JD 3720 power and speed reduction

[Cocre]

From the online operator's manual - follow the instructions, you are doing it wrong somehow. Calibrating the throttle sensor is easy. Buy the technical manual, it is a wonderful read.

OMLVU19809_L8


Using LoadMatch (eHydro)

LoadMatch enables the operator to prevent the engine stalling during heavy load applications such as operating with a loader. This feature is turned on and off using the display mode switch

1. Turn key switch to ON position.

2. No error codes should be displayed. If any errors are displayed, activate the display mode switch (A) to acknowledge the error.

3. Press and hold the display mode switch (A) until the display reads “rELEAS”.

4. The last edited command will display, either Coast or Load.

5. If Load is not displayed, use left or right turn signals to select the Load command.

6. Activate the display mode switch (A) to edit the LoadMatch setting.

7. The LCD (B) will display the last setting for LoadMatch, either On or Off.

8. Activate the left or right turn signals (C) to turn LoadMatch On or Off.

9. When the desired setting is displayed, activate the display mode switch (A) to store the setting.

10. The LCD (B) will flash the entered command twice and then change to the normal mode.

 

[abundyg]

I just had my 3720 into my dealer and it came down to a calibration process for the rear end of the tractor and this is supposed to be done with every tractor upon initial setup and it sounds like a lot of dealers weren't aware of this andthat is why there is a lot of tractors that will only do about 16.5 to 17 mph with the big r4 tires on them and they should do 18.2.

Have a JD3720, 1 yr, 120hrs, e-hydro trans. Suddenly one day (pushing brush in a pile) it would only move at about 10% speed that it should. Had to jack the throttle way up to nurse it back to the barn. Called the dealer and let it sit for 2 days until they could take it. When they loaded it out, it moved at about 80% speed that it should. They added a little hydraulic fluid and said that it operated within the specs.

Still operates at only 80%. I tested and it makes only 17.2mph (on the largest R4 tires) on hard packed dry flat dirt road with the throttle maxed (2700rpm). Owners manual says it should make 18.4mph. I guess that is only a couple percent speed difference and probably qualifies for the dealer to say it meets specs. BUT, it is not right, I still have to throttle up way too high to get anything done.

Anyone had this? Is there something anyone knows that may help me help the dealer in looking in the right place?

I asked them to check hyd. filter, and they basically said that if it meets specs, there is no reason to look there. I hesitate to replace myself as it is several hundred dollars on this machine for both filters and new fluid, plus it is still under warranty.

Freemans