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Took the coach to Caterpillar in Springfield Missouri to evaluate the engine cooling system. The technician determined the cooling system was functioning normally and recommended changing the regulator to a 180°-200°. 

The thermal switch I installed is calling for fan high at approximately 212° coolant temp and resets fan to low at 204°.


I’ve installed new fan blades and pitched them to 27.5°. 



I believe the only way I can completely solve the cooling problem is pulling more air through the radiator. I can only pull more air with a new hydraulic pump driven by the transmission. That project is ongoing.

I am guessing you are looking at a PTO drive off the transmission? I was going to recommend this on your other thread, as the PTO drives typically are close to 2 to 1 on the output so you can really move some fluid. Just have to make sure you do not overdrive the fan past its recommended max RPM.