cjtheman
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| posted on 12/5/09 at 08:34 PM |
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rear brakes locking
hi all
need to sort out my sva fail
the rear brakes lock up before the fronts
any idea's on a easy fix
standard escort drums and m16 cortina fronts
cheers
colin
[Edited on 12/5/09 by cjtheman]
wanted
sunny weather
sva pass 12/6/09
taxed 16/6/09
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Howlor
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| posted on 12/5/09 at 08:38 PM |
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Are the fronts, rust and grease free + bedded in?
If so then although unusual you may need to fit a brake pressure valve in the rear line, or one of the sierra units.
You sure you have all of the air out of the fronts?
Steve
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adithorp
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| posted on 12/5/09 at 08:42 PM |
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What master cylinder set up have you got?
adrian
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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cjtheman
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| posted on 12/5/09 at 08:44 PM |
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hi
they wasn't bedded in before the test as no way of road testing but put a few miles into them last weekend with trade plates 
still smiling now
cheers
colin
wanted
sunny weather
sva pass 12/6/09
taxed 16/6/09
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Snap-off
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| posted on 12/5/09 at 08:45 PM |
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I failed on the same issue. Not a quick fix but I fitted a restrictor valve from a Mondeo master cylinder into the rear brake line.
One of these:
 
Description
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cjtheman
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| posted on 12/5/09 at 08:49 PM |
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this is my master cylinderImage deleted by owner
wanted
sunny weather
sva pass 12/6/09
taxed 16/6/09
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cjtheman
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| posted on 12/5/09 at 09:07 PM |
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hi
what model of mondeo should i look for
cheers
colin
wanted
sunny weather
sva pass 12/6/09
taxed 16/6/09
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PAULD
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| posted on 12/5/09 at 09:57 PM |
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locking brakes
I had the same problem. I think you need ford part no 7117274 connected to the rear feed at the master cylinder.
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Snap-off
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| posted on 13/5/09 at 06:06 AM |
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quote:
Originally posted by cjtheman
hi
what model of mondeo should i look for
cheers
colin
Not sure what year etc. Got mine of ebay, just be sure the restrictors are still attached if you are buying second hand. there is one on there now.
Mondeo Master Cylinder
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britishtrident
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| posted on 13/5/09 at 06:13 AM |
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Sanity check
Escort drums and Cortina fronts shouldn't lock the rears first.
Sounds as to more like seized calipers -- before buy anything check the pistons and pads in calipers are moving freely.
Cortina/Escort calipers are very prone to both the pistons seizing and the pads sticking in the calipers.
[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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cjtheman
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| posted on 13/5/09 at 10:49 AM |
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hi bt
the calipers were refurbed by trw
all new pads and all new shoes springs and wheel cylinder
cheers
colin
wanted
sunny weather
sva pass 12/6/09
taxed 16/6/09
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britishtrident
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| posted on 13/5/09 at 02:18 PM |
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quote:
Originally posted by cjtheman
hi bt
the calipers were refurbed by trw
all new pads and all new shoes springs and wheel cylinder
cheers
colin
Check the calipers & pads are free
Not unknown for brand new P16 & M16 calipers to seize if the pistons are pushed too far into the caliper also brand new pads can jam in the
caliper.
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40inches
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| posted on 13/5/09 at 02:48 PM |
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Does the master cylinder have different sized bores front/rear? If so have you plumbed them in the right way round? Just a thought 
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