John Deere 3720

Japanese manufacturer safety recall affecting the lighting. Declared production window: 2021–2022.

On certain side-by-side UTVs, the owner's manual is missing information for how a person can contact Transport Canada to report a safety concern. Canadian regulations require all companies to provide this information in the owner's manual.

On certain side-by-side UTVs, the owner's manual is missing information for how a person can contact Transport Canada to report a safety concern. Canadian regulations require all companies to provide this information in the owner's manual.

On certain side-by-side UTVs, the owner's manual is missing information for how a person can contact Transport Canada to report a safety concern. Canadian regulations require all companies to provide this information in the owner's manual.

Japanese manufacturer safety recall affecting the electronic control. Declared production window: 2020–2024.

Engine repeatedly codes high temperature during operation at 2000-2500 RPM despite recent water pump, thermostat, coolant, and belt replacement. Issue recurs after appearing resolved. Temperature drops at low RPM. Belt slippage suspected as cause of inadequate coolant circulation and boil-off.

Tractor experiences high coolant temperatures that cool back to normal before reaching redline. User suspects failing thermostat after coolant change. Temperature fluctuates rather than remaining stable.

https://preview.redd.it/z3vtfyzrouog1.jpg?width=1920&format=pjpg&auto=webp&s=6e0254aa9d333da118a0c9d4433451693fe88e03 Photo for reference. Got a JD3720 (hydrostatic) and at the end of last year and now this year I am noticing a loss of sensitivity in the accelerator pedal. Usually in any gear (A/B/C) you can lightly put your foot down and get some gentle forward motion out of the tractor. Finding that now you have to bring the tractor to \~1700 (n/min x 100) to get any sort of movement. Inline hydraulic filter LVA12726 replaced May 2022. Maybe that needs a clean? Hydraulic fluid is full and clean. Cab air filter and engine air filters (primary, secondary) clean. Fuel filter, engine oil filter and engine oil changes done April 2025. Any troubleshooting tips very welcome.

JD 3720, high temp problem, but cools back to normal before going into the redline. I changed the coolant already, do you think it's a failing thermostat?

I have a JD 3720 at work. The AC is broken and needs repaired. Even at 24°C outside with the back window open fully, it can be 39°C when the sun is beating down. 've been cursing the AC system for years and avoiding repair because there's plenty else to spend money on and for the most part I do tractor work early/late in the day. Question is. Who out there has a similar closed cab tractor, who has working AC and runs tractor in the middle 30°C summer days? I'm basically just looking for some encouragement that AC systems really work even in small cabs, so that I can justify the investment 😅