1999 Sullair 185 stops after 30-45 minutes of blasting
by Shelton Hallmark
(Central, Texas, USA)
I have a 1999 Sullair 185 with a john Deere diesel I bought used. The clock has less than 1500 hours. I've changed all the fuel filters, oil filter, engine oil (Rotella), and compressor oil (straight 10w). It starts and runs good, good clean steady pressure.
My problem is it shuts of after 30-45 minutes of blasting. I try to start it and it will turn over but not run. I am assuming that it is getting hot and throwing a switch. It did not come with a temperature gauge. It has plenty of water with antifreeze.
Is this a common problem?
What are the probable causes?
Is it an easy fix?
Things that come to my mind are:
Could it be the 10w oil in the compressor making it hot?
It could be a thermostat. Is that an easy fix?
It could be the radiator or maybe the oil cooler?
I have the panel in-front of the radiator/cooler off and the side panel doors open when I run it. Could that have a bearing on how it cools?
I don't know anything about diesels so any guidance would be appreciated before I have to spend a arm and a leg at the John Deere dealer. That's if they will even work on a Sullair.