Kevin:
Everything is AOK. The problem seems to be the way the muffler circuit heats the radiator, adding to the harsh conditions were the truck is working. There's a Cat P3500 working right beside this one, with no overheating problem at all. We'll try to insulate the muffler and pipes to see if heat transfer is reduced. Still would like to know if there is anything else can be done. Can we omit the temp thermostat altogether?
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