Re: Bendix Treadle Vac Study- Serioius Business!!

Posted by HH56 On 2010/12/5 18:50:38
If we were to go back to the original purpose of this thread, Fred is putting together a survey. He would like to hear from anyone as to what happened and also is asking for any help in finding some recent units that have failed to see if we can get to the bottom of it. He has offered compensator valves to anyone who suspects a faulty one but until some get evaluated, all we can do is keep guessing. Anyway, an opportunity that we really should take advantage of and if anyone has a recent failure taken out of service they could help with, I think we would all benefit. There must be a few from those who have replaced with modern recently. The details on how to get it returned were posted on another thread but I think we can find them again if anyone speaks up.

Until we find some corroborating evidence on all the extra numbers, probably useless speculation to keep guessing as to what they are and will serve no useful purpose and just confuse the issue further. It does seem that the units were the same over the V8 and earlier years so doesn't look like any particular version can be faulted.

As to KevinAZ's unit, I'd say that's a P2 so would fit early production 55. The cap is interesting and I think bears out the theory that Bendix had a different one they sold as part of a complete newer unit or for other customers. I suspect Packard had a stock or had a bid spec from the original P unit they started with. Since there is only the one number listed in manuals from 52 on for the one we are used to, they kept those to the end and probably because of the thinness for going under the steering column.

If you turn that later cover around 180, I suspect it will be the type designed for that later gasket we have been commenting on and the tube will line up with the bleed port. The early gasket as shown on the other thread is for our covers.

Unfortunately, that cover is probably too thick and the fill port would be directly under the column and not removable if used as it's designed. That's most likely why it is reversed on this one. Could be any number of reasons why it's there, but doubt it came with the car.

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