bleeding the brakes

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mrapriliafalco · #1 Post by **mrapriliafalco** » Mon Feb 14, 2011 7:38 pm

I decided to change my brake hoses but cannot seem to bleed the brakes.
I just pump and pump the lever without any success,could I have damaged the master cylinder.
The brake does work but it travels all the way back

BenWah · #2 Post by **BenWah** » Mon Feb 14, 2011 7:44 pm

Have you tried bleeding the mastercylinder yet? There's often a pocket of air in the mastercylinder - the reason why there's a bleed nipple on it.

BW

mrapriliafalco · #3 Post by **mrapriliafalco** » Mon Feb 14, 2011 7:54 pm

yes mate I JUST keep pumping and nothing happens

Aladinsaneuk · #4 Post by **Aladinsaneuk** » Mon Feb 14, 2011 8:30 pm

https://www.ridersite.com/viewtopic.php?t=3763

and reverse bleed makes it easier

D-Rider · #5 Post by **D-Rider** » Mon Feb 14, 2011 8:49 pm

Aladinsaneuk wrote:https://www.ridersite.com/viewtopic.php?t=3763

and reverse bleed makes it easier

What he said

Falcopops · #6 Post by **Falcopops** » Mon Feb 14, 2011 11:16 pm

Did you push the caliper pistons back into the caliper body?

That can make it difficult, the pistons can be reluctant to move back out during normal bleeding. I will bleed for a bit to get the old fluid out then nip the bleeder and pump the lever for a bit, keeping an eye on the reservoir level. That'll get the pistons moving, so back to bleeding. You might need to stop and pump the pistons more than once.

Another trick I've used to good effect is to close the bleed nipple to a point where there is some pressure at the lever, but still fluid bleeding throught the nipple. This gets the pistons moving again, but once the pads are on the disk go back to proper bleedingto ensure the air is out.

HTH