Case IH 51095 – AUX (Auxiliary Valve Controller): Aux 5th Lower solenoid failed open or short circuit.

The tractor's control system has detected an electrical anomaly in the circuit responsible for operating the 'Lower' (or retract) function of the 5th auxiliary hydraulic remote valve. The system is seeing either an open circuit (such as a broken wire, disconnected plug, or burnt-out internal solenoid coil) or a short circuit to ground.

• MX Magnum
• MX Magnum Series
• TG Series
• Steiger / STX Series

1. 1

   Visually inspect the 5th auxiliary remote valve block wiring harness and connector for physical damage, chafing, or dirt/moisture ingress

2. 2

   Disconnect the harness from the solenoid and inspect the pins for corrosion, melting, or being pushed out of the connector housing

3. 3

   Measure the resistance across the two pins of the solenoid coil using a digital multimeter (infinite/OL indicates open, near 0 ohms indicates shorted)

4. 4

   Check the wiring harness for continuity back to the AUX controller and test for a short to the chassis ground (if coil resistance is normal)

1. 1

   Safety First

   Park the tractor on a level surface, turn off the engine, engage the parking brake, and relieve all hydraulic system pressure by cycling the remote levers/switches with the key on (engine off).

2. 2

   Disconnect Power

   Turn the battery disconnect switch to the OFF position to protect the controllers.

3. 3

   Remove the Coil

   Disconnect the electrical plug from the 5th remote lower solenoid. Remove the retaining nut at the top of the solenoid stem.

4. 4

   Replace the Coil

   Slide the faulty solenoid coil off the valve cartridge stem. (Unless the valve itself is leaking or sticking mechanically, you do not need to remove the hydraulic cartridge from the valve block). Slide the new coil onto the stem.

5. 5

   Reassembly

   Install and tighten the retaining nut (do not overtighten, as this can distort the coil housing). Reconnect the electrical harness plug securely.

6. 6

   Clear Codes and Test

   Turn the battery power back on. Turn the ignition key to the ON position, access the tractor's diagnostic menu via the instrumentation cluster or Pro/IntelliView monitor, and clear the inactive 51095 fault code. Start the tractor and actuate the 5th remote to verify the repair.