JD 3720 won't get to normal speeds.

[Nopper]

Hi everyone.
My wife was running a box blade in our field the other day. She stopped the tractor to answer her phone, and when she went to go back to work, the tractor would only go about 1/2 the normal speed for the RPM's she was running at. She immediately parked the tractor. I checked it out when I got home, and sure enough it is super slow. Any one have a idea about what would cause this?
Thanks

 

[John_in_TN]

Hydro with cruise control?
If so: she might have accidently flipped the Cruise Control switch into the "Max Speed" psition.

 

[zzvyb6]

Release the brake.

 

[Nopper]

It is a hydro with cruise. how do I disable the Max Speed?
Thanks

 

[John_in_TN]

The switch that turns the cruise on & off has three positions: Cruise/Off/MaxSpeed.
Just flip the switch to Cruise or Off.

 

[Cocre]

Turn off LoadMatch. Your throttle position sensor is either bad or needs recalibrating. Mine did this a year ago. I recalibrated the sensor and mostly fixed the issue, but I still leave LoadMatch off most of the time.

 

[9973720wb19]

Your wife runs a box blade!?...impressive! I can hardly get my wife to look at my beautiful 3720!

 

[Nopper]

I will try turning off the load match. My wife loves the 3720.
Thanks for all of the help.