John Deere 516704.03 – Rear Chassis Module (SCC): SCV 5 Valve High Temperature

This code indicates that the hydraulic oil temperature within Selective Control Valve (SCV) #5 has risen beyond normal operating limits. In closed-center, load-sensing hydraulic systems, this overheating is typically caused by excessive energy loss where mechanical energy is converted into heat rather than useful work. Common root causes include internal leakage within the SCV (oil bypassing instead of generating pressure), continuous relief valve operation, or a load-sensing (LS) control failure causing excess oil to circulate without a load.

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

1. 1

   Verify Sensor Accuracy: Use the tractor's diagnostic display (CommandCenter) to monitor the live temperature reading of SCV 5. If the temperature reads extremely high immediately upon a cold startup, the temperature sensor or its wiring harness is likely shorted or faulty.

2. 2

   Check Hydraulic Fluid: Verify the hydraulic/transmission oil level and condition. Low fluid levels or degraded oil can cause poor heat dissipation.

3. 3

   Inspect for Internal Leakage: Check if the SCV 5 valve is internally leaking. If oil is bypassing the valve cartridge instead of holding pressure, it will generate significant heat.

4. 4

   Test Load-Sensing (LS) and Relief Valves: Ensure the implement connected to SCV 5 is not deadheading or causing the relief valve to operate continuously, which dumps high-pressure oil back to the tank as heat.

1. 1

   Relieve hydraulic pressure.

   Park the tractor on a level surface, lower all implements, turn off the engine, and cycle the SCV controls to relieve all hydraulic system pressure.

2. 2

   Locate SCV 5.

   Locate the SCV 5 valve block assembly at the rear of the tractor chassis.

3. 3

   Replace temperature sensor (if diagnosing a faulty sensor).

   If diagnosing a faulty sensor: Disconnect the electrical harness from the SCV 5 temperature sensor. Inspect the pins for corrosion or damage. Remove the sensor, install a replacement, and torque to OEM specifications.

4. 4

   Disconnect SCV 5 (if diagnosing a mechanical bypass/overheating issue).

   If diagnosing a mechanical bypass/overheating issue: Disconnect the hydraulic lines and electrical connectors from the SCV 5 slice.

5. 5

   Remove SCV 5 cartridge.

   Remove the SCV 5 valve cartridge/assembly from the rear manifold.

6. 6

   Inspect internal components.

   Inspect the internal O-rings, backup rings, and valve spools for scoring or wear that would allow high-pressure fluid to bypass.

7. 7

   Rebuild or replace SCV.

   Rebuild the SCV using an OEM seal kit, or replace the entire SCV 5 valve section if the internal housing is scored.

8. 8

   Reinstall and refill fluid.

   Reinstall the valve, reconnect all lines and harnesses, and top off the hydraulic fluid.

9. 9

   Test operation.

   Start the tractor, clear the SCC fault codes, and operate an implement on SCV 5 under load to verify the temperature remains within normal operating limits.