haste maker
alabama
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Joined: 05/29/2009
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I hate to say this, but cleaning the slip rings wasn't my gen. problem, I thought after running it for 24 hours under load that it was fixed, but yesterday it quit after 20 minutes, I talked with Flight Systems today & they gave me a plan on how to check and see if the board is getting to hot, the said when it quits again to spray the board housing with key board cleaner with the can turned up side down, this will cool the board & then see if it will restart.
It wouldn't restart yesterday after it quit, but did start right up this morning.
Retried Teamster
2007 Allergo
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bounder39zman
SC
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Joined: 03/19/2014
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I have used the "Slick Stick" a bunch. worn a couple out. If the slip rings are only slightly oxidized/worn you can clean them. I usually cut a piece of green scotchbright pad to fit end of a paint stir stick or chopstick, tape it on with elec tape. This works well on older Emerald, Marquis, and newer 5.5 and 7 kw sets. Just remove brush block for access to rings. You dont specify what model of 4K Onan you have, but likely a 4KY Microquiet. the brushes are behind fan/flywheel and will require some disassembly to access brushes on this model
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haste maker
alabama
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Joined: 05/29/2009
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I took my generator problem to Cummins & they found a bad board, in my unit.
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fourthclassC
MA
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Joined: 06/09/2005
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Howdy,
I fixed my generator. Finally got a piece of time to work on it. YOU All were right. It was an overheat situation. Found a lot of mouse nest stuff directly below the circuit board. And alot elsewhere, some around the throttle / governor linkage. So I appreciate all your advice and it saved me the price of that cleaning stick. Most of all I learned a lot of good stuff from you. I thought the fuel pump was only sensitive to high temp shut off. But it makes sense that there are other temp sensors.
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