Case IH 6094 – PTO Controller: MFD (Mechanical Front Drive) Solenoid has failed Open or Short Circuit

The MFD solenoid valve controls the engagement and disengagement of the front-wheel assist clutch. The fault code triggers when the controller detects an electrical open or short in this solenoid's circuit.

• MX Magnum
• Case IH MX Series Magnum Tractors (MX210, MX230, MX255, MX285)
• Case IH Magnum Series (180, 190, 210)

1. 1

   Remove the controller cover from the rear of the tractor to access the PTO controller.

2. 2

   Disconnect the black connector (C057) from the PTO controller.

3. 3

   Inspect Pin 10 in the connector for corrosion or damage. Clean the mating pin and connector.

4. 4

   Test the resistance (continuity) between Pin 10 and the chassis ground. The resistance of the MFD solenoid circuit should be approximately 5.6 to 6.6 ohms.

5. 5

   If the resistance is out of spec (infinite/open or zero/shorted), check the wiring harness leading to the transmission. If the wiring is intact, the solenoid coil has failed.

1. 1

   Locate the Solenoid

   The MFD solenoid valve is mounted externally on top of the range transmission. Specifically, it is the front coil located on the range powershift manifold.

2. 2

   Disconnect Power

   Ensure the tractor is off and the key is removed.

3. 3

   Disconnect the Harness

   Locate and disconnect the electrical connector to the MFD solenoid (identified in wiring schematics as Connector No. 160).

4. 4

   Remove the Solenoid

   Unbolt/unscrew the faulty MFD solenoid valve from the manifold. Be prepared for a small amount of hydraulic oil to leak.

5. 5

   Replace Seals/O-Rings

   If reusing the valve body or installing a new cartridge, ensure the O-rings are replaced and lubricated with clean hydraulic fluid.

6. 6

   Install the New Solenoid

   Thread the new solenoid into the manifold and tighten to OEM torque specifications.

7. 7

   Reconnect and Clear

   Reconnect Connector No. 160, power on the tractor, clear the fault codes, and test the MFD engagement to ensure the code does not return.