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PTO Coil overheating and shorting on Bolens 1700 (

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Ben

06-18-2003 17:56:08

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I have a 5017H with electric PTO. The last 2 times I have mowed, after about 30-45 minutes, the tractor shuts off. If I turn off the PTO I can restart the tractor. As soon as I turn the PTO on, the tractor shuts off - the circuit breaker (30 amp) is tripping.

If I test the resistance between the PTO coil wire and ground I get 0 ohms (shorted). If I let the tractor cool off for about 30 minutes, I get a few ohms of resistance and everything is fine until it heats up again.

I recently had the motor out and put new rings in and adjusted the timing. I didn't touch the PTO coil (I have replaced it in the past though). This didn't happen before (but it also didn't happen until several full mowings after I reinstalled the motor).

I don't know if it is getting hotter than it did in the past or if the coil is just going bad. I wasn't aware that coils could act this way. Should I replace the coil (it is quite expensive ~$100) and hope it goes away or should this behavour be expected if it is getting excessively hot?

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teej

06-19-2003 14:28:47

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Re: PTO Coil overheating and shorting on Bolens 17 in reply to Ben, 06-18-2003 17:56:08

The magnetic coil in the clutch is shorted. You can buy just the magnet, last time I bought one was 2 months ago, and was $160.

If you take the clutch apart, you'll see the magnet will be burned, and black where the windings are.

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Scott

06-19-2003 09:55:49

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Re: PTO Coil overheating and shorting on Bolens 17 in reply to Ben, 06-18-2003 17:56:08

It takes a coil about every 10 years and adjust the gap in the 3 slots to about .012 I believe.

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