Massey Ferguson R32 – HITCH: Issue With Signal From Rear Hitch Right Draft Pin

The voltage signal coming from the right-hand draft pin sensor is outside of its normal, expected operating range. This prevents the system from accurately sensing the draft load on the right side of the rear linkage.

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 5400 Series
• 6400 Series

1. 1

   Check for mechanical binding: Ensure there is no significant side-loading present on the hitch arms, which can cause a significant voltage difference between the two sensors.

2. 2

   Inspect the wiring harness: Visually and physically test the wire harness and connectors leading to the right draft pin sensor for damaged wires, corrosion, open circuits, or shorts to ground/power.

3. 3

   Measure sensor voltage: With the hitch completely unloaded, back-probe the sensor. A healthy draft sensor should measure approximately 2.5 Volts.

4. 4

   Compare left and right sensor voltages: They should be within 1 Volt of each other at baseline. If the right sensor's voltage is drastically different or erratic while the left is steady at ~2.5V, the right sensor has failed.

1. 1

   Relieve Load

   Lower the rear hitch completely to the ground and disconnect any implements to ensure there is zero load or tension on the draft pins.

2. 2

   Disconnect Electricals

   Turn off the tractor and disconnect the electrical harness connector from the right-hand draft pin sensor.

3. 3

   Remove the Pin

   Unbolt the retaining hardware/plate securing the right draft pin to the linkage bracket and slide the faulty draft pin sensor out of the housing.

4. 4

   Install the New Sensor

   Clean the bore, insert the new OEM draft pin sensor, and secure it with the retaining hardware.

5. 5

   Reconnect

   Plug the electrical harness back into the new sensor.

6. 6

   Calibrate the Hitch

   Because the linkage controller relies on precise baseline voltages, you must perform a rear hitch/draft sensor calibration procedure via the tractor's diagnostic interface or in-cab calibration sequence so the HITCH controller can learn the new sensor's zero-load voltage.