Massey Ferguson 0B.X.23 – Loader Mid Mount Valve Module: Issue With Calibration OF Valves

Electro-hydraulic proportional valves have lost their calibration parameters, or the controller attempted a self-calibration/routine calibration that failed.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 6700S Series
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714 to 7726S

1. 1

   Check hydraulic fluid level and ensure it is at operating temperature (35°C - 45°C), as cold, thick oil will cause calibration to fail

2. 2

   Inspect hydraulic filters for restriction and check for dirty oil, which can cause mid-mount spool valves to stick

3. 3

   Inspect the wiring harness at the Loader Mid Mount Valve block for loose connector pins, moisture ingress, or rubbed wires on the solenoids and spool position sensors

4. 4

   Check for accompanying fault codes such as 0B.X.17 through 0B.X.21 (Issue With Spool Position Sensor Value) or 0B.X.16 (No Communication), which indicate a hard electrical fault that must be fixed before calibration

1. 1

   Preparation

   Park the tractor on flat ground, apply the parking brake, and place the transmission in neutral.

2. 2

   Warm-Up

   Start the engine and set the RPM to around 1500. Cycle the loader joystick through all functions (raise, lower, dump, curl) repeatedly for a few minutes. This ensures the mid-mount valve block and solenoids are warmed up to the transmission temperature.

3. 3

   Enter Calibration Mode

   Access the tractor's diagnostic/calibration menu via the Dash Control Center (SIS) or the Datatronic terminal. Navigate to the Loader / Mid-Mount Valve calibration section.

4. 4

   Joystick Calibration

   Follow the on-screen prompts to move the joystick to its maximum extents (full forward, full back, full left, full right) and hold it so the controller can learn the potentiometer limits.

5. 5

   Valve Calibration

   Initiate the electro-valve calibration. The ECU will automatically send varying voltages to the mid-mount solenoids to learn the exact engagement points of the spools. Do not touch the controls during this automated process.

6. 6

   Validation

   Once the screen indicates a successful calibration, turn the tractor off to save the settings to the ECU. Restart the tractor and test the loader for smooth operation.

7. 7

   Replace parts if calibration fails

   If calibration fails repeatedly, the mid-mount valve solenoids or the spool position sensors are mechanically sticking or electrically failing and will require replacement.