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Generators In this forum we will try to answer any of your questions about the different model generators that can be found on Blue Bird coach's.

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Old 05-10-2018
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Default Onan Cooling Fan

Is the Dayton part # 4M099 available at Grainger, given in this thread still the correct one to go with ?

https://www.wanderlodgeownersgroup.c...an%20Parts.txt

My fan motor has decided to quit need a replacement, the one that’s in there is a GE 5kcp39kg 3186s.

Anyone know if that was the original ?
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Old 05-10-2018
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4M099 is available on ebay and Amazon,
The GE may have different mountings to match your squirrel cage fan.
So, check if these two motors are interchangeable
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Old 05-10-2018
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Thanks Bill.

Did anyone need to buy a universal mounting bracket to go along with this motor ?

Could there be another reason the fan may run intermittently other than it failing, is there something in the control box that could be bad ?
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Last edited by Steelwheels; 05-10-2018 at 11:50 AM.
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Old 05-10-2018
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Quote:
Originally Posted by Steelwheels View Post
Thanks Bill.

Did anyone need to buy a universal mounting bracket to go along with this motor ?

Could there be another reason the fan may run intermittently other than it failing, is there something in the control box that could be bad ?
The start capacitor (it is not in the control box, not sure if it is on the motor or separate in your coach.
Could be an intermittent wire between the control box and motor (220 volts). It flexes when the gen is slid in or out and may just touch sometimes and not others.
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Old 05-10-2018
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capacitor or most of these motors have a thermal heat circuit breaker.
resets after cooling. Need to take it apart, motor shaft sometimes gets seized inside fan, then fan needs replaced.
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Old 05-10-2018
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I can get the Dayton here in town at Grainger, $84.00 should I just swap it out ?

Where is the capacitor ?
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Old 05-10-2018
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Quote:
Originally Posted by Steelwheels View Post
I can get the Dayton here in town at Grainger, $84.00 should I just swap it out ?

Where is the capacitor ?
starting capacitor , maybe try that first, cheap part, located inside the electrical
connection box. easy to find but under the bus, near fan
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Old 05-10-2018
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Be careful of the mounting bracket. The bracket that will be fine for the fan sitting in your home furnace, will not be robust enough to work bouncing down the road in your bird. Saw this first hand at Oshkosh many years ago when a furnace bracket bent and allowed the fan wheel to sag into the housing. Just make sure the replacement is as strong and rigid as the original.
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Old 05-10-2018
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I was going to replace the motor. My fan is stuck on the shaft pounded on it for a bit got it moving but couldn’t get it all the way off. A auto radiator fan looks like a much easier swap and fix.

Anyone have any negatives to report when switching over and have gone back to the original set up ?
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Old 05-10-2018
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I have an auto 12 volt fan on my 17kw powertec works well. Just make sure you use at least ten gage wire and a 30 amp relay.
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