Problem bleeding brakes

freeman35 · Oct 23, 2018

Sorry if this has been asked and answered..

I have a 95 k1500 with 10bolt and 10inch drums.

I just swapped out the rearend. I got the replacement out of 95 tahoe with 10bolt 11inch drums.

I replaced wheel cylinders, shoes and drums.

I'm attempting to bleed the rear brakes but I'm not getting any fluid or air coming out of bleeder valve.

Sent from my iPhone using Tapatalk

east302 · Oct 23, 2018

Maybe this will help. Is the brake warning light on? It almost sounds like the pressure differential valve has tripped, closing off the rear circuit.

xc_hide_links_from_guests_guests_error_hide_media

Sent from my iPhone using Tapatalk

freeman35 · Oct 24, 2018

It is the pressure differential valve. I took the switch out and manually moved the valve.

Every time I went to bleed the rear it moved back.

If I moved the valve to center released the pressure in the front and gravity bled all 4 wheels do you think that would work?

Sent from my iPhone using Tapatalk

east302 · Oct 24, 2018

Do you have fluid at the rear port on the master cylinder? Just crack the line a little.

The valve is held centered based on front and rear pressure, so (yes) I’d try sliding it to center and letting it gravity bleed at all four corners.

Did you try holding that pin flush (not shoving it in, just keeping it from extending) while pumping the brakes?

Or I’ve heard of people quickly stabbing the brake pedal and getting it to reset.

Sent from my iPhone using Tapatalk

freeman35 · Oct 25, 2018

So I ended up not having any luck keeping the valve centered. I tried everything even sticking a small screw driver in and holding the valve center while some pressed the brake in attempt to get fluid in the rear to build pressure. I figured I would just start taking the line apart at different points and figure out where the fluid was stopping

I finally figured out the problem is the master cylinder. I took the lines off at the ABS MODULE and pressed the brakes and had fluid shoot out at the line supplying the front but nothing would come out from the line supplying the rear. So I was never getting fluid to the pressure differential valve in order to keep it centered.

Sent from my iPhone using Tapatalk

east302 · Oct 25, 2018

Glad you got it sorted out, thanks for updating.

Sent from my iPhone using Tapatalk

freeman35 · Oct 26, 2018

Thanks for your recommendation on helping me

Sent from my iPhone using Tapatalk

Problem bleeding brakes

freeman35

I'm Awesome

east302

I'm Awesome

freeman35

I'm Awesome

east302

I'm Awesome

freeman35

I'm Awesome

east302

I'm Awesome

freeman35

I'm Awesome

Similar threads

Latest posts

Members online

Forum statistics

Share this page