PSW Fix-it Posted 2 hours ago Share Posted 2 hours ago Anyone have or have a link to manuals for this Hydrovac brake booster? Also wondering if there supposed to be lubricating oil in those units? My old Motors manual makes mention of adding "vacuum cylinder oil" to some units after rebuilding. Plus, our unit has 2- 1/8" plugs in the back section which look to be in a position to add oil & drain it out + where would oil be added if it is needed? It's used on our 1961 B95 open cab fire truck Thanks all! Quote Link to comment https://www.bigmacktrucks.com/topic/75976-manuals-for-hydrovac-tandem-9-12-brake-booster/ Share on other sites More sharing options...
Geoff Weeks Posted 1 hour ago Share Posted 1 hour ago Neatfoot oil could be a substitute. Just a little to keep the piston seals supple. http://www.90thidpg.us/Reference/Manuals/TM 9-1827B.pdf https://www.abebooks.com/Bendix-Hydrovac-First-Second-Series-Service/31992141638/bd best I can find at the moment. Quote Link to comment https://www.bigmacktrucks.com/topic/75976-manuals-for-hydrovac-tandem-9-12-brake-booster/#findComment-583150 Share on other sites More sharing options...
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