John Deere HCU524212.19 – HCU: Rear Hitch Control Lever Problem

The Hitch Control Unit (HCU) has detected an issue with the signal from the rear hitch control lever. This fault indicates a problem with the lever the operator uses to control the rear three-point hitch. The ".19" suffix on the code signifies that a fault message has been received related to this component.

• 6R 110
• 6R 120
• 6R 130
• 6R 140
• 6R 145
• 6R 150
• 6R 155
• 6R 165
• 6R 175
• 6R 185
• 6R 195
• 6R 215
• 6R 230
• 6R 250
• 6110R
• 6120R
• 6130R
• 6135R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 7720
• 7820
• 7920
• 7630
• 7730
• 7830
• 7930
• 7200R
• 7215R
• 7230R
• 7260R
• 7280R
• 8130
• 8230
• 8230T
• 8330
• 8330T
• 8430
• 8430T
• 8530
• 8225R
• 8235R
• 8245R
• 8260R
• 8270R
• 8285R
• 8295R
• 8295RT
• 8310R
• 8310RT
• 8320R
• 8320RT
• 8335R
• 8335RT
• 8345R
• 8345RT
• 8360R
• 8360RT
• 9230
• 9330
• 9430
• 9430T
• 9530
• 9530T
• 9630
• 9630T
• 9360R
• 9410R
• 9460R
• 9460RT
• 9470RX
• 9510R
• 9510RT
• 9520RX
• 9560R
• 9560RT
• 9620RX
• 2204
• 2854
• 7185J
• 7195J
• 7200J
• 7205J
• 7210J
• 7215J
• 7225J
• 7230J
• 7715
• 7815

1. 1

   Shut down the tractor, wait a few moments, and restart the engine to see if the communication error resets and clears from the CommandCenter.

2. 2

   Check relevant fuses, specifically Fuse F30, which is associated with HCU-related issues.

3. 3

   Visually inspect the wiring harness leading to the rear hitch control lever in the cab for damage, chafing, or loose connections.

4. 4

   Inspect the wiring to the hitch position sensors located on the rear of the tractor.

5. 5

   Perform a Hitch Control Lever Voltage Test via CommandCenter diagnostic address HCU 7 with the engine off: Pull lever fully rearward (0.50-2.00V expected). Push fully forward (voltage should increase by at least 2V, reading 3.00-4.50V). Readings >4.75V indicate an open ground, <0.25V indicate an open circuit, and a constant 5V points to a defective harness.

6. 6

   Perform a hitch calibration via the CommandCenter with hydraulic oil warm (above 50°C/122°F). Access the hitch calibration menu, move the rear hitch control lever through its full range of motion (fully forward and fully rearward) to calibrate raise and lower functions, and follow all on-screen prompts. If calibration fails or the code returns, it suggests a problem with the lever sensor or wiring.

1. 1

   Access control lever

   Gain access to the control lever assembly within the cab's control console or armrest.

2. 2

   Disconnect wiring

   Disconnect the electrical connector from the faulty rear hitch control lever.

3. 3

   Remove faulty lever

   Remove the mounting hardware that secures the lever and remove the assembly.

4. 4

   Install new lever

   Install the new lever assembly and secure it with the mounting hardware.

5. 5

   Reconnect wiring

   Reconnect the electrical connector to the new lever assembly.

6. 6

   Reassemble console

   Reassemble the cab's control console or armrest.

7. 7

   Calibrate hitch

   Perform a hitch calibration via the CommandCenter to ensure proper operation of the new lever.