I have my orginal master cylinder thats off my 1969 camaro Z28. What is the proper procedure for bench bleeding this master cylinder with bleeder screws?
The way I bench bleed the master is with 2 old cut off brake lines with hoses attached going back into a full master reservoir. You can see the air pumped out of the hoses as you depress the piston several times. Then you mount the master on the car and flush & bleed the system go back and open the master bleeder screws for any residual air. George
Here's a photo of the bench-bleed setup I use on my '67 Corvette master cylinder. Forget the bleeders on the master cylinder - just use the setup as shown and stroke the piston until the fluid runs free of air bubbles.
Nice setup JohnZ! :)
Where does one find those neat little hose adapters? or did you have to make them yourself? :)
UNIVERSAL BLEEDER (http://www.ebay.com/itm/Dorman-Help-Master-Cylinder-Bleeder-Kit-13910-/230764129487?hash=item35ba9d2ccf&item=230764129487&pt=Motors_Automotive_Tools&vxp=mtr)
Ed
I believe the bleeder screws on the original master cylinders were only used for production line purposes and never used in service.
-Mark.
Quote from: Stingr69 on April 10, 2012, 01:52:05 PM
I believe the bleeder screws on the original master cylinders were only used for production line purposes and never used in service.
-Mark.
We didn't use them in production, and we didn't use the bleeders at the calipers and wheel cylinders either; we evacuated and filled the brake system through the little compensating port in the bottom of the master cylinder reservoir. :)
Quote from: JohnZ on April 11, 2012, 10:46:09 AM
Quote from: Stingr69 on April 10, 2012, 01:52:05 PM
I believe the bleeder screws on the original master cylinders were only used for production line purposes and never used in service.
-Mark.
We didn't use them in production, and we didn't use the bleeders at the calipers and wheel cylinders either; we evacuated and filled the brake system through the little compensating port in the bottom of the master cylinder reservoir. :)
Quote from: JohnZ on April 11, 2012, 10:46:09 AM
Quote from: Stingr69 on April 10, 2012, 01:52:05 PM
I believe the bleeder screws on the original master cylinders were only used for production line purposes and never used in service.
-Mark.
We didn't use them in production, and we didn't use the bleeders at the calipers and wheel cylinders either; we evacuated and filled the brake system through the little compensating port in the bottom of the master cylinder reservoir. :)
Thanks for the correction John. I am sure you are right.