New Holland TRANS 134 – Transmission Controller (TRANS): Master clutch is not calibrated

The transmission controller has lost or lacks the stored calibration values that dictate the exact engagement point of the master clutch. Without these values, the controller cannot smoothly modulate the clutch, which can result in harsh shifting, failure to move, or the system locking out normal operation.

• TG210
• TG230
• TG255
• TG285
• TG305
• T8010
• T8020
• T8030
• T8040

1. 1

   Check for Active Faults: Retrieve and record any other active fault codes. The system will not allow calibration if there are active faults related to the clutch potentiometer, solenoids, or the inching pedal.

2. 2

   Inching Pedal Range: Verify that the inching pedal (clutch pedal) is reading within a valid range on the display.

3. 3

   Fluid Level and Condition: Ensure the transmission hydraulic fluid is at the correct level and is not contaminated, as low pressure or poor fluid quality will cause the calibration to fail.

1. 1

   Park the tractor on a level surface, place the transmission in neutral, and apply the parking brake.

   Park the tractor on a level surface, place the transmission in neutral, and apply the parking brake.

2. 2

   Using the instrument cluster display, press the DECR key until the display reads "TRANS", then press the PROG key to enter the TRANS SETUP menu.

   Using the instrument cluster display, press the DECR key until the display reads "TRANS", then press the PROG key to enter the TRANS SETUP menu.

3. 3

   Clear any stored fault codes, as they must be cleared before calibration is possible.

   Clear any stored fault codes, as they must be cleared before calibration is possible.

4. 4

   Follow the on-screen prompts to begin the calibration (the display may prompt actions like "Pedal Dn" to press the inching pedal).

   Follow the on-screen prompts to begin the calibration (the display may prompt actions like "Pedal Dn" to press the inching pedal).

5. 5

   During the automated master clutch calibration process, the transmission controller will take over and increase the engine speed (typically to 1000 - 2000 RPM).

   During the automated master clutch calibration process, the transmission controller will take over and increase the engine speed (typically to 1000 - 2000 RPM).

6. 6

   The controller will slowly turn on the master clutch until it detects an increase in engine load. This sets the calibration point.

   The controller will slowly turn on the master clutch until it detects an increase in engine load. This sets the calibration point.

7. 7

   Once the process is complete and successful, press the PROG key to exit the transmission calibration menu. Engine speed control will be returned to the armrest hand throttle.

   Once the process is complete and successful, press the PROG key to exit the transmission calibration menu. Engine speed control will be returned to the armrest hand throttle.

8. 8

   Test drive the tractor to ensure smooth engagement. If the calibration repeatedly fails, you will need to physically inspect the master clutch solenoid, the clutch potentiometer, and the wiring harness for shorts or opens.

   Test drive the tractor to ensure smooth engagement. If the calibration repeatedly fails, you will need to physically inspect the master clutch solenoid, the clutch potentiometer, and the wiring harness for shorts or opens.