The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Trouble bleeding, no pedal

**caseyjones** · 10-14-2021, 04:53 PM

I’ve had a similar problem when I didn’t properly bench bleed the master cylinder. I’ve also had the misfortune of tripping the proportioning valve safety feature because I did t lock the piston in place before attempting to bleed the system. That electrical connection on the valve is a switch that engages when the valve closes due to a leak or lack of fluid in one half of the system. When first filling and bleeding the system you need to lock the valve in place with a little tool like this:
https://www.amazon.com/WISPAUSU-Comp...70711188&psc=1

10-14-2021, 04:53 PM	#5
caseyjones Senior Member Join Date: Nov 2013 Location: Portland, OR Posts: 512	Re: Trouble bleeding, no pedal - new disc conversion I’ve had a similar problem when I didn’t properly bench bleed the master cylinder. I’ve also had the misfortune of tripping the proportioning valve safety feature because I did t lock the piston in place before attempting to bleed the system. That electrical connection on the valve is a switch that engages when the valve closes due to a leak or lack of fluid in one half of the system. When first filling and bleeding the system you need to lock the valve in place with a little tool like this: https://www.amazon.com/WISPAUSU-Comp...70711188&psc=1 __________________ 1955 Long Distance Build 1964 GMC Palomino Tan Survivor 1964 C10 Survivor - Sold