Case IH 113 – Armrest Controller: Aux 2nd remote valve FLOW potentiometer is failed in the Armrest Controller

The rotary potentiometer responsible for setting the hydraulic flow rate of the #2 auxiliary remote valve is sending an out-of-range voltage, an open circuit, or a short circuit signal to the controller.

• Magnum
• MX Magnum
• Magnum 215
• Magnum 225
• Magnum 235-340
• Magnum 290
• Magnum 310
• Steiger 335
• Steiger 380
• Steiger 435
• Steiger 450
• Steiger 535
• Steiger 550
• Puma
• Optum
• Maxxum

1. 1

   Open the armrest console and visually inspect the wiring harness leading to the #2 remote valve flow potentiometer for chafed wires, loose connector pins, or debris.

2. 2

   Perform a potentiometer sweep test using a multimeter or the tractor's diagnostic display screen to monitor the output voltage/percentage while slowly turning the dial, looking for a 'dead spot' in the carbon track.

3. 3

   Perform a component swap test by swapping the electrical connector from the #2 flow potentiometer with an adjacent one (such as #1 or #3) to determine if the fault follows the potentiometer or remains with the wiring harness/armrest controller board.

1. 1

   Preparation

   Power off the tractor and disconnect the battery to prevent electrical shorts.

2. 2

   Disassembly

   Remove the retaining screws to lift the upper housing/console cover of the armrest. This will expose the internal remote valve control pods and circuit boards.

3. 3

   Removal

   Locate the flow control potentiometer for the 2nd auxiliary remote valve. Disconnect its electrical wiring harness connector.

4. 4

   Dismounting

   Remove the retaining nut (typically a 3/8-32 nut) or mounting screws holding the potentiometer to the armrest plastic housing.

5. 5

   Installation

   Insert the new potentiometer into the housing, secure it with the retaining nut, and plug in the electrical harness.

6. 6

   Reassembly

   Carefully reinstall the armrest console cover, ensuring no wires are pinched, and tighten the screws. Reconnect the battery.

7. 7

   Calibration

   Power on the tractor. You must perform an Armrest Controller / SCV (Selective Control Valve) calibration using the tractor's display monitor or a Case IH diagnostic tool. This allows the armrest controller to learn the new potentiometer's minimum and maximum voltage limits.