Re: cummins 4bt cooling questions


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Posted by Mike Hernke (mo) [97.85.209.230] on Monday, April 27, 2015 at 08:09:52 :

In Reply to: cummins 4bt cooling questions posted by Bruce in BC [24.207.105.85] on Sunday, April 26, 2015 at 22:42:26 :

Mine had one installed in the return elbow from the radiator. Which to me makes sense the fan is keeping the radiator cool so by messing the water leaving the radiator you are turning on the fan only when there is not enough airflow through the radiator. The elbow has a boss and is tapped looks factory to me. I think my thermostat is 185-190 I would set the fan sonething like 145 off 170 on or thereabouts.

I actually have a manual switch for the fan because i have fried at least 3 relays including a continous duty starter solenoid. Never tried to power the fan directly through the switch. I even had a 50 amp switch come apart. Fans pull a lot of power continously while running.



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