brake bleed

Message

big alan · #1 Post by **big alan** » Mon Mar 31, 2014 5:29 pm

ive fitted a 2 line front kit and it wont bleed up it is drawing fluid (about half a ltr) but no pressure in the system
any ideas

Aladinsaneuk · #2 Post by **Aladinsaneuk** » Mon Mar 31, 2014 5:37 pm

Front brake is not normally a problem

You did use new washers didn't you?

In the Aprilia tech section is a sticky called bleeding our hydraulics....

big alan · #3 Post by **big alan** » Mon Mar 31, 2014 5:46 pm

new lines / new bolts / new washers

Aladinsaneuk · #4 Post by **Aladinsaneuk** » Mon Mar 31, 2014 6:23 pm

Hmmmm

Sounds like an air leak somewhere.... Little nip tight?

Try cable tying the brake on overnight....

I now cheat and use a vacuum bleeder - well worth 20 quid imho

zoidberg · #5 Post by **zoidberg** » Mon Mar 31, 2014 6:41 pm

Don't forget the nipple on the master cylinder

Dalemac · #6 Post by **Dalemac** » Mon Mar 31, 2014 8:06 pm

zoidberg wrote:Don't forget the nipple on the master cylinder

This.

Infact, it's by far the easiest way to bleed up the front brakes When i replaced my fluid a couple of weeks back i used the master cylinder bleed nipple to do 90% of the work.

#7 Post by **mangocrazy** » Mon Mar 31, 2014 10:01 pm

zoidberg wrote:Don't forget the nipple on the master cylinder

+2. Air bubbles rise. It makes obvious sense to bleed them out at the highest point, rather than try to force them down a tube to the lowest point in the system...

The bleed nipples on the brake calipers are only for bleeding the air trapped an the calipers. For everything else, use the master cylinder nipple.

D-Rider · #8 Post by **D-Rider** » Mon Mar 31, 2014 10:13 pm

Need to make sure that the tubes all run upwards. I have had a bit of an airlock in the tube between reservoir and mastercylinder - fixed by squeezing the reservoir hose.

Probably my radial mastercylinder setup is more prone to this but it's always a possibility.

big alan · #9 Post by **big alan** » Tue Apr 01, 2014 6:09 pm

third time lucky I held brake on all night then bled it up again this morning and it came in / did a lap this after and its all good

Aladinsaneuk · #10 Post by **Aladinsaneuk** » Tue Apr 01, 2014 6:25 pm

Air bubbles are like hobbits

Little buggers are a pain in the arse

D-Rider · #11 Post by **D-Rider** » Tue Apr 01, 2014 8:48 pm

Aladinsaneuk wrote:Air bubbles are like hobbits

Little buggers are a pain in the arse

Never realised that you and Tim were that friendly ..........

HisNibbs · #12 Post by **HisNibbs** » Tue Apr 01, 2014 9:04 pm