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Deere D140 PTO

zinjanthropusSkypilot177

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A neighbor has a JD D140 maybe two years old. Engaging the electric clutch kills the engine. It sounds to me like resistance somewhere is dragging it down as it seems to stutter slightly before dying. But we can find no such resistance. Maybe an electrical interlock switch? Where would we look? Thanks.
 

AVB

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More likely with it being a v-twin that one cylinder is down. Either ignition, carburation or compression problems ( ie dropped valve). Quite common for these v-twins to run good until a heavy load is applied when one cylinder is offline.
 

AVB

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Let's try a little divide and conquer approach here.

Have you tried removing the deck drive belt from the PTO to make sure isn't a deck problem? If still doing it then we're looking at safety switch problem or massive electrical draw from the electric PTO coil.

To check if it is a safety that causing the problem simply unplug the PTO clutch electrical connector and test. If it still shuts down then it is a safety switch or wiring problem.

PTO coil with massive amount of current draw would cause the overall available voltage to drop so low that the after fire fuel solenoid on the carburetor would drop out and cause the engine shut down due the lack of fuel. I have seen these electric PTO draw over 15 amps and still work but would drain the electrical system to where the engine shutdown. Normally these pulls 3-7 amps depending on the voltage. Their coil resistance should not be below 1.6 ohms.
 

zinjanthropusSkypilot177

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Let's try a little divide and conquer approach here.

Have you tried removing the deck drive belt from the PTO to make sure isn't a deck problem? If still doing it then we're looking at safety switch problem or massive electrical draw from the electric PTO coil.

To check if it is a safety that causing the problem simply unplug the PTO clutch electrical connector and test. If it still shuts down then it is a safety switch or wiring problem.

PTO coil with massive amount of current draw would cause the overall available voltage to drop so low that the after fire fuel solenoid on the carburetor would drop out and cause the engine shut down due the lack of fuel. I have seen these electric PTO draw over 15 amps and still work but would drain the electrical system to where the engine shutdown. Normally these pulls 3-7 amps depending on the voltage. Their coil resistance should not be below 1.6 ohms.

Thanks for that very comprehensive reply. It was the safety switch. Skpilot177
 
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