bleeding brakes

i have a CNC master cly with M/W duel piston brake claipers [has bleeder on bottom and one on top of caliper]i'm not able to get brakes to bleed..i started out bleed at M/C then at right top and left top then right bottom and last l bottom..not getting any brake pressure at all at bleeders;;everything is new;;am i bleeding wrong or starting at wrong place..been doing brakes on stock cars and hot rods for 50 yrs and never had a probluminum bleeding brakes;;;;the way i bleeding[new way i just started doing a yr ago]is i loosen bleeder and have someone push brake pedel down slow till hits floor and holds there till i tighten bleeder.then he releases pedel back to top..keeping doing this way..has aways worked for me this way on stock calipers with only 1 bleeder per caliper..am way i'm doing doesn't work with the 4 bleeders[top/bottom of calipers]?

 

Is the master lower than the calipers? That will cause you grief. Did you bench bleed the master? Usually the farthest caliper to the nearest one when bleeding. I got myself a pressure bleeder to save the problems.

Corey

 

m/c is below the calipers but i do have a 2lb resuduel valve between m/c and calipers..

 

If the master is lower it may be having trouble pushing the air up hill and the bubble is trapped somewhere. All it takes is a bit of a bubble and you will be chasing your tail.
Find yourself a cheap hand operated vacuum pump with a bleeder attachment, they have them at the local Chinese supply stores for 30-40 bucks.


Corey

 

got them bleed;;had another racer tell me to not try to bleed using the bottom bleeders[i was trying to bleed
all 4 bleeders;;once i left bottom bleeders along then had brakes after about 15 mints bleeding;;;

 

bleeders

Bleed only top Furthest away first

 

Kinda like putting the calipers on upside down. Glad you figured it out.

 

also one thing to check is the cap on the master cylinder, If there is a rubber piece inside the master cylinder lid make sure it has a slot cut into it. All it needs is a razor blade to put a slice in the center of it to allow it to breath. I ran into this problem a few times but only with Strange dual lid master cylinder. I always check every other one i deal with just to be safe