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Re: Brake bleeding HELP

Reply #15
If you are pumping fluid through the system but not getting any "feel" on the brake handle, you still have air trapped in the system somewhere. 
 
Brake fluid is (for the sake of this discussion) incompressible.  When you "squeeze" it inside the master cylinder the pressure moves down the line and applies that same (or nearly) pressure to the brake pad. 
 
Air, however, is compressible.  If you have a small pocket of air in the line, master cylinder, splitter, or banjo bolt assembly (all typical hiding places) the brake handle must first compress that air until the pressure is equal that of the line pressure needed.  However, the master cylinder volume is fixed and if enough air is present, the master cylinder will run out of "throw" before it compresses the air enough for you to "feel" it....
 
If you have no feeling at all but are pumping brake fluid, you still have air trapped in the system somewhere.  :( I have gone through an entire quart of brake fluid before trying to get the air out of the master cylinder on one before.  Sometimes, they can be a real pain..... Just keep at it and all of the sudden, for no apparent reason, it'll clear up and start working great and you'll have it, then.
Click on the pic VVVV You know you want to....


Re: Brake bleeding HELP

Reply #16
If you are pumping fluid through the system but not getting any "feel" on the brake handle, you still have air trapped in the system somewhere. 
 
Brake fluid is (for the sake of this discussion) incompressible.  When you "squeeze" it inside the master cylinder the pressure moves down the line and applies that same (or nearly) pressure to the brake pad. 
 
Air, however, is compressible.  If you have a small pocket of air in the line, master cylinder, splitter, or banjo bolt assembly (all typical hiding places) the brake handle must first compress that air until the pressure is equal that of the line pressure needed.  However, the master cylinder volume is fixed and if enough air is present, the master cylinder will run out of "throw" before it compresses the air enough for you to "feel" it....
 
If you have no feeling at all but are pumping brake fluid, you still have air trapped in the system somewhere.  :( I have gone through an entire quart of brake fluid before trying to get the air out of the master cylinder on one before.  Sometimes, they can be a real pain..... Just keep at it and all of the sudden, for no apparent reason, it'll clear up and start working great and you'll have it, then.
Thanks man i was going mental! So should i just follow what i was doing? Pump and hold brake lever then crack banjo bolt, retighten then release lever and repeat??

Thanks again bro



Re: Brake bleeding HELP

Reply #19
Ok so thats my brakes working perfect thanks James  ;) rep for you  8)

So you got it all straightened out?  Did it just "poof" decide to start working?  They do that sometimes! 
Click on the pic VVVV You know you want to....


Re: Brake bleeding HELP

Reply #20
Just as a little side note start with the brake farthest from the master cylinder. Just a tip I was tought working on cars

Re: Brake bleeding HELP

Reply #21

So you got it all straightened out?  Did it just "poof" decide to start working?  They do that sometimes!
Ha yes it did bro i just went through the full process again, cracked the master banjo then worked at it and 8 cracks of the lower banjo and i was good to go, 4 cracks on the bleeding nipple and the lever was nice and firm! Thanks for your help bro  ;) ;)

Re: Brake bleeding HELP

Reply #22
Just as a little side note start with the brake farthest from the master cylinder. Just a tip I was tought working on cars
Hey thanks man but my front brake lines are the same length so it makes no dif! Cheers!