Technical Tips > Brakes, Suspensions, Steering, Wheels & Tyres

brake bleeding

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Benandsally:
Hi All,
I need help,,,
I am in need of a Brake Mechanic who knows brakes on 71.
I have replaced the front two calipers and pads, well do you think i can bleed this sucker.
I have used a vacuum bleeder and have tried to bleed  them manually, still no peddle.
Has any one else experianced this and or does any body know someone out Liverpool way or close i can show this to or get to repair for me ?
Thanks again...
:sulk:     :mad:

demonx:
If you didn't pinch the line with some vice grips or something similar and heaps of air has got in then it could take quite some time to bleed it all out.

When doing mine I went through two bottles of fluid till I got a good pedal. That was with all four calipers off and all four lines pinched. Does that sound familiar or are you well beyond that much fluid?

Benandsally:
Hi Demonx,
No i didn't pinch any lines with vice grips whilst bleeding just vacuum sucked and then manual bleeding ( pump and hold ).I did go through 2 and a half bottles of fluid.I did this proceedure three times, all to no avail.
Even whilst bleeding manually i had the vacuum on as not to let any air return.
Thanks

demonx:
I didn't mean pinch when bleeding, I meant during removing calipers etc. I always lock something on the hose before I un do the caliper, that way you massively reduce the air entereing the system. You stiull have to bleed but not as much as if you didn't lock the line.

I've never used a vacuum or anything to bleed, always just done it the old school way, one person in the car pumping the pedal, the other person working the nipples.

A few questions just to problem solve (I'll also ask the dumb questions just in case, I know I've done stupid things before):

Why did you replace the calipers? If the brakes were soft maybe it was not the calipers and could be the master cylinder or hoses?
Are all the nipples in place? Are
Are you bleeding the top nipples?
What condition are the hoses in - even if they look perfect are they bulging?
Are there any leaks that you can see - including dripping down inside the wheel rim and not getting as far as the floor?

Thats about all I can think of straight away...

Benandsally:
demonx
NO questions sound dumb especially when i cannot figure it out and yes i have came under the stupid catorgy a few times so keep them problem solving questions coming.
OK no i didnt pinch the line because i undone it at where  hard line joins soft line on inner guard.
I replaced the 2 front calipers because they were leaking on the disc and were part seazed with a lot of corrosion.Nipples are in place and am bleeding top nipples. Lines are in good condition and are not buldging in any way.
Yes i had the leaking on the inside but that was dripping from the disc re; leaking calipers
Thanks heaps

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