ahuggins6
New Member
I have a Sullivan 210 CFM with a JD4045 engine that runs great but stalls after it has run for a couple hours. I use it in sandblasting.
This problem began after I had to fix a disconnected drive coupling. I started the engine one last time to blow a porch off after a little soda blasting and the engine roared in a wide open state--much faster than when trying to build air. I could tell it sounded like it had no load so I shut it off and fixed the coupler problem (with some modifications, I should never have this problem again. The next time the spline hub comes loose on the air end shaft, it will definitely be intentional.)
After putting the coupling back together and getting the machine running again, it runs seemingly perfect. Until one day it stalled when I let off the deadman switch (I call it the trigger). Sometimes when I let off the trigger, the tank reaches full regulated pressure, and the throttle control cylinder moves to idle the engine down. once the engine has reached idle speed normally, the engine then slowly continues to idle down until stalling. Other times it reaches and sits at low idle just fine and slowly stalls when I press the trigger switch. I have noticed the last several times I've started the engine from cold, it takes several, several seconds before the engine busts off and runs. But after it has stalled it takes even longer to start.
I have changed the fuel filter and air filters. My thoughts are that the governor has developed problems as a result of running wide open and some parts will need to be replaced. The question is, are there any other possible causes and for a guy that is very mechanically inclined who tends to teach other mechanics tricks in the shop, is this something I can fix on my own?
This problem began after I had to fix a disconnected drive coupling. I started the engine one last time to blow a porch off after a little soda blasting and the engine roared in a wide open state--much faster than when trying to build air. I could tell it sounded like it had no load so I shut it off and fixed the coupler problem (with some modifications, I should never have this problem again. The next time the spline hub comes loose on the air end shaft, it will definitely be intentional.)
After putting the coupling back together and getting the machine running again, it runs seemingly perfect. Until one day it stalled when I let off the deadman switch (I call it the trigger). Sometimes when I let off the trigger, the tank reaches full regulated pressure, and the throttle control cylinder moves to idle the engine down. once the engine has reached idle speed normally, the engine then slowly continues to idle down until stalling. Other times it reaches and sits at low idle just fine and slowly stalls when I press the trigger switch. I have noticed the last several times I've started the engine from cold, it takes several, several seconds before the engine busts off and runs. But after it has stalled it takes even longer to start.
I have changed the fuel filter and air filters. My thoughts are that the governor has developed problems as a result of running wide open and some parts will need to be replaced. The question is, are there any other possible causes and for a guy that is very mechanically inclined who tends to teach other mechanics tricks in the shop, is this something I can fix on my own?