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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!
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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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