John Deere 523813.05 – RPT / BCU: Rear PTO Speed 1 Solenoid Low Amp Draw

The control software measures a current of less than 500 mA at the output to the PTO Speed 1 solenoid (Y73) while commanded ON, indicating an open circuit or failed internal coil.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6230
• 6330
• 6430
• 6830
• 7130
• 7230
• 7430
• 7530

1. 1

   Visually inspect the wiring harness and connectors leading to the Y73 PTO Speed 1 solenoid (specifically lead 7063) for chafing, breaks, or loose pins.

2. 2

   Disconnect the solenoid and use a multimeter to verify that the connector is receiving a 12V supply from the RPT or BCU when the PTO is switched on.

3. 3

   Measure the resistance across the pins of the PTO Speed 1 solenoid (Y73). A healthy coil should show around 5 Ohms; an out of limits (OL) reading means the internal coil is open and dead.

4. 4

   Use diagnostic tools or a multimeter in series to measure the current levels at the solenoid, ensuring it draws more than 500 mA.

1. 1

   Power Down

   Turn off the tractor, remove the key, and relieve any residual hydraulic pressure.

2. 2

   Repair Wiring

   If the diagnostic checks revealed a broken wire or corroded connector in the harness leading to the rear chassis, splice and seal the damaged wire or replace the connector pigtail.

3. 3

   Locate PTO Valve Block

   If the wiring is intact but the Y73 solenoid failed the resistance test, locate the PTO valve block on the rear chassis.

4. 4

   Clean Area

   Clean the area around the valve block to prevent dirt from entering the hydraulic system.

5. 5

   Remove Faulty Solenoid

   Unbolt and remove the faulty PTO Speed 1 solenoid valve assembly.

6. 6

   Install New Solenoid

   Install the new solenoid valve, ensuring the O-rings/seals are properly seated to prevent hydraulic leaks.

7. 7

   Reconnect Harness

   Reconnect the electrical harness.

8. 8

   Software Update

   Ensure the PAP control software is updated to the latest version, as some patches address current regulation sensitivities.

9. 9

   Clear Codes and Test

   Clear the fault codes via the CommandCenter or diagnostic tool and test PTO engagement.