Icehole Posted September 5 Share Posted September 5 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 September 5 Author Share Posted September 5 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 September 5 Author Share Posted September 5 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 September 5 Share Posted September 5 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. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582168 Share on other sites More sharing options...
Geoff Weeks Posted September 5 Share Posted September 5 (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 September 5 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 September 5 Share Posted September 5 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 September 5 Author Share Posted September 5 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...
Solution Geoff Weeks Posted September 5 Solution Share Posted September 5 (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 September 5 by Geoff Weeks 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582174 Share on other sites More sharing options...
Geoff Weeks Posted September 5 Share Posted September 5 (edited) Air governors from top to bottom. Old Bendix, Midland front, Midland rear, Bendix D-2 Edited September 5 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...
mechohaulic Posted September 6 Share Posted September 6 not knowing why it sat for year and a half OR WHY it has been started NOW :: my personal recommendation is to slightly tap it while running to see if it corrects itself. this unit going into service ??? THEN put $$$ into it. put new governor and misc. $$ into so it can sit another year is like a government operation . 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582206 Share on other sites More sharing options...
Joey Mack Posted September 6 Share Posted September 6 Yeah, i guess so. I only suggested a few squirt's of lube in the intake, to free them up.. of course, the governor is likely stuck, are they still under $30.00 ? . It sat for a year.... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582208 Share on other sites More sharing options...
Popular Post Brocky Posted September 6 Popular Post Share Posted September 6 For the last picture Geoff posted you can pop off the rubber cover, and with NO AIR PRESSURE in the system, Pop out the snap ring behind the rubber cover and pull the plunger and spring out. Then clean all the parts and barrel good with WD=40 or similar. I have done this along side the road to get back under motion!!!!! 6 Quote Brocky Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582236 Share on other sites More sharing options...
Icehole Posted September 6 Author Share Posted September 6 (edited) 15 hours ago, mechohaulic said: not knowing why it sat for year and a half OR WHY it has been started NOW :: my personal recommendation is to slightly tap it while running to see if it corrects itself. this unit going into service ??? THEN put $$$ into it. put new governor and misc. $$ into so it can sit another year is like a government operation . Not sure where that info is from? I said it's been sitting about a year. I parked it maybe November last year. Hasn't been used because I've been busy. Have only been home a few weeks this summer and other stuff needed done. Winter I worked a month out, 2 weeks home, and worked another job on those 2 weeks. Doesn't cost me anything for stuff to sit. Have several other trucks and equipment that isn't used much but when is needed is handy to have. Edited September 6 by Icehole 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582244 Share on other sites More sharing options...
Geoff Weeks Posted September 6 Share Posted September 6 What I don't see (may be there, I don't see in the pictures) is a signal line to an air drier for purge. Does this truck have an air drier? Moisture and oil/gunk from the wet tank can get back to the governor if the tanks aren't drained EVERY day when in use, without an air drier. I, for one, can never be bothered to drain tanks every day. I had air driers on my stuff and never had a problem until the drier had some sort of problem. If you don't have a drier, they are not hard to install to limit future problems. You may get it to work by cleaning as Brocky recommends, but if you don't address the source of the problem, it may stick the next time you need the truck. Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582245 Share on other sites More sharing options...
Joey Mack Posted September 6 Share Posted September 6 The gov. Is mounted on the compressor. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582254 Share on other sites More sharing options...
Geoff Weeks Posted September 6 Share Posted September 6 (edited) 57 minutes ago, Joey Mack said: The gov. Is mounted on the compressor. Air drier still need a signal from the gov to the air drier. That means two lines, one for the air pressure from the wet tank, and the 2nd for a purge signal to the air drier. That line comes off the middle port. Same port that goes to the unloader port on the compressor. He may have one hidden behind the intake piping, I can't see. Edited September 6 by Geoff Weeks 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75928-what-governor/#findComment-582259 Share on other sites More sharing options...
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