Bleeding clutch

Bleeding clutch

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Discussion

caduceus

Original Poster:

6,069 posts

265 months

Friday 24th February 2017
quotequote all
I have no clutch pedal pressure frown

Fitted new clutch master cylinder and had a new cylinder to ally block pipe made up by Pirtek. Have tried bleeding the thing but no pressure there at all. The fluid IS going through but no pressure.
After trying again yesterday I did notice a little black fluid weep out of one of the slave inlet/bleed screws. Where would that come from and why? As the whole system was emptied and refurbed. The slave was off and cleaned with a new seal in it when the box was off.
There was nothing wrong with the clutch before the resto, but I did notice the mater weeping, hence the change.

Any ideas chaps? Slave mysteriously given up? (even though it was five before..)

Thanks in advance
Cad

phazed

21,844 posts

203 months

Friday 24th February 2017
quotequote all
Slave assembled wrongly?

caduceus

Original Poster:

6,069 posts

265 months

Friday 24th February 2017
quotequote all
phazed said:
Slave assembled wrongly?
Possibly... frown

Just need to get the thing back up in the air again, which with the size garage I have and a sports bike to faff around with, is no mean feat. I need to invest in some kind of hydraulic wheel lift. That or a long reach low profiled trolley jack.

macdeb

8,492 posts

254 months

Friday 24th February 2017
quotequote all
They can be a PITA to bleed. Best way I find is to bleed from slave cylinder up by using an oil can ( the sort with trigger like pump) filled with brake fluid of course with rubber hose attached between that and slave nipple and bleed up to master cylinder, making it easier to displace any air in system. I used to do my motorbikes this way and it made it a piece of piss to do as your not trying to force air downwards.

Sardonicus

18,928 posts

220 months

Friday 24th February 2017
quotequote all
Seals fitted back to front, clutch should gravity bleed no problem just be patient

aero340

271 posts

211 months

Friday 24th February 2017
quotequote all
make sure the slave bleed nipple is at the top with the pipe below.

SantaPod

54 posts

196 months

Friday 24th February 2017
quotequote all
And in just case you don't know, make sure the slave cylinder piston is push fully back during bleeding to expel all the air...

Pupp

12,205 posts

271 months

Friday 24th February 2017
quotequote all
Gravity. Crack the nipple and go make tea...

ClassicChimaera

12,424 posts

148 months

Friday 24th February 2017
quotequote all
Pupp said:
Gravity. Crack the nipple and go make tea...
hehethumbup

macdeb

8,492 posts

254 months

Saturday 25th February 2017
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My method took shorter time than it takes to make a cuppa wink

caduceus

Original Poster:

6,069 posts

265 months

Sunday 26th February 2017
quotequote all
Thanks for the replies chaps. Apart from Gary... hehe

macdeb - genius idea. Will give that a go after I've taken off and checked the slave assembly. As Simon says, I could have assembled it incorrectly.

Pupp

12,205 posts

271 months

Sunday 26th February 2017
quotequote all
caduceus said:
Thanks for the replies chaps. Apart from Gary... hehe
Wha? That was a serious reply... if you open the nipple and wait a while, it will self bleed... a couple of taps on the pedal to get it moving maybe but it does work on clutches and brakes alike. Mac's solution is fine too 'though if you have a small clean oil can or big syringe to hand.

Anyway, I like tea...

caduceus

Original Poster:

6,069 posts

265 months

Sunday 26th February 2017
quotequote all
Lol, it was a tongue in cheek comment Gary. Although I must admit I do have doubts it'll be as effective as the can method. But will give it a go.
My reckoning is that I've assembled something in the slave wrong. It can't be this hard to bleed it. There was absolutely no pressure in the pedal whatsoever when we tried bleeding it the normal way.