John in the UP
Bronze Member
- Joined
- Jun 10, 2008
- Messages
- 51
- Location
- Michigan's Upper Peninsula
- Tractor
- 2021 John Deere 4066R Snow Cab
Looking for ideas on where to start looking. Tractor is a JD 3720 e-hydro, about 350 hours. Here's what happened:
Was blowing snow with JD 59" snow blower.
Tractor was running 2500/2600 rpm range.
Tractor and blower running normal, moving forward about 1.3 mph according to the digital display.
I felt what I perceived as a slight bump, and tractor stopped - I did NOT take my foot off the go pedal.
Checked the digital display, no error codes showing, but although machine was stopped, display was still displaying speed ~0.3 mph.
Engine rpm did not change (25/2600 rpm), but tachometer was now reading 500/600 rpm.
The machine would not move Forward or Reverse (yes I activated RIO before stepping on Reverse pedal), so I idled it down and turned off the PTO.
After a moment, the tach reacted, and started reading about 1000 rpm.
Stepped on the Forward pedal and moved. Then stepped on the Reverse pedal and moved backwards.
Turned on the PTO and resumed snow blowing operations, and a short time later it did the same thing again.
In the 2-1/2 hours I was clearing snow, it did this probably 8 times total.
My initial guess is a sensor problem. I do most of the normal maintenance, but I have limited experience with repairing this kind of drive problem.
Thanks...
Was blowing snow with JD 59" snow blower.
Tractor was running 2500/2600 rpm range.
Tractor and blower running normal, moving forward about 1.3 mph according to the digital display.
I felt what I perceived as a slight bump, and tractor stopped - I did NOT take my foot off the go pedal.
Checked the digital display, no error codes showing, but although machine was stopped, display was still displaying speed ~0.3 mph.
Engine rpm did not change (25/2600 rpm), but tachometer was now reading 500/600 rpm.
The machine would not move Forward or Reverse (yes I activated RIO before stepping on Reverse pedal), so I idled it down and turned off the PTO.
After a moment, the tach reacted, and started reading about 1000 rpm.
Stepped on the Forward pedal and moved. Then stepped on the Reverse pedal and moved backwards.
Turned on the PTO and resumed snow blowing operations, and a short time later it did the same thing again.
In the 2-1/2 hours I was clearing snow, it did this probably 8 times total.
My initial guess is a sensor problem. I do most of the normal maintenance, but I have limited experience with repairing this kind of drive problem.
Thanks...