John Deere SCO523937.06 – SCO: SCV V Retract Solenoid Circuit Current High

The Secondary Hydraulic Control Unit (SCO) has detected an abnormally high electrical current in the circuit for the solenoid that controls the retraction of the fifth selective control valve (SCV V). This high current condition is typically caused by a short circuit in the wiring harness or a faulty solenoid coil.

• 9230
• 9330
• 9430
• 9530
• 9630
• 9230 Scraper
• 9330 Scraper
• 9430 Scraper
• 9530 Scraper
• 9630 Scraper
• 7720
• 7820
• 7920
• 7630
• 7730
• 7830
• 7930

1. 1

   Restart the tractor to see if cycling the power clears a temporary communication glitch

2. 2

   Visually inspect the area around the batteries and alternator for any signs of damage or debris accumulation

3. 3

   Check fuse F29 (associated with SCO supply voltage, SCV V, and front hitch valve solenoids), as well as fuses F12, F24, and F51 for the SCV control unit

4. 4

   Inspect for hydraulic contamination and clean the area around the solenoid before removal to prevent dirt from entering the system

5. 5

   After removing the solenoid, inspect the pilot valve for any metal filings or debris that could be causing it to stick, ensuring the pin moves freely

6. 6

   Perform a resistance test on the solenoid's two terminals using a multimeter to check for an out-of-spec reading indicating a faulty coil

7. 7

   Swap the suspect solenoid with a known good one from another SCV to determine if the problem follows the solenoid or stays with the valve

1. 1

   Relieve hydraulic pressure

   Shut down the tractor and relieve any pressure in the hydraulic system before beginning work.

2. 2

   Clean the area

   Thoroughly clean the area around the SCV solenoid to prevent dirt from entering and contaminating the hydraulic system.

3. 3

   Remove the solenoid

   Disconnect the electrical connector from the solenoid. Remove the screws holding the solenoid to the valve body and carefully pull it off.

4. 4

   Inspect and clean the pilot valve

   Inspect the pilot valve for any metal filings or debris that could cause it to stick. Ensure the pin in the valve moves freely. Clean with a suitable parts cleaner if necessary.

5. 5

   Install the new solenoid

   Place the new solenoid onto the valve body and secure it with the mounting screws. Reconnect the electrical connector.

6. 6

   Flush the system

   Run the engine for a few minutes to flush the hydraulic system after installing the new solenoid.

7. 7

   Recalibrate the SCV

   Recalibrate the SCV. Note that this procedure may require specialized tools and software available to John Deere technicians.