Case IH 10018 – Front Suspension controller (ATC or TRANS): Front Suspension Pump not tank Solenoid over current

The control module has detected an over-current condition (typically caused by a short circuit) on the circuit for the solenoid valve that directs hydraulic pump pressure to the front suspension cylinders.

• Magnum
• Case IH Magnum 235 - 340 (Series 4)
• Case IH Steiger

1. 1

   Inspect the wiring harness between the front suspension controller and the suspension pump solenoid for rubbed-through insulation causing a short to ground or power.

2. 2

   Disconnect the solenoid and inspect the connector pins for corrosion, water ingress, or damage.

3. 3

   Measure the resistance of the solenoid coil with a multimeter. A reading of near-zero ohms indicates the coil is internally shorted.

4. 4

   Check the front suspension 12V supply fuses (e.g., 12VM, 12VF1, 12VF3) to verify if an over-current event blew the corresponding circuit fuse.

1. 1

   Relieve hydraulic pressure

   Turn off the tractor, lower the front suspension if possible, and ensure all hydraulic pressure is relieved from the front suspension accumulator and valve block.

2. 2

   Locate manifold

   Locate the front suspension control valve manifold (typically mounted near the front axle).

3. 3

   Disconnect connector

   Disconnect the electrical connector from the 'pump' solenoid valve.

4. 4

   Remove faulty coil

   Remove the retaining nut at the top of the solenoid and slide the faulty solenoid coil off the valve cartridge. (Note: If the cartridge itself is physically damaged or stuck, unscrew the cartridge from the manifold and replace both).

5. 5

   Install new coil

   Install the new solenoid coil, ensuring that the O-ring is correctly located under the retaining nut, and tighten.

6. 6

   Reconnect harness

   Reconnect the electrical harness.

7. 7

   Clear codes and calibrate

   Clear the fault codes via the cab monitor. You may need to run a front suspension calibration procedure after the repair is complete.