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Soft pedal after much bleeding.

Posted: Wed Aug 12, 2009 1:31 pm
by jwdg298
Hi again, I know this has been covered before on the old forum but please bear with me.....

After doing a rear disc conversion, braided lines and mc/servo upgrade I have done much pressure bleeding and also one session of manual two person bleeding (with calipers fitted on the car), I now have a nice firm pedal with engine off but once she's running I seem to get a lot of travel before pretty good braking finally occurs, this doesn't seem right to me.

I don't think its play in the push rod as that feels fairly solid so kind of erring towards still having air in the system. I have left her with the cap unscrewed for a while as I read somewhere that this may help and (imagination maybe?) it seems a bit better, but is it worth taking the calipers off again and bleeding them manually upside down? As she's currently sorn'd I can't really take her out for a spin to fully test it out, but It doesn't feel quite right at the mo.

I don't think air is getting in at the unions as the pedal hasn't got worse over time since doing the work (a good while ago now!!!!) as i thought it would, I may be wrong on my understanding here though. Also haven't adjusted the handbrake yet but didn't think this would affect it much??

Basically run out of ideas :dash: so any help/suggestions would be great. :help:

The only other option is to get her insured and in for an MOT, they would let me know one way or the other I guess.

Re: Soft pedal after much bleeding.

Posted: Wed Aug 12, 2009 8:48 pm
by monzajake
Calipers off fella, turn upside down.
Air traps in a chamber in the caliper, when your bleeding them shake the caliper about slightly. I bleed mine up a couple of months back but still didnt get the pedal right, i found that if i shoke them slightly abit more air came out from some where.

Also start from the furthest then work back to the master cyclinder.. (furthest to nearest)

Re: Soft pedal after much bleeding.

Posted: Thu Aug 13, 2009 9:27 am
by Nate
try tapping them with a scre3wdriver handle while they're off. try to get the bubbles to float to the top

Re: Soft pedal after much bleeding.

Posted: Thu Aug 13, 2009 10:36 am
by jwdg298
Thanks guys, sounds good, I will give the tapping and shaking a go. (sounds like a dance :chortle: )

Re: Soft pedal after much bleeding.

Posted: Thu Aug 13, 2009 11:24 am
by Nate
:dance:

Re: Soft pedal after much bleeding.

Posted: Thu Aug 13, 2009 11:44 am
by jwdg298
Nice moves....... :groove: .......ooh, its almost a dance off....