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Engine dies when engaging PTO switch on a John Deere GT235. I have replaced the seat switch and the PTO switch.

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  • brettww May 11, 2009

    Engine dies when PTO switch engaged. I have replaced PTO and seat switches as well as new battery and cleaned the positive and ground wires very well. Help please. Thank you

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Check and adjust your RIO switch{reverse implement option}near the trans if so equipped.What happens when you press forward pedal then engage blades?Would also check the lower bearing on your pto clutch to see if its seized up.

Posted on Nov 14, 2009

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If the engine dies I would link it to a safety switch, if it comes to a sudden stop you pto clutch is probably seized or mower deck,,

Posted on Jul 12, 2013

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Ford 601 work master tractor logs when PTO in engaged Drained fuel etc., when PTO is engaged is runs fine then then logs out some times to a stall?

Posted on Apr 25, 2010

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Your battery may be bad or not charging! steve

Posted on Mar 03, 2009

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I have a John Deere 355d lawn tractor. Every time I engage blade or release brakes the mower dies out. Checked safety seat switch and its not that.


Try pulling up on your PTO switch to engage the RIO switch. If it works then there is a problem with the reverse switch is located near the directional pedals/linkage or on the transmission. Attached is a picture of the switch from the John Deere parts catalog and a wiring diagram.

26092912-srivg0x12uvzbljuwpv4dthe-1-0.jpg

26092912-srivg0x12uvzbljuwpv4dthe-1-1.jpg

Feb 13, 2016 | John Deere Riding Mowers & Garden Tractors

1 Answer

John Deere Z840A Z-Trak mower. Why does engine die when PTO is engaged?


A possible cause is an open seat switch (operator presence). Locate the switch under the seat & unplug the switch from the harness. Place a small jumper wire into the female socket leads to the wire harness. If the PTO engages without engine shutting down, replace the seat switch.

Check to see if the mower deck is plugged or a piece of wood/debris is wedged between the deck and a blade, or some wire/rope is wrapped around a spindle. If the blades don't turn by hand, it'll stall your engine when the electric PTO clutch is energized.

Lastly, a discharged battery will cause an engine shut down if there's not enough reserve when the PTO is engaged. Measure the battery voltage with a meter. If the voltage is below 11.5 volts, you may have to replace the battery.

Oct 23, 2015 | John Deere Riding Mowers & Garden Tractors

1 Answer

On john deere la150, if i sit on seat and engage blades,,,nothing, but when i lift of seat, blades engage and motor shuts off. Replaced seat switch and did not fix problem


"On john deere la150, if i sit on seat and engage blades,,,nothing, but when i lift of seat, blades engage and motor shuts off. Replaced seat switch and did not fix problem" Okay, what I'm hearing is that "nothing" means the blades-driving PTO won't engage (declutch) when you switch on mower; but then, (say) as you start to dismount the mower (seat) the mower (drive clutch) engages even as the deadman switch (seat switch) kills the engine (and the drive/pto shaft starts to slow down. The key here seems to be that at full engine torque the clutch is unable to remain engaged but, rather, slips so that mower blade inertia (resistence) cannot be overcome...but as engine/pto rotation slows the clutch is able not to slip. First place to consider is the clutch gap which is probably to0 large (possibly from wear and tear, possibly not). So check specs and how-to from manual or factory and reset the pto drive clutch gap...not hard to do. If clutch gap is not the problem then most likely rehab or replacement of the clutch assy will be needed...is the mower has many years use sufficient to wear out the clutch. Another possiblity is an electic (wring/switching/grounding) problem involving mower and deadman switches.

Aug 19, 2014 | Riding Mowers & Garden Tractors

1 Answer

PTO Issues


replace the pto solenoid as it has an internal short causing the fuses to blow.

Jun 02, 2013 | John Deere Riding Mowers & Garden Tractors

1 Answer

I have john deere lx188 rideon mower when i engage the pto the engine cuts out.


This sounds like a seat micro switch problem, make sure the block connecter is fully home and the switch depresses when you sit in the seat, if all else fails replace the switch

Dec 09, 2012 | John Deere Starter Tractor Lx188 Kawasaki...

1 Answer

John Deere 160 Mower Deck Switch - mower deck does not engage when switch is turned on. The "dead man" engine shutoff still functions when the switch is engaged - if the switch is on and there is...


Hi, check that you have 12 volts to the pto when the switch is on. It sounds like your pto is fried as the switch is functioning correctly. Regards Phil.

Sep 20, 2011 | John Deere Riding Mowers & Garden Tractors

1 Answer

Mower dies when pto is engaged blades move freely


Could be the seat switch. Your operator present switch only comes into play when the clutch is engaged. If the drive clutch is engaged, and the pto is engaged, the operator present switch has to be moade.

Aug 03, 2010 | John Deere Riding Mowers & Garden Tractors

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