The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Installed a new M/C, doesn't work at all, what am I missing??

65 C20 · 12-14-2014, 01:18 PM

This might be a long shot.
When you are doing the vacuum bleeding or the air pressure thru the master do you have the brake pedal depressed ?
I am wondering if one of the seals or 0-rings have partially come off of the piston inside the master.
If you are taking the master off to replace, take it apart before you order another one and see if everything looks like it should.
Just a thought, you have done just about everything else.

12-14-2014, 01:18 PM	#37
65 C20 Registered User Join Date: Nov 2013 Location: Comox BC Posts: 337	Re: Installed a new M/C, doesn't work at all, what am I missing?? This might be a long shot. When you are doing the vacuum bleeding or the air pressure thru the master do you have the brake pedal depressed ? I am wondering if one of the seals or 0-rings have partially come off of the piston inside the master. If you are taking the master off to replace, take it apart before you order another one and see if everything looks like it should. Just a thought, you have done just about everything else.