John Deere 523870 – SCO: Stepper Motor for E-SCV XII, Temperature Too High

The temperature of the stepper motor for Electronic Selective Control Valve 12 (E-SCV XII) has exceeded 100 °C (212 °F). The stepper motor will not resume operation until its internal temperature drops below this threshold. The control software will disable the selective control valve, resulting in no function for E-SCV XII.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6230R
• 6250R
• 6090M
• 6100M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 5090R
• 5100R
• 5115R
• 5125R
• 7R 210
• 7R 230
• 7R 250
• 7R 290

1. 1

   Allow the machine to cool down until the stepper motor temperature drops below 100°C (212°F) and test operation

2. 2

   Inspect the tractor's hydraulic oil cooling system for issues causing the hydraulic fluid to overheat

3. 3

   Monitor the temperature of the stepper motor via the diagnostic monitor to ensure it stays within the recommended range

4. 4

   Check the SCV spool valve for mechanical binding, which can cause the stepper motor to overwork and generate excessive heat

1. 1

   Cool Down & Clear

   Allow the tractor to sit until the E-SCV XII stepper motor cools below 100°C (212°F). Clear the fault codes.

2. 2

   Address Hydraulic Overheating

   If the hydraulic system is overheating, repair or replace any faulty hydraulic cooling components (e.g., restricted coolers, low fluid levels).

3. 3

   Replace the Stepper Motor

   If the hydraulic oil temperature is normal but the E-SCV XII stepper motor continues to overheat (often due to an internal electrical short or internal friction), the stepper motor must be replaced.

4. 4

   Recalibrate

   After installing a new stepper motor, use John Deere Service ADVISOR to calibrate the new E-SCV stepper motor to the SCO controller.