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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Oct 2010 Posts: 8 New Guy | | New Guy Joined: Oct 2010 Posts: 8 | When I bought my 46 several years ago I drove it for a few months before the restoration began. The hydro-vac unit was not in service and the vacuum line had been capped. Although it would stop, it took a lot of force on the pedal and a lot of planning. I am close to getting the old girl back on the road and would like to pluck everyone's brains. Here it goes, first of all how well do the old hydro-vacs work? Are they difficult to work on or find rebuild parts for? Am I better off using some newer technology, and if so what would be the best fit? Thanks to all your advice, it is awesome!!! | | | | | Joined: Apr 2010 Posts: 474 Shop Shark | | Shop Shark Joined: Apr 2010 Posts: 474 | The hydro-vac works great in my 53 4400 .I'm happy with the factory braking.The vac can be rebuilt and there are rebuilt units with your core available. | | | | | Joined: Oct 2010 Posts: 8 New Guy | | New Guy Joined: Oct 2010 Posts: 8 | I had my 46 Two Ton hydro-vac rebuilt by REMAN, Inc., 515 Ralph David Abernathy Blvd, Atlanta, GA 30312, phone 404-659-8723. It was a little pricey I thought (almost $300) but it works great and makes all the difference. | | | | | Joined: Feb 2007 Posts: 190 Shop Shark | | Shop Shark Joined: Feb 2007 Posts: 190 | Had mine rebuilt and it's got the best brakes of any antique I have ever owned. The little master cylinder is a little spooky, but so far - I have been very pleased, good luck with your's. | | | | | Joined: Sep 2001 Posts: 581 Shop Shark | | Shop Shark Joined: Sep 2001 Posts: 581 | I've always been a little confused by this topic:
Is what you're talking about truly a "Hydro-Vac", or is it really just a vacuum-assist? My '41 ton and a half has the vacuum assist on it, which is great, but it's not actually a Hydro-vac, as I understand it, because it doesn't actually hold or push any brake fluid. It's simply a mechanical (vacuum) force multiplier for the master cylinder. I am thinking true Hydrovacs came after '46. Not to say one couldn't have been added on post-purchase, of course.
I bring it up mostly because a true Hydro-vac would be probably a couple hundred more to get rebuilt, as they're more complicated. I like the vacuum assist ones, as there's no bleeding necessary, and they're quite simple.
Or at least, that's what I think . . . anyone care to correct me?
-Michael | | |
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