New Holland NH 5024 – CCU (Chassis Control Unit) / EHR (Electronic Hitch/PTO controller) / TMF (Transmission Management Function): Rear PTO not calibrated.

This code is triggered when the electronic control system detects that the calibration values for the Rear Power Take-Off (PTO) clutch engagement (such as the clutch quick-fill value and solenoid calibration values) are missing, corrupted, or have been wiped from the module's memory.

• 5000 - 10000 Series
• TM Series
• TM115
• TM125
• TM135
• TM140
• TM150
• TM155
• TM165
• TM175
• TM190
• T7 Series
• T70 Series
• T6 Series
• T6080
• MXM Series

1. 1

   Check for related PTO switch faults (cab and fender switches) and ensure no active codes like 5033, 5034, or 5035 are present.

2. 2

   Check the PTO Speed Sensor to ensure it is reading correctly and not throwing code 5027.

3. 3

   Check the PTO Solenoid to verify it is not stuck or shorting out (look for codes 5007 or 5008).

4. 4

   Ensure the tractor's transmission/hydraulic oil is up to normal operating temperature, as cold oil will cause calibration to fail.

1. 1

   Warm Up the Tractor

   Start the tractor and run it until the transmission/hydraulic fluid reaches the specified operating temperature (usually indicated on the dash during calibration mode).

2. 2

   Attach an Implement (Optional but Recommended)

   Attach an implement that has some rotational inertia (like a mower or rake) to help the controller learn the clutch engagement curve more smoothly.

3. 3

   Enter Diagnostic Mode

   Enter the diagnostic "H" menu mode. (On many TM/T-series models, this is done by installing a diagnostic jumper/tool or holding a specific combination of transmission buttons while turning the key switch to the ON position).

4. 4

   Navigate to the PTO Routine

   Scroll through the "H" routines until you reach the Power Take-Off (PTO) (P -- --) 'H' Routine.

5. 5

   Run the Calibration

   Follow the on-screen prompts to initiate the calibration. The controller will automatically pulse the PTO solenoid to determine the "clutch quick fill value" and the "solenoid calibration value."

6. 6

   Save and Exit

   Once the display indicates the calibration is successful, turn the key switch OFF to store the new calibration figures in the CCU memory.

7. 7

   Test Operation

   Restart the tractor and engage the PTO via the cab switch to verify smooth engagement and ensure the 5024 code has cleared.