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Tractor Talk Discussion Forum

fans control on 4430 jd

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ji malla

06-30-2006 18:48:31




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what mode of operation do the fans work on a 4430 it has 3 speeds . only 1 blower works on medium do they all work all the time on 3 speeds.jim




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Illinois

07-01-2006 07:07:59




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 Re: fans control on 4430 jd in reply to ji malla, 06-30-2006 18:48:31  
I had a 4230, basically the same cab. One motor became a little harder to turn, when on lower speed setting, it would stall and the other motor would see full voltage. Result was on high speed both would run full speed. On slower speed setting one would completely stall, the other would run full speed.

The fix is to replace the motor that is dragging.



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Bob

07-01-2006 00:27:43




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 Re: fans control on 4430 jd in reply to ji malla, 06-30-2006 18:48:31  
At the "LOW" speed setting, the fan speed switch connects the 2 fan motors is "series", and they BOTH run at reduced speed.

At the "HIGH" speed setting, both motors receive full battery voltage from the fan speed switch, and BOTH run at high speed.

If the system is functioning in any other way, there is s problem with one fan motor, the speed contol switch, or the wiring.

Laster SGB's have ONE large fan motor (with 2 blower wheels) and use a resistor setup for speed control.

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