Re: Treadle vac disassembly snag

Posted by HH56 On 2019/5/30 12:25:25

That Cadillac place has a nice assortment of parts including some power window switches. I believe I remember reading that era Cadillac used the same switch as 55-6 Packards but different cosmetics. Does anyone know if that is true? If it is and if the Cad switches might be able to mount in the Packard bezel with minimal difficulty -- even if the switch button look might be a tiny bit different -- that would be a huge thing to know.

If I remember, Kanter also has a deluxe BTV rebuild kit that includes the ram but don't know if he has one with most of the power piston components as is shown in the link Don posted. Still missing the poppet parts but Ross has mentioned how he repairs those when needed. It does have the conical compensator valve spring that others have thought needed to be a part of all rebuild kits so definitely a more complete kit than I have seen from our vendors. The BTV repro master casting raises a question. It was pointed out by another poster that some of the repro castings do not have the relief port. I don't know if that is one of them but I don't see the relief port flush with the top. Unless it is lower down like the 52-3 BTVs and out of view in the photo, as we have seen when they become blocked in the Packard BTVs that is an important detail not to have and I would wonder if it was a suitable replacement if it does not have one.

There were several BTV versions that came along during their production. Packard only used two of the earlier types but other cars used models with different feedback methods and sensitivity control. Mounting was similar on all as far as I know but I wonder if the castings without a relief port might be for a different or later version than Packard used.