John Deere 523806.11 – Rear PTO Control Unit (RPT): Rear PTO Speed 3 Solenoid Issue

This indicates an electrical or operational fault (such as a short, open circuit, or overload) detected in the solenoid valve responsible for engaging or modulating the Rear Power Take-Off (PTO). When this solenoid fails, the tractor loses the electronic control required to translate cab switch commands into the hydraulic action that engages the PTO.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R

1. 1

   Listen for Actuation: Turn the key on and engage the PTO switch. Listen for an audible 'click' from the solenoid on the rear of the transmission housing. A lack of clicking indicates an electrical failure.

2. 2

   Test the PTO Switch: Use a multimeter to test the resistance (ohms) of the yellow PTO pull-knob/switch in the cab to ensure it is actually sending a signal to the RPT module.

3. 3

   Check Power and Ground: Disconnect the solenoid harness and check for proper power and ground at the connector when the PTO is activated.

4. 4

   Inspect the Circuit & Relays: Check the ELX relay and the PTO electrical circuit for blown fuses or shorts, which can mimic a dead solenoid.

5. 5

   Ohm Test the Solenoid: Measure the resistance across the pins of the PTO solenoid itself to see if the internal electromagnetic coil is shorted or open.

6. 6

   Clean Connections: Thoroughly clean the electrical connections. Partial or dirty connector engagement causes intermittent hydraulic problems that trigger this code.

1. 1

   Locate the Solenoid

   The rear PTO solenoid valve is located on the rear of the transmission housing. Allow extra time for access, as it can be in tight quarters. (Note: Depending on your specific tire setup and clearance, jacking the tractor and removing a rear wheel or draft arm may be required for better access).

2. 2

   Disconnect Wiring

   Remove any brackets holding the electrical wires in place, then unplug the wire harness from the PTO valve.

3. 3

   Clean the Area

   Crucial step: Thoroughly clean the area around the solenoid free of dirt and debris. You do not want any contaminants falling into the hydraulic port when the valve is removed.

4. 4

   Remove the Valve

   Extract the retaining bolts (typically hex head bolts) securing the PTO valve to the housing. Pull the faulty solenoid valve out.

5. 5

   Install the New Valve

   Insert the replacement PTO solenoid valve and torque the retaining bolts to spec.

6. 6

   Reconnect

   Reconnect the electrical wire harness, ensuring the connector clicks and is fully seated.

7. 7

   Test

   Perform a test run of the PTO to ensure smooth hydraulic engagement and verify that the RPT fault code has cleared.