John Deere 516122.05 – SCO (Front Chassis Module): SCV 10 Valve Low Amp Draw / Front Hitch Single Acting Valve Circuit Fault

The controller has detected that the electrical current (amperage) flowing through the circuit for Selective Control Valve (SCV) 10—which operates the front hitch single-acting function—is lower than the expected threshold. A "low amp draw" typically indicates an open circuit, a disconnected plug, a broken wire, corroded terminals, or a failed (open) solenoid coil on the valve itself.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8245R
• 8270R
• 8295R
• 8320R
• 8345R
• 8370R
• 8400R

1. 1

   Locate the SCV 10 / Front Hitch Single Acting Valve on the front chassis valve block. Inspect the wiring harness and the electrical connector for physical damage, pulled wires, or severe corrosion.

2. 2

   Ensure the connector is fully seated and locked onto the solenoid.

3. 3

   Disconnect the harness from the SCV 10 solenoid. Use a multimeter to measure the resistance (Ohms) across the solenoid coil pins. An infinite reading (OL) indicates an internally broken/open coil.

4. 4

   If the coil tests good, check the continuity of the wiring harness from the valve connector back to the SCO (Front Chassis Module) to rule out a broken wire.

1. 1

   Turn off the tractor, remove the key, and disconnect the battery to prevent electrical shorts.

   Turn off the tractor, remove the key, and disconnect the battery to prevent electrical shorts.

2. 2

   Locate the SCV 10 / Front Hitch Single Acting Valve assembly on the front chassis.

   Locate the SCV 10 / Front Hitch Single Acting Valve assembly on the front chassis.

3. 3

   Unplug the electrical connector from the faulty solenoid.

   Unplug the electrical connector from the faulty solenoid.

4. 4

   Remove the retaining nut or clip holding the solenoid coil to the valve cartridge stem.

   Remove the retaining nut or clip holding the solenoid coil to the valve cartridge stem.

5. 5

   Slide the old solenoid coil off the valve stem.

   Slide the old solenoid coil off the valve stem. (Note: You usually do not need to open the hydraulic system to replace just the electrical coil).

6. 6

   Slide the new OEM solenoid coil onto the stem and secure it with the retaining nut/clip.

   Slide the new OEM solenoid coil onto the stem and secure it with the retaining nut/clip.

7. 7

   Apply a small amount of dielectric grease to the electrical connector and plug it back into the new coil.

   Apply a small amount of dielectric grease to the electrical connector and plug it back into the new coil.

8. 8

   Reconnect the battery.

   Reconnect the battery.

9. 9

   Turn on the tractor, clear the stored 516122.05 fault code via the command center/monitor, and actuate the front hitch to verify the repair.

   Turn on the tractor, clear the stored 516122.05 fault code via the command center/monitor, and actuate the front hitch to verify the repair.