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Home > Help Needed / General Tech Chat > Rear Brake advice please..

MiniTurboBadBoy

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332 Posts
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Merthyr Tydfil

5th Mar, 2009 at 05:43:47pm

Hi I need some help.

Ive took my girlfriends mini for an MOT, the only thing its failed on was the rear brakes not braking enough.

I replaced new shoes, replaced the adjusters and collets and then adjusted and bled the brakes.

The handbrake works perfectley. However, the brakes still will not lock up, I can turn with a bar with someone pressing the pedal.

The brake cylinders work.

Any advise please could this have anything to do with the compensator valve thingy in the engine bay?

Thanks all Chris

paul wiginton
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9 times Avon Park Class C winner

Milton Keynes

5th Mar, 2009 at 05:55:58pm

That sounds about right to me

Paul

I seriously doubt it!

Rob Gavin

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Glasgow

5th Mar, 2009 at 06:11:28pm

the shoes will take a bit of time to bed in yet although you don't really want them locking up anyway;

did you test them before you replaced the shoes? how do they compare?

BENROSS

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Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

5th Mar, 2009 at 06:18:20pm

chris they want some miles on them buddy to bed in and then re adjust them like rob gavin says






Rod S

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Rural Suffolk

5th Mar, 2009 at 06:28:44pm

Check the brake cylinders work properly - sometimes just one of the two pistons siezes so the brakes still work (one piston moving and the cylinder rocking) but at lower effect.

Schrödinger's cat - so which one am I ???

MiniTurboBadBoy

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332 Posts
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Merthyr Tydfil

5th Mar, 2009 at 06:48:27pm

The brakes work the same now as they did with the old shoes. the both pistons are moving on the clyinders.

I was going to take the lip off the drum and take them for a good run and then re adjust.

Do the compensator valves fail or are they quite reliable?


Brett

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Doncaster, South Yorkshire

5th Mar, 2009 at 07:21:34pm




On 5th Mar, 2009 MiniTurboBadBoy said:
Do the compensator valves fail or are they quite reliable?

i have poped one, lost the rear brakes completely, it leaked quite noticeably from the left hand side, looking into the engine bay

Yes i moved to the darkside *happy*

Instagram @jdm_brett


Jay#2

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Northern Ireland (ex AUS)

6th Mar, 2009 at 07:48:27am

This might not be your problem but once when I was bleeding the rear brakes I managed to make my PDWA valve stick so very little pressure was passed to the rear.

On 7th Nov, 2008 Nic said:
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!!!!!!sdrawkcab si gnihtyreve ?droabyekym ot deneppah sah tahw ayhwdd


Bat

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Bermingum

6th Mar, 2009 at 10:06:50am

Hi,
Minis have always had piss poor brakes on the back. They don't lock even when good. Back the handbrake cables right off the adjust the shoes then windthe cables back up. As said above new shoes will need bedding in.
If you get a reading of 50 or more on the rollers at the rear that's about right.
Cheers,
Gavin :)

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