Problems with bleeding on Wagenswest Rabbit dual master cylinder

[Don66bus]

More brake questions ...

I bought the dual master cylinder for a Rabbit from Nate to upgrade the original single MC on my '66 bus. It fit fine but my mechanic could not get the air out of the front lines. He has 40-50 years of experience and all the tools one could need, and he spent 2 hours trying pressure and vacuum and good old pumping the pedal bleeding operations. The front lines always kept some air. He put the original single MC back in and got a firm pedal in 5 minutes.

It is possible that it the dual circuit MC I received is defective and Nate will return my money or replace it with no problem. However, the one thing my mechanic did not check is changing around the brake lines to different ports on the dual MC. My question are: has anyone successfully installed this unit in their '64 to '66 bus and, if so, what brake lines did you connect to what ports?

Thanks.

[Eric&Barb]

Even if you connect up the wrong brake lines to the wrong ports it will pressure bleed the system and function. You just want the front lines to be nearest the brake pedal and the rear line farthest away from the pedal end of the MC. Real easy to mix up the rear line with the LF line since they do run back several feet side by side.
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[vwuberalles]

Sounds like what was happening with the brakes on my dad's 59 bug when he went to front disks. I think he ended up having to use a different master cylinder to fix it, but I don't know what one he used and if it'd be the same on a bus.

Also, if the Rabbit MC is in fact doable on a bus, would it work on my 67?
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[Eric&Barb]

Personally never heard of using a Rabbit MC. Maybe you mean it is a Bus MC with Rabbit reservoir?
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[Don66bus]

It is apparently a Rabbit master cylinder. Here is the listing. It is the smaller of the two offered:
http://www.wagenswest.com/partstore/index.php/1955-67-dual-circuit-bus-master-cylinder-kit.html

There are four open ports: two for the front brakes, one for the combined rear brakes, and one for the brake light switch. It may be that some combination works better than what we already tried. That is why I am interested if anyone on the TheSamba has made this work.

[Eric&Barb]

Interesting! Thanks for posting that.
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[David Raistrick]

[Don66bus]

Yes, the rod had the right free play.

I'm hoping that someone here has installed this unit in their bus and it works. If that is you, tell me what lines were connected to what ports.

Thanks

[jehugarcia]

having the exact same problem with the exact same cylinder. but Ive yet to try the right amount of play.
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[motofly196]

Just call Nate, he always treats his customers right. Wouldn't that be easier than getting all kinds of different opinions here?
I'm using a Bay Master with a Rabbit reservoir, so I'm no help either.

[nemobuscaptain]

Any follow up from you folks?
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