gingerprince
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| posted on 30/3/08 at 04:45 PM |
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Bleeding Brake Drums
This may sound like a silly question, but then I'm a silly person 
Trying to figure out how to bleed the back end (9" Sierra drums I believe), but I can't find a bleed nipple? In the Haynes manual the
picture looks like it's right next to where the brake line goes in. However on mine the "other" connection, which looks like the
nipple should be at, instead there's a brake pipe going to the same on the other drum at the other side!
I've no idea how these should be configured, but is this right or has the builder done something silly (or something particularly clever)? If
it's right, how do I bleed the blummin' things? 
Thanks, Sy
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britishtrident
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| posted on 30/3/08 at 04:51 PM |
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1960s & 1970s Ford Escort live axles generally have only one bleed nipple as they came from factory, both rear brakes are bled thorough this.
Sierras have two bleed nipples
[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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theconrodkid
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| posted on 30/3/08 at 04:51 PM |
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some cars had a nipple on one side only with a pipe running across the axle.
best idea is to put a T piece in the middle of said axle and a pipe to either side
who cares who wins
pass the pork pies
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blakep82
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| posted on 30/3/08 at 04:51 PM |
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i really can't see how that could work, because ther'll be air in the system with no way of getting it out!  not even sure how
you'd get any fluid into the cylinders either... is it just a solid pipe from one to the other? like no bleed nipple in the middle somewhere?
like 2 for both cylinders?!
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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indykid
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| posted on 30/3/08 at 04:52 PM |
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so how many flexi lines do you have at the back? 2 on one side and one on the other?
the brake line should be tee'd on the chassis, then one line run to either side, but if it's one line from front, across to one side then
back to the other, you'll just have to try push the air right through one cylinder and bleed it out of the other.
tom
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delboy
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| posted on 30/3/08 at 04:52 PM |
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It sounds strange as you've described it and I can't figure out whats been done. However, to bleed the back brakes you could just loosen
the pipe union and bleed them with a helper pushing the pedal, locking the pipe union whilst the helper raises and re preessures the pedal. i.e just
as you would do using the bleed nipple.
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gingerprince
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| posted on 30/3/08 at 05:22 PM |
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Thanks. All.
Right, there was my first mistake - looking at one side and assuming it would be the same as the other
Having looked at the other side, I now see that the configuration is as follows: -
Pipe from master cylinder to OSR drum.
Pipe from OSR drum to NSR drum.
Nipple on NSR drum.
So I guess I just bleed both the rears through the one nipple. Is this a poorer solution than separate feeds from a tee, or is it neither here nor
there?
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britishtrident
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| posted on 30/3/08 at 06:26 PM |
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It works OK not worth changing, but it would not my choice for a new build.
[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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gingerprince
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| posted on 30/3/08 at 07:05 PM |
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Fair enough, guess the guy who built it was just used to the old school configuration.
All bled through now OK though.
Cheers all.
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