Massey Ferguson D158 – DCC3 / Autotronic 4: Armrest Arm Potentiometer

Incorrect calibration of armrest lever; the system detects that the potentiometer is sending a voltage signal that does not match the expected calibrated parameters for the lever's physical position.

• MF 8600
• MF 8650
• MF 8660
• MF 8670
• MF 8680
• MF 8690
• MF 8450
• MF 8460
• MF 8470
• MF 8480
• 8600 Series
• 8670
• 8690
• 8400 Series
• 7600 Series
• 7614 to 7618
• 5700 SL Series

1. 1

   Inspect the wiring harness and connection under the armrest for loose pins or erratic connections.

2. 2

   Verify if recent service work was performed on the potentiometer, DCC3 controller, or instrument panel, as these require a recalibration.

1. 1

   Turn on display

   Turn on the tractor's display screen / instrument panel.

2. 2

   Navigate to calibration menu

   Navigate to the calibration menu using the keypad.

3. 3

   Select calibration

   Select the icon for 'Calibrating the forward lever on the armrest' and press 'OK'.

4. 4

   Verify neutral position

   The screen will display the current position of the lever on the first line. It should indicate 'Neutral'.

5. 5

   Push lever forward

   Push the armrest lever fully forward to the '+' position.

6. 6

   Observe screen

   Observe the screen; the value on the first line should change to reflect the new position.

7. 7

   Save calibration

   Follow the on-screen prompts to save the calibration and exit the menu.

8. 8

   Replace potentiometer if calibration fails

   If the calibration fails, or if the screen values do not change when you move the lever, the potentiometer (Component X106) has failed internally and must be replaced.