Re: Bendix Treadle Vac Study- Serioius Business!!

Posted by fred kanter On 2010/12/31 21:34:38

although you have said you have replaced all related items, I'll go over possible causes. I suggest you go to THE source, the Packard service manual. Saves time, effort. speculation etc etc.

If the car has hard brakes and no single wheel locks up. it could be the power unit, but that is pretty well eliminated with all the units you have tried.

Vacuum source to BTV-vacuum valve at manifold
All wheel cyls frozen
Rubber hoses collapsed
Glazed linings
Linings having minimal contact, usually in center due to drums being machined too far oversize or incorrect thickness linings

good luck