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The PTO seems to stop running for no apparent reason. You turn it off and then back on. It seems like there may be an issue with the electric clutch that drives the blades. Any thoughts on what to do? Should I replace the electric clutch? Where do I get one at a reasonable price?

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Probably not the clutch. sounds more like a bad ground or a bad switch or both.

Posted on Jun 30, 2009

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Electric clutch wont engage when when switched on even though I can hear a clicking sound at the clutch.


PTO Clutch will not stay engaged.
There is a very fine one page discussion on evaluating electric clutches at this site:

http://www.messicks.com/Articles/FixingElectricClutch.aspx

My JD tech manual, which covers the entire LA 100 series, agrees with the electrical specifications. It states that the Electric PTO Clutch should show the following:
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Basically your PTO is an electro magnetic clutch....when power is applied (12 volts) from the battery, the magnet is energized and the two plates come together and you have then energized your PTO clutch and it should drive the V-belt....so If you disconnect the power to the magnet the magnet becomes denergized and the two plates move away from one another ,thus the v-belt stops turning .
It could be the switch,or more than likely it is a "relay" that has gone bad ,ie, the contacts on the relay have become pitted with use and stick when they get hot from use....thus when you disengage the PTO switch the relay stays in contact thus delivering power to your PTO clutch .....if you have a wiring diagram of your unit you should be able to find the "safety or PTO relay" again this is just my theory!
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