inspected the BMC, the bore was knackered, and there was a lot of sand in the resevoir. Or rusty crud.

It's now all nice and working again!

Post by **bmcecosse** » Sat Jun 03, 2006 9:09 pm

Well done - result!

Post by **Onne** » Sat Jun 03, 2006 11:24 pm

Indeed, nice to have brakes I can rely on

Post by **Chris Morley** » Wed Jun 07, 2006 1:06 am

Glad to hear you got the problem sorted Onne. If you aren't sure if a clear liquid is brake fluid, just mop some up in a tissue and sniff it. The smell of brake fluid is pretty obvious.

Post by **Kevin** » Wed Jun 07, 2006 11:25 am

and there was a lot of sand in the resevoir.

Obviously used as a Beach Buggy in the past then

Post by **Stig** » Wed Jun 07, 2006 4:33 pm

Kevin wrote:
and there was a lot of sand in the resevoir.
Obviously used as a Beach Buggy in the past then

I thought it was because of the drought!

Post by **Onne** » Wed Jun 07, 2006 5:23 pm

well, it's not the hills that have the sand, thats for sure!

Post by **cliff** » Fri Jun 09, 2006 9:54 pm

Onne wrote:I replaced it today. All sorted within two hours, no messing with the torsion bar, the bolts were already t'other way round.

i've just asked a similar question on another thread and was advised that the bolts should be as originally intended as the nuts can wear a groove into the torsion bar with dire consquences, just thought i'd mention it.

Post by **bigginger** » Fri Jun 09, 2006 10:03 pm

'tis true, unless you have thinner nuts on them and pack the heads out with washers. A bit more work, but you only have to do it once.

Post by **Onne** » Fri Jun 09, 2006 10:07 pm

that is the way I have done it. Torsion bar is not near it.

Onne