brake bleeding with proportioning valve???

kilog55 · #1 (**permalink**) 01-30-2008, 03:46 PM

can you bleed the brakes with a vaccuum pump if you used something to hold the brake pedal down so the valve stays open? or do you have to use something to hold open the little nipple thing on the pro. valve

FordTrucksKickGM · #2 (**permalink**) 01-30-2008, 03:52 PM

All Ive done is just suck out the brake fluid and air with the vacuum pump. Its a one man job. Just dont suck the master cylinder dry then you gotta start over.

kilog55 · #3 (**permalink**) 01-30-2008, 04:12 PM

huh i wasnt getting anything through with the vacuum alone, but now i have to cause i lost all my brakes and fluid in the large tub of the M.C. suck i dont have a garage cause this winter mechanics is rough.

FordTrucksKickGM · #4 (**permalink**) 01-30-2008, 04:48 PM

Did you have the cover off of the master cylinder?

kilog55 · #5 (**permalink**) 01-30-2008, 05:10 PM

yup it was getting pressure around 10 on the dial just not much fluid transfer

all new bleeders by the way

FordTrucksKickGM · #6 (**permalink**) 01-30-2008, 05:14 PM

Maybe you have a broken brake line or a restriction somewhere?

kilog55 · #7 (**permalink**) 01-30-2008, 05:19 PM

yeah ill have to check everything out, i plan on replacing the steel and rubber lines sometime soon

Mil1ion · #8 (**permalink**) 01-30-2008, 05:22 PM

kilog55 · #9 (**permalink**) 01-30-2008, 05:26 PM

so either way i must pull out the jigger, it has to be kept in the outward position during all bleeding or just the fronts? i assume just the fronts correct?

Mil1ion · #10 (**permalink**) 01-30-2008, 05:27 PM

Just the fronts

tomcasino · #11 (**permalink**) 01-31-2008, 01:57 PM

I have always just put a clear hose on the bleeder and the other end into a bottle with some clean brake fluid in it. Then press the pedal all of the way down several times until it starts to feel firm. Make sure that the master cylinder does not run dry. Make sure there are no bubbles in the tube, close the bleeder and move to the next wheel. Do this to all four corners from the farthest to the closest. I have used this procedure for many years with great results. It's always hard to find another person to push on the brake pedal when you need to.

blakeusa · #12 (**permalink**) 02-01-2008, 05:58 PM

When bleeding the front brakes on a F150 I am reading that I need to reset or do somthing with the P valve. Do I do this after I bleed the front brakes AND
do you have a diagram of what I need to pull out?

Thanks

kilog55 · #13 (**permalink**) 02-01-2008, 06:19 PM

along your frame rail if you follow the brake lines down you will see the proportioning valve on the front there is what looks like a grease nipple kinda sorta you have to use some vice-grips to hold it out while you do the fronts. obviously you want to do the rears first

Mil1ion · #14 (**permalink**) 02-01-2008, 06:41 PM

see the pin on the left side

blakeusa · #15 (**permalink**) 02-01-2008, 09:08 PM

Really appreciate all the documentation and help. It's great to have fridnds like on ford-trucks.

Blake