Brake bleeding problem.

[Reppyboyo]

Hi,

Im trying to bleed my brakes, everything is attached and nipple is closed.
Ive added clean fluid to my master cylinder, but its not going anywhere.

No matter how fast or slow I pump the fluid is not going anywhere.

Why would this be?

Thanks for any help.

[TUG]

lol mate, you need a pipe running off the nipple into a tub or jar, you hold the lever in or down, undo the nipple, then tighten it, let the lever go and repeat until you see fluid with no air bubbles in
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Haz ER-5, innit!

[Reppyboyo]

Cheers, this is taking ages.

Still no pressure after 3 refills from the lower mark.

fun.

[Reppyboyo]

It is on a paddock stand yes.

Ill try tapping the caliper.

I dont think there is a bleed nipple near the res.

[puremagic72]

Suck it up damn you, just suck it up!!!!!

Best way,

Baz.
____________________
Make; cbr929cc blade Year; 2001
Gsxr 750 2000, alstare Corona, Current bike 1999 R6
(1) Kids in the back seat cause accidents; accidents in the back seat cause kids.

[TUG]

tapping the lines an caliper will move the bubbles up as air rises, pump the pedal like stated until pressure is felt, leave for a few hours then bleed again whilst filling, if theres still a lack of pressure then i suggest seeing if the caliper is seized?
____________________
Haz ER-5, innit!

[Reppyboyo]

Pumping it seems to have done the job. My hand hurts now.

Both the calipers were bled and I couldent see any bubbles, no pressure.
Pumped it as you suggested and now its very very firm.

Until I cracked the nipple that is but now theres just very fine bubbles coming out.

[TUG]

thats because the pads whert in contact with the pistons.
____________________
Haz ER-5, innit!

[Reppyboyo]

Indeedy.

Bled both calipers again and no bubbles.
Pumped the lever again and its very firm once again.
Thanks for the help all!

I doubt I`ll be rideing tonight, bar a slow speed brake test on my drive, should I zip tie to lever down overnight or not bother?

[Syx]

[TUG]

[Syx]

Okay, that makes sense. So does that mean if the pistons stay in contact with the pads, air gets trapped in there - and that's the source of the bubbles?

[TUG]

no, air gets in when you undo the bleed nipple, or the banjo bolt at either end of the brake line. if you change your brake pads by just pushing the pistons in and putting the new pads in then all you have to do is pump the pedal to get the pistons back in contact with the pads. you understand now? i didnt understand it that well either till i did it myself.
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Haz ER-5, innit!

[Kickstart]

[Syx]

Ah right I see - I've misunderstood a little here.
I've changed my pads before and knew all about having to pump the lever first, but I thought your original quote of "thats because the pads whert in contact with the pistons." referred to the fact that he said "now theres just very fine bubbles coming out".

It's all clear now!

[TUG]

sorry if i confused you a bit, glad your clear now though
____________________
Haz ER-5, innit!