New Holland FCD – Transmission Controller: Clutch D Not Calibrated

This fault code indicates that the transmission's "Clutch D" has not been successfully calibrated. As a result, the Electronic Management Unit disables or limits the use of this clutch, leading to poor clutch performance or a failure to shift into the gears associated with Clutch D.

• TM115
• TM120
• TM125
• TM130
• TM135
• TM140
• TM150
• TM155
• TM165
• TM175
• TM190
• T7.220
• T7.235
• T7.250
• T7.260
• T7.270
• T7030
• T7040
• T7050
• T7060
• 8160
• 8260
• 8360
• 8560
• M100
• M115
• M135
• M160
• MXM Series (MXM120 to MXM190)
• Maxxum Series

1. 1

   Attempt Dynamic Calibration: Run the transmission calibration procedure. If the code clears and the tractor operates normally, no further repair is needed.

2. 2

   Check for 'U' Calibration Errors: During calibration, monitor the dash for specific 'U' codes that halt the process. Common preconditions that fail include: U19: Oil temperature below 20°C (must be warmed up), U21 / U22: Engine RPM too low / too high, U23: Shuttle lever is in neutral, U26: Clutch pedal is not released, U31: Output speed sensed (tractor is moving), U36: Maximum allowed clutch calibration value exceeded.

3. 3

   Inspect the PWM Valve: If calibration fails without a specific 'U' code, the issue is likely a faulty solenoid, a faulty hydraulic circuit, or a mechanical fault. Remove the PWM (Pulse Width Modulation) valve for Clutch D, clean it, and reinstall it to see if calibration can be performed successfully.

4. 4

   Pressure Test: If calibration still fails, perform a pressure test on Clutch D. The pressure should be approximately 16 bar.

1. 1

   Clean/Replace Solenoid

   If the pressure test fails or calibration is still blocked after cleaning the PWM valve, replace the Clutch D PWM solenoid valve with a new unit.

2. 2

   Re-test Pressure

   After replacing the solenoid, check the pressure again. If it reaches 16 bar, attempt calibration.

3. 3

   Internal Hydraulic/Mechanical Repair

   If the pressure is still low (below 16 bar), the transmission has internal leakage. You will need to split the tractor and access the clutch packs.

4. 4

   Inspect Seals and Discs

   Check for clutch piston seal leakage or leakage to the piston from the PWM valve manifold. Inspect the Clutch D friction plates and steel plates for mechanical wear or burning. Replace the piston seals and clutch pack as necessary.

5. 5

   Reassembly

   When reassembling the transmission front cover and manifolds, apply a couple of drops of New Holland Thread Seal (OEM 82995768) to the specified retaining screws.

6. 6

   Final Calibration

   Refill the transmission fluid, warm the tractor up (above 20°C), and perform the final transmission calibration to clear the FCD code.