JD 757 only runs and moves when the PTO blades are engaged.

[rhuether]

I have a 2007 JD 757. Bought it earlier this summer with only 660 hrs. on it. Been running great, then a week ago it just stopped running cutting my yard. My son helped me trouble shoot and this is what we found. Starts up fine and continues running when i release the parking brake. AS SOON AS I engage the handles to move it, it cuts off. Either arm and it will cut off. BUT, if I engage the PTO blades, it will move. as soon as the PTO is shut off, if the handles are pulled in, it cuts off. We checked all the wires seat switch, replaced the PTO switch. same results, no change. Even tried bypassing the seat safety switch, no change. I'm stumped!

Thank you all for your support. The diode was bad, replaced it and the unit now works great! You all have been awesome with your support!

 

[hlw49]

Before you waste a trip... Do you have a multimeter? If so, an Ohm test will confirm a diode easily. One direction of connection show continuity, switch the meter leads and it should show no continuity. Diodes are a 1-way electrical door. If it tests continuity in both directions, the diode is bad.

At the dealer, I hope they have someone who knows how to use multimeter. Otherwise, they will charge you an hour of labor, then sell you new parts without you ever realizing if they really tested anything properly.

I was a JD service manager for a few years, and their goal is to sell, sell, sell.

Good to know thanks