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Thu Mar 05, 2009 3:50 pm

I'm putting a 67 dual circuit MC in my 64 Micro. (Yes, I've read about the other various ways to go with later year cheaper MC's etc, but have decided on going this route.) The problem I keep reading about is that the 67 MC differs from all the other years as it has both a different length pushrod AND a different tip on the end that goes into the MC. (the picture posted on Samba shows a ball end vs the typical simple rounded end)
Has anyone else worked around this issue? Does anyone know for sure what the length of the 67 pushrod is? No manual I have come across spells it out. Has anyone successfully made their own pushrod for a 67 so that it works BOTH circuits?

Thu Mar 05, 2009 4:50 pm

not a great picture, but it may give you an idea...

Fri Mar 06, 2009 6:11 am

Michael11 thanks for the photo.

I spoke to Wolfsburg West yesterday about the pushrod problem. They sell the master cylinder and the reservoir but not the pushrod. The technical advisor I spoke to was unaware that there was any difference between the 67 pushrod and those of the other years. He assumed that they were interchangeable, which is clearly not the case. I have to wonder if there are a group of 66 and earlier buses cruising around with the added 67 master cylinders that are disasters waiting to happen.

Fri Mar 06, 2009 6:54 am

Jons nice side by side comparison photo.

Fri Mar 06, 2009 7:43 am

how many people need these pushrods? I was taking mine out this past weekend for repair with my brother-in-law. He has a full machine shop and said he could probably crank these things out in no time. I know people have made the rod in the past with a re-shaped machine bolt. He could do that, though turned on a lathe, and probably make the bracket that it screws into if needed. I don't need one, though mine is beat up, but if there is enough demand I could make a call and see what we're talking about here.

Fri Mar 06, 2009 12:15 pm

I don't even need one, but I'd pick up 1 just to have lying around.

As a side note, though, I ground the tip off of one about 5 years ago to shorten it to use on an earlier bus because that's all I had lying around. :lol:

Fri Mar 06, 2009 12:22 pm

question about the 67 pushrod, the one on the right in the photo above: why the relieved shaft with the ball on the end? Why not just straight like the other two? Having just removed mine and testing it with other masters I can't see a need for it.

Fri Mar 06, 2009 1:13 pm

i could use a push rod for my bus (1965) with 67 master cylinder in it..

Fri Mar 06, 2009 10:00 pm

The main difference in the 67 pushrod and clevis is that they're just a little more heavy duty. If you look at the threaded end of the rod at the clevis, you can see that the 67 rod is a size larger than earlier and has fine threads. The clevis is bigger where it's threaded and longer too, but the ball end of the rod is turned down to the original size where it contacts the master cylinder. Obviously some VW engineer wanted it just a bit stronger to use with a dual master.

Sat Mar 07, 2009 5:39 am

dstefun wrote: The main difference in the 67 pushrod and clevis is that they're just a little more heavy duty. If you look at the threaded end of the rod at the clevis, you can see that the 67 rod is a size larger than earlier and has fine threads. The clevis is bigger where it's threaded and longer too, but the ball end of the rod is turned down to the original size where it contacts the master cylinder. Obviously some VW engineer wanted it just a bit stronger to use with a dual master.

use a 67 beetle and newer rod by tapping the clevis to 10MM fine thread. the beetle has a cast/forged piece that is not a clevis but has the ball end and necked rod as 67 bus has. this is what i did. the bus non profiled rod end is 8 MM x 1.25 thread.