Pete Phillips Posted January 26, 2017 Share Posted January 26, 2017 This NOS Hydro-Vac booster is in a group of Buick parts I recently bought. It is in a Buick parts box and someone has written "1957 all" on it, with a Buick parts number. I have never seen nor heard of one of these on a '57 Buick, or on any Buick for that matter. I've seen them on other late 1950s cars, such as a Studebaker Hawk I once owned. Has anyone ever seen one of these on a Buick?f This one was marked "Power steering Hydrovac" but they obviously meant Power Brake Hydrovac, so I wrote the correction. Pete Phillips, BCA #7338 Link to comment Share on other sites More sharing options...
lancemb Posted January 26, 2017 Share Posted January 26, 2017 Never ever have I seen that on a 57 Buick. If that's what it's for it must be aftermarket... Link to comment Share on other sites More sharing options...
NTX5467 Posted January 27, 2017 Share Posted January 27, 2017 According to www.brakeboosterrebuild.com, there should be an ID tag in a particular location. Personally, I'm a little leery of handwritten part numbers and such. Accuracy can be variable. "4.901" is the correct "group" number. www.fusickautomotiveproducs.com has a unit on their page which notes "1956-59 Buick". Looks similar. Link to comment Share on other sites More sharing options...
buick man Posted January 27, 2017 Share Posted January 27, 2017 … yes it is a hydovac for a propane tank…. 1 Link to comment Share on other sites More sharing options...
d2_willys Posted January 27, 2017 Share Posted January 27, 2017 1957 Cadillac's used Bendix Hydrovacs. Perhaps that is what it is for. 1 Link to comment Share on other sites More sharing options...
JamesBulldogMiller55Buick Posted January 28, 2017 Share Posted January 28, 2017 (edited) this for a 53 - 55 Cadillac , Hydrovac also is used in Chevrolet and GMC trucks http://www.ebay.com/itm/1953-55-CADILLAC-HYDROVAC-POWER-BRAKE-BOOSTER-REBUILT-316-/401095010115?hash=item5d63202743 Edited January 28, 2017 by JamesBulldogMiller55Buick (see edit history) Link to comment Share on other sites More sharing options...
tompett Posted January 28, 2017 Share Posted January 28, 2017 Accessories listing; 1957 Buick: 4.901 981866. Hydrovac Power Brake - Package for Buick. (Includes all necessary parts for installing Power Brakes on 1957 cars). Also in 1956 Buick: 4.901 981825, Hydrovac Power Brake kit (Packaged for Buick). I have seen parts at Hershey, but never installed on a Buick. Tom 3 Link to comment Share on other sites More sharing options...
JohnD1956 Posted January 28, 2017 Share Posted January 28, 2017 Just for fun, how about a poll yes or no vote on this question: If you were a judge at a BCA meet, would you take off points if the subject car had one? Link to comment Share on other sites More sharing options...
lancemb Posted January 28, 2017 Share Posted January 28, 2017 7 hours ago, tompett said: Accessories listing; 1957 Buick: 4.901 981866. Hydrovac Power Brake - Package for Buick. (Includes all necessary parts for installing Power Brakes on 1957 cars). Also in 1956 Buick: 4.901 981825, Hydrovac Power Brake kit (Packaged for Buick). I have seen parts at Hershey, but never installed on a Buick. Tom Wow so this is legit? Anybody know how these performed compared to the treadle vacs? Link to comment Share on other sites More sharing options...
Pete Phillips Posted January 31, 2017 Author Share Posted January 31, 2017 Wow, nice going "tompett". I would have deducted points if I saw one on a '57 Buick, but not now! I have seen them on 1957 Cadillacs. Pete Phillips 1 Link to comment Share on other sites More sharing options...
NailheadBob Posted April 2 Share Posted April 2 I know this a very OLD post BUT, and I see the Group #4.901 part #918866 fits 1957 & 1958 Buicks (it is listed in the 1958 Buick Accessories manual/book). @Pete Phillips, is this still available? Cadillac used this from 1950 thru 1954 Group #4.5000 Brake Package, Power (HYDROVAC) part #1462266 1950-1953, and part #1462157 for 1954, I know part number is different from Buick (maybe because of attaching brackets and parts) BUT booster unit looks Identical.. Bob Link to comment Share on other sites More sharing options...
Pete Phillips Posted April 3 Author Share Posted April 3 Yes, I still have it. 1 Link to comment Share on other sites More sharing options...
NailheadBob Posted April 3 Share Posted April 3 Thank you Pete, I will let you know. Bob Link to comment Share on other sites More sharing options...
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