CLASS RACER FORUM - View Single Post - Ken Etter injured in an accident at Fontana

Run to Rund · 08-25-2010, 10:56 AM

It seems that the catastrophe started with the master cylinder push rod coming out. 67-72 GM A-bodies with manual brakes have a retainer like a cup plug with an O.D. flange that traps it between the cylinder and the firewall. The pushrod is flanged and won't fall through the center hole of this retainer. This part is hard to find these days, but should never be left out. Earlier single GM master cylinders use a big snap ring to hold a plate in the back end of the cylinder and trap the flanged rod. I don't know how Mopar, etc. do it, but some positive retention of the pushrod is clearly essential.

08-25-2010, 10:56 AM	#61
Run to Rund Senior Member Join Date: Sep 2007 Location: Henderson, NV Posts: 583 Likes: 8 Liked 54 Times in 27 Posts	Re: Ken Etter injured in an accident at Fontana It seems that the catastrophe started with the master cylinder push rod coming out. 67-72 GM A-bodies with manual brakes have a retainer like a cup plug with an O.D. flange that traps it between the cylinder and the firewall. The pushrod is flanged and won't fall through the center hole of this retainer. This part is hard to find these days, but should never be left out. Earlier single GM master cylinders use a big snap ring to hold a plate in the back end of the cylinder and trap the flanged rod. I don't know how Mopar, etc. do it, but some positive retention of the pushrod is clearly essential.