No Pressure to Rear Brakes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dccarpenter · 03-15-2011, 08:52 PM

Seeking out a bit of help from some members, we ran all new brake lines in my '75 Blazer, while trying to bleed the brakes we are getting no pressure at the rear wheels. I have the hood up and with the cover off the master cylinder when I pump the brakes the fluid shoots up so I know the master cylinder is ok. We are bleeding them with the car off by the way.

My buddy thinks he may have run them to the wrong spot on the proportioning valve, ie. the front in the back's slot. Is there any way this would cause this to happen?

Do I need to run the car for the booster to give me enough pressure to get to the rears?

Any help is greatly appreciated.

03-15-2011, 08:52 PM	#1
dccarpenter Registered User Join Date: Jun 2009 Location: Washington, dC Posts: 176	No Pressure to Rear Brakes Seeking out a bit of help from some members, we ran all new brake lines in my '75 Blazer, while trying to bleed the brakes we are getting no pressure at the rear wheels. I have the hood up and with the cover off the master cylinder when I pump the brakes the fluid shoots up so I know the master cylinder is ok. We are bleeding them with the car off by the way. My buddy thinks he may have run them to the wrong spot on the proportioning valve, ie. the front in the back's slot. Is there any way this would cause this to happen? Do I need to run the car for the booster to give me enough pressure to get to the rears? Any help is greatly appreciated.



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