Massey Ferguson B.01.19 – Mid Mount Valve Module: Issue With Spool Position Sensor Value

The control module is receiving an erratic, out-of-range, or missing electrical signal from the sensor responsible for monitoring the physical position of the hydraulic spool within the valve block.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4700 Series
• 4707
• 4708
• 4709
• 4710
• 5600 Series
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5700 Series
• 7600 Series
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7700 Series
• 7714 to 7726S

1. 1

   Check for accompanying codes like 0B.01.16 or 0B.01.22, which indicate broader CAN-bus communication failures or lost calibration rather than a failed sensor.

2. 2

   Inspect the wiring harness and connector at the mid-mount valve spool position sensor for physical damage, moisture ingress, and corrosion.

3. 3

   Verify that the sensor is receiving its standard reference voltage (typically 5V) and has a solid ground.

4. 4

   Back-probe the signal wire with a multimeter while manually actuating the spool or commanding it via the joystick to look for smooth voltage transitions without dropouts.

1. 1

   Preparation

   Park the tractor on a level surface, lower any attached implements (loader/front hitch) to the ground to relieve hydraulic pressure, and turn off the engine.

2. 2

   Disconnect Power

   Disconnect the negative battery terminal to prevent short circuits during the repair.

3. 3

   Locate the Valve

   Locate the mid-mount electro-hydraulic valve block.

4. 4

   Clean the Area

   Thoroughly clean the area around the spool position sensor to prevent dirt from entering the sensitive hydraulic valve slice when the sensor is removed.

5. 5

   Remove the Sensor

   Disconnect the electrical pigtail/harness from the sensor. Unbolt or unscrew the faulty spool position sensor from the end of the valve slice.

6. 6

   Install the New Part

   Install the replacement sensor, ensuring any O-rings or seals are properly seated and lubricated with clean hydraulic oil. Torque to the manufacturer's specification.

7. 7

   Reassembly

   Reconnect the electrical harness and the battery.

8. 8

   Calibration

   Clear the DTCs using a compatible diagnostic tool and perform a Valve Calibration procedure via the tractor's Datatronic/Fieldstar terminal or dealer diagnostic software so the module can learn the new sensor's neutral, fully open, and fully closed voltage values.