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Discussion Starter · #1 ·
First time post here, mainly because I have a problem.

I have a 4 cyl JD Sullivan Paletek compressor that stalls after it has run for a couple hours on the job. It will usually stall when I let off the trigger. When the compressor reaches full pressure and the engine has idled down to idle speed, it continued to slow until it stalled out.

It also has done it a few times when I press the trigger. When the compressor kicks in to make air, it cannot recover from the load and stalls.

This problem started after I cranked the engine and it soared wide open for a second until I realized what was happening and killed it. Turns out that the drive coupling came loose. The spline hub on the air end shaft loosened up and backed out of the splines on the flywheel side. The stalling problem started after this was fixed.

I'm looking to sell this machine to a potential buyer, but I only want to sell it if it's going to run right for a long time to come. It's a good machine set up with a pot for soda and a pot for abrasives. I wish I had more time to devote to running it, but I have a full time job that pays very well and I may be getting an even better (like, WAY-better-make-a-real-long-career type) job soon requiring me to live 2 hrs away during the week, which will cut my time for weekend extracurricular business to none--the little boy at home is going to want to see his daddy. (and visa versa)

I've read about checking the glass ball fitting on the return line and it has been clear twice that I've checked it. Has anyone dealt with this and what did you have to do to fix it? Thanks in advance for the help.
 

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Discussion Starter · #4 ·
Dyer, thanks for the suggestions but I've already been thru all that. I've determined that this has to be in the governor in the injector pump or the injectors are stopped up.. but the latter would not be right because when it's running it runs great.

Rusty I'll check into that forum when I have time. Thanks very much.
 

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Discussion Starter · #6 ·
The throttle control cylinder is working just as it should. I even took it loose from the pump throttle arm and operated the machine by hand. Same results.

It might be an electrical issue, but I've read so many threads where people deal with the same type issue, but they never come back and tell how they fixed the problem... I guess in the long run, that's all I want to here--how did someone fix this problem?
 
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