Packard Forum Index » V-8 (1955-56)

On my 1955 Caribbean there is a Vacuum reservoir under the drives side fender. Question is what hose does supply that vacuum reservoir and where does it lead to. A little information on that would be appreciated.
By the way, the information I received last week on the vacuum for the washer motor worked out great. Thanks for the help!

The reservoir is for the power brakes. You should be able to follow the hose down to the brakes and the "T" connection there and then follow the hose up to a fitting on the back of the carburetor.

thanks for the help... now is there somewhere a Vacuum Diagram avalable on line that shows the set up?

Perhaps, but you really shouldn't need it, it's as simple as Randy says. The line originates at the carburetor base (intake manifold on some models/years), goes to the power brake booster "T" and continues on from there and terminates at the reservoir tank.

I don't recall seeing a published brake vacuum diagram for 55-6 -- just one for wiper/washer setup. There is a diagram applicable for most 52-4 brakes in Service Counselor Vol26 #5. Route is slightly different on V8s though because of engine and newer BTVs.

As Randy and O_D mentioned, very straightforward. Comes off the check valve at rear of carb, slight loop back to firewall and then toward drivers side. Goes under the accelerator bracket. There may be a clamp in that area. Mine then dips down slightly but crosses above steering column into the tee. A short length drops down to BTV connection and rest continues on below fresh air vent and emerg brake mechanism to come up again with a vertical stretch into the reservoir.

Tried a picture which isn't much help because of the stuff in the way so here is a sketch as mine is. Hopefully, it is correctly done and is the same on all. My car has fact AC so some things are located a bit differently.

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Howard you are missing a lot of parts forward of the firewall!

You noticed! I thought Packard put too many extraneous things on so thought I'd see if it would work without some. It didn't very well and there was a draft.

Thanks a lot to all of you. You been a great help and i am sure i will call on you again before the project is done.
Walter