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mquiring
Senior Member

78 Posts

Posted - 09/17/2019 :  07:29:46 AM  Show Profile  Visit mquiring's Homepage  Reply with Quote
Is there an easy way to check the fan on an 09 All American RE? I have two of them and one runs hotter at both the engine and transmission than the other. Didn't know if there was an easy way to check fan engagement without having software to do it.

Bluenozer
Advanced Member

Canada
238 Posts

Posted - 09/18/2019 :  08:14:27 AM  Show Profile  Reply with Quote
run both and check temp with a heat gun and when fans come on compare readings
electric or electric clutch or air clutch engine fans?
electric- sensor or wiring
electric clutch- sensor, wiring or clutch material
air clutch- clutch material, air regulator , wiring sensor
all three have little tricks to check operation
or it could run hotter due to a malfunctioning thermostat

OEM trained in wiring and all engine platforms for 20 years
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mquiring
Senior Member

78 Posts

Posted - 09/18/2019 :  09:20:52 AM  Show Profile  Visit mquiring's Homepage  Reply with Quote
This is an RE with the hydraulic drive fan. Wasn't sure if I could just hot wire the solenoid on the hydraulic valve block to make the fan run full speed?
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671Fan
Active Member

14 Posts

Posted - 09/18/2019 :  10:02:06 AM  Show Profile  Visit 671Fan's Homepage  Reply with Quote
On the older birds they were wired to run the fan with no power at the solenoid. Just unplug it and that should give you full speed.
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krmvcs
Advanced Member

351 Posts

Posted - 09/18/2019 :  1:15:46 PM  Show Profile  Reply with Quote
Ditto on the other guys. Hydraulic powered fans usually default to full speed if theres an electrical fault so just unplug it and see if the fan speeds up. If its still running hot (and youve ruled out tstat, dirty or blocked radiator, etc.) then you might be looking at a hydraulic problem. A digital laser tachometer is handy for checking things like fan speed. And since you have a good running unit you could test both and compare your findings. Just for fun too you could run the fan at full speed and see if your steering is stiff too. If so that would be more evidence of a hydraulic issue.

-Ken-
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mquiring
Senior Member

78 Posts

Posted - 09/18/2019 :  1:20:33 PM  Show Profile  Visit mquiring's Homepage  Reply with Quote
Thanks for the tips, I'll give it a try. Thanks!
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