speedyxjs
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| posted on 6/11/09 at 05:47 PM |
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To rebuild or replace, that is the question
Iv just spent 2 hrs trying to bleed the brakes and work out why it wont work 
The two outlets i have used for the front just pump out air but the one for the rear seems to work ok (although all the brake fluid ended up on the
floor due to a loose connection further up the line  ).
It is worth trying to recon the MC or would it be easier (cheaper) to buy another one?
How long can i resist the temptation to drop a V8 in?
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speedyxjs
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| posted on 6/11/09 at 05:53 PM |
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Also, where are rebuild kits availabe from?
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chrsgrain
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| posted on 6/11/09 at 06:04 PM |
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Its brakes - don't cock about.... buy a new one! You're going to have a lot of weight in the front to stop 
Chris
Spoing! - the sound of an irony meter breaking...
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Benzine
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| posted on 6/11/09 at 06:05 PM |
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have you tried putting your thumb over the outlets when you pump the pedal? i.e. thumb over the hole when you let go of the pedal. I did this when I
first bled my brakes and the fluid came through eventually
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britishtrident
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| posted on 6/11/09 at 07:48 PM |
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Usually best to stick bleed nipples in the outlets and prime the master cylinder first. Then top it right up to the absolute brim and stretch a poly
bag over the filling orrifice and hold that on tightly with and elastic band to make an air tight seal.
You can then remove each bleed nipple in turn and connect each circuit remove the polythene and bleed normally, pumping the pedal ***slowly***
particularly on the return stroke.
You may find using a Gunson Eezibleed makes life easier.
British dual circuit master cylinders (Lucas or Girling or Lockheed) are fairly easy to overhaul the internals are real just the same as two single
circuit cylinders sharing the same bore.
The main problems that occur in them are either the recuperating valve or the seal onthe rear most piston gets destroyed by crud deposits on the end
of the bore.
Try Brake Int for seals.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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speedyxjs
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| posted on 6/11/09 at 08:22 PM |
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Cheers. Il have another look tomorrow and try the methods suggested before i spent any money 
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40inches
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| posted on 6/11/09 at 08:34 PM |
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I now use one of THESE when bleading brakes plus a Gunstones eezi
bleed if the job turns into a barsteward, but the vacc pump works 90% of the time
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02GF74
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| posted on 7/11/09 at 01:42 PM |
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what master cylinder is it?
do you know condition i.e. have you known it to been working?
how are you bleeding the brakes?
is it fitted at same angle as in the donor?
has it been sitting dry for a long time?
TBH can't understand how fluid is not getting to the front two ports.
if you remove either one of the front pipes, does fluid come out?
I am all for recycling but if the master is proven to be faulty, replace - never f**k with brakes,
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