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Bleeding Brakes
Posted: Sat Jun 17, 2006 11:13 pm
by scott75
Hi all i am replacing my front suspension when it comes to bleeding the brakes with a servo fitted do i need to have the engine running?
I have been told that the servo has to be activated in order to bleed the brakes is this true?
Also will i need to bleed the back brakes as i think i have only lost a little fluid from the front.
And finally what is the correct sequence for the bleeding?
Many thanks
Scott
Posted: Sat Jun 17, 2006 11:16 pm
by Welung666
Scott I've never bled servo brakes with the engine running, they push plenty of fluid through without the servo on full vacuum. If the rear brakes are untouched they shouldn't need bleeding as well. As for bleeding sequence start with the longest pipe working down to the shortest.
Hope thats a help.
Lee
Posted: Sun Jun 18, 2006 11:20 am
by scott75
Thanks Lee it's a long time since i have blead the brakes i wanted to be sure before i started.
I did not fancy doing it whilst the egine was running.
cheers
Scott
Posted: Mon Jun 19, 2006 11:03 pm
by bmcecosse
My method - make mug of coffee, put tube on nipple and other end in jam jar, open nipple, sit back and drink coffee, close nipple. Top up master cylinder. Repeat for next nipple. Works with beer too - but don't recommend test drive afterwards!
Posted: Wed Jun 21, 2006 12:44 pm
by ColinP
Scott,
I found it easy using the Ezibleed system - though I don't have servo brakes...
With a servo you probably have a different reservoir (?). The Ezibleed should have sufficient adaptors for most, though I had to take a m/c cap, drill and tap a hole as well as blocking up the air vent.
BMC - I'm not sure how you can remove all the gas from 70/- using just 1 bleed nipple! I find it takes several attempts to get rid of all the bubbles...
Seriously, though, do you pump the pedal between sips of coffee?
Colin
Posted: Wed Jun 21, 2006 9:07 pm
by bmcecosse
No - it just runs through. Can watch the little bubbles of air going down the tube. Trick is not to fall asleep and let the m/s run empty!
Posted: Wed Jun 21, 2006 9:45 pm
by Onne
how do you get it to run without any pressure? surely vacuum on its own is hardly enough!
A mate of mine is working on an adapter for the Ezibleed system, one that WOULD fit the BMC
Posted: Wed Jun 21, 2006 11:42 pm
by rayofleamington
how do you get it to run without any pressure?
I'd presume that the m/c cup seal is not working properly, otherwise you'd get too little flow.
This method is sometimes useful on (non Minor) cars with high mounted reservoirs - the flow rate can often be enough to flush bubbles through, but not on a Morris due to lack of reservoir height (and definately not if the cup seal in M/C is working)
Posted: Thu Jun 22, 2006 12:26 pm
by ColinP
Onne,
Making the adaptor for the BMC is really easy!
I just took a spare cap (ESM sell them), drilled out a large hole in the top, used a tap if the correct size/thread pitch and one of the standard fittings screws in - no problem.
Blocking the air vent was a little more difficult - again drill and tap - but the thread needs a little epoxy resin to seal.
I'm not using it at the monment - do you need one now?
Colin