Nickey Posted July 21, 2020 Share Posted July 21, 2020 I'm a new member. Worked for a Mack dealership in the 80's. Bought a 87 R model and restored it. Been hauling logs with it. Started to run hot as summer started. Around 215 on a pull. Warning buzzer comes on at 210. Had radiator rodded out, changed fan clutch, replaced thermostat, removed oil cooler and cleaned it, removed water pump and inspected it. Still running hot. It's got fuel turned to it. Runs 24 psi on boost. Also pressure checked air to air. Checked fine. Can someone think of anything else to check. Thanks Nick Quote Link to comment Share on other sites More sharing options...
1965 Posted July 21, 2020 Share Posted July 21, 2020 Sounds like you’ve checked it good, how well do you know who rodded the radiator, did you see it yourself? Do you have pyrometer? Quote Link to comment Share on other sites More sharing options...
Nickey Posted July 21, 2020 Author Share Posted July 21, 2020 Saw the finished radiator. Looked good. Don't have a pyrometer. Puff eliminator is disconnected. Really think fuel is turned up too much. Smokes alot on gear shifts. Starts to heat up as soon as you start pulling a grade. I've had the top of the governor off. Adjusted that fuel setting down a couple of flats on the nuts. I just can't remember anymore fuel adjustment on the governor. Quote Link to comment Share on other sites More sharing options...
Dirtymilkman Posted July 21, 2020 Share Posted July 21, 2020 I would re-core the radiator. Its fairly cheap and easy. Also make sure your fan shroud is all there so your pulling enough air through. Quote Link to comment Share on other sites More sharing options...
fjh Posted July 21, 2020 Share Posted July 21, 2020 11 hours ago, Nickey said: Saw the finished radiator. Looked good. Don't have a pyrometer. Puff eliminator is disconnected. Really think fuel is turned up too much. Smokes alot on gear shifts. Starts to heat up as soon as you start pulling a grade. I've had the top of the governor off. Adjusted that fuel setting down a couple of flats on the nuts. I just can't remember anymore fuel adjustment on the governor. long as it cleans up when pulling I believe you'll be ok in that department! i'm Thinking the same as milkman Is likely the rad or the fan hub by what you discribe! Quote Link to comment Share on other sites More sharing options...
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