Case IH 114 – Armrest Controller: Aux 3rd remote valve FLOW potentiometer is failed in the Armrest Controller

The system detects an open circuit, short circuit, or out-of-range voltage signal from the dial/potentiometer used to control the hydraulic flow rate for the 3rd auxiliary remote valve.

• Magnum
• Case IH MX Magnum Series (e.g., MX180, MX200, MX210, MX230, MX245, MX255, MX285)
• Case IH Magnum Series (e.g., 225, 250, 305, 310, 340)
• Case IH Steiger / STX Series (e.g., STX275, STX325, 335, 450)
• Case IH TG Series

1. 1

   Verify Armrest Controller Connections: Ensure the main harness connector to the armrest controller (e.g., connector C137) is correctly installed, fully seated, and free of bent pins or corrosion.

2. 2

   Inspect Wiring: Check the data bus wires, power wires, and ground wires leading to the armrest controller.

3. 3

   Test the Signal Circuit: Check for a short to ground, open circuit, or high resistance connection on the specific signal wire for the 3rd remote flow potentiometer.

4. 4

   Test the Potentiometer: Use a multimeter to measure the resistance of the potentiometer as you turn the dial. Look for 'dead spots' or erratic resistance readings (a common failure is a bad spot around a specific percentage, like 25%).

1. 1

   Disconnect Power

   Turn off the tractor and disconnect the battery to prevent electrical shorts while working on the armrest controller.

2. 2

   Disassemble the Armrest

   Remove the retaining screws on the armrest console to access the internal circuit boards and switch pods.

3. 3

   Locate the 3rd Remote Flow Potentiometer

   Identify the specific potentiometer linked to the 3rd SCV flow dial.

4. 4

   Replace the Component

   If the potentiometer is serviced separately: Unplug or desolder the failed potentiometer, remove its retaining nut (usually a 3/8-32 nut), and install the new potentiometer. If the potentiometer is integrated: On many modern Case IH boards, if the potentiometer cannot be individually replaced, the entire remote valve switch board/module must be replaced.

5. 5

   Reassemble

   Secure the potentiometer, reattach the armrest covers, and reconnect the battery.

6. 6

   Calibrate

   After replacing an armrest SCV component, you must perform a calibration of the armrest remote valves using the tractor's display monitor so the controller can learn the new minimum and maximum potentiometer values.