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Old 03-25-2024, 07:38 PM   #10
dsraven
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Join Date: Nov 2010
Location: calgary alberta
Posts: 7,918
Re: 1958 Apache 3800 Hydrovac

hydrovac is different than hydroboost. hydroboost uses hydraulic pressure, hydrovac uses vacuum. it can be a little confusing if you haven't seen or heard of a hydrovac unit. mostly medium size trucks used them and called them that. just google it for a bunch of history, diagnosis, repair info. you might even get to hear the dude that gave the shop class video narrative from the 70's. hha.
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