Icehole Posted 3 hours ago Share Posted 3 hours ago 1990 R Model (RD688) with 400 E7. Fired it up yesterday after been sitting about a year and only will make 40 psi. Governor is leaking out the bottom (vent?) RD2? Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/ Share on other sites More sharing options...
Icehole Posted 3 hours ago Author Share Posted 3 hours ago 2nd pic Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582165 Share on other sites More sharing options...
Icehole Posted 2 hours ago Author Share Posted 2 hours ago Sorry, I meant D2. Typo. Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582167 Share on other sites More sharing options...
Joey Mack Posted 2 hours ago Share Posted 2 hours ago shut the engine, remove the intake on the air comp head and spray some penetrating oil in the ports and start the engine with the intake off. it may have sticking unloader valves. you can spray a little shot while running it, but just spray small shots, not a steady stream. D-2 Gov's are cheap, so you may need one if it is sticking as well. Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582168 Share on other sites More sharing options...
Geoff Weeks Posted 2 hours ago Share Posted 2 hours ago (edited) Replace the gov, Unloader only gets air from the gov. Had it happen many times with stuff that sits. If compressor valves are stuck in the unloaded position it will not build air at all. Edited 2 hours ago by Geoff Weeks Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582169 Share on other sites More sharing options...
The Heinz Posted 2 hours ago Share Posted 2 hours ago I had a Canadian R model from 1990 that I used to look up, and those governors are available should you end up looking for one. Just about everybody has a version, Bendix, Wabco, etc. Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582170 Share on other sites More sharing options...
Icehole Posted 1 hour ago Author Share Posted 1 hour ago Yes, trying to figure what Governor it is so I can replace it. Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582173 Share on other sites More sharing options...
Geoff Weeks Posted 1 hour ago Share Posted 1 hour ago (edited) D-2 Pretty much an air gov is an air gov, you can put any kind on there. Bendix, Midland, it doesn't matter. Edited 1 hour ago by Geoff Weeks Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582174 Share on other sites More sharing options...
Geoff Weeks Posted 1 hour ago Share Posted 1 hour ago (edited) Air governors from top to bottom. Old Bendix, Midland front, Midland rear, Bendix D-2 Edited 1 hour ago by Geoff Weeks 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582181 Share on other sites More sharing options...
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