The simplest way to bleed a hydrovac unit is to put a pressure bleader on the master cylinder. (this supplies brake fluid and about 50psi to the cylinder. Now every wheel cylinder, and bleeder on the Hydrovac, will allow fluid to come out with no pumping. The frozen bleeders can be blead (from the hose in some cases, or taken apart at the drum to allow air to be removed with the piston removed from one end. (do not use the power bleeded for that!) a hydrovac cannot be judged as bad untill it has been bled of all air. It just will not work, and appears to be bad. Do not condem it till bled. Jim
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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