Fendt 06.1.13 – Rear PTO subsystem: B020 - Sensor, rear PTO speed (stub shaft)

Overspeed warning. The sensor is reading a rotational speed at the rear PTO stub shaft that exceeds the expected or safe operational limits, which could be due to a genuine overspeed event, a faulty sensor sending erratic signals, or a wiring issue.

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• Vario Series 200
• Vario Series 300
• Vario Series 400
• Vario Series 500
• Vario Series 700
• Vario Series 800
• Vario Series 900
• Vario Series 1000
• Farmer 307
• Farmer 308
• Farmer 309
• Farmer 409
• Farmer 411
• Farmer 412
• Favorit 512C
• Favorit 716
• Favorit 824
• Favorit 926
• Xylon 520
• Xylon 522
• Xylon 524

1. 1

   Verify the 12V supply to the B020 sensor by checking Fuse 35 on module A013

2. 2

   Inspect the wiring harness and connector for the B020 sensor for chafing, corrosion, or shorts (reference Circuit diagram Sheet 10)

3. 3

   Perform an emergency bypass test by pressing and holding the emergency PTO button in the cab for 5 seconds to determine if the issue is purely a signal fault

4. 4

   Clear stored fault codes individually from the memory to see if the code actively returns upon startup

1. 1

   Locate the Sensor

   Locate the B020 inductive speed sensor at the rear of the tractor, positioned to read the rotational speed of the rear PTO stub shaft.

2. 2

   Disconnect

   Unplug the electrical connector from the sensor. Inspect the pins for moisture or dirt ingress.

3. 3

   Remove

   Unbolt the retaining hardware holding the sensor in place and pull the sensor straight out of its housing.

4. 4

   Install

   Insert the new 40mm inductive speed sensor into the port. Secure it with the retaining bolt.

5. 5

   Reconnect

   Plug the electrical harness back into the sensor, ensuring it clicks and locks into place.

6. 6

   Clear and Test

   Turn the tractor's ignition on. Access the terminal to clear the stored 06.1.13 fault code. Run the tractor and engage the rear PTO to verify that the overspeed warning does not return and that the RPMs read accurately on the dash.