Case IH 2910-03 - DEC – Transmission Control Unit (TCU) or Vehicle/Chassis Controller: PTO rear clutch solenoid electrical circuit fault - voltage above normal

The controller is detecting a voltage on the rear Power Take-Off (PTO) clutch solenoid circuit that is higher than the expected operating range. This condition is typically caused by a short to power, an internal short within the solenoid coil itself, or a failure within the control module sending constant voltage when it shouldn't.

• MAGNUM AFS Connect
• Magnum 210
• Magnum 235
• Magnum 260
• Magnum 290
• Magnum 315
• Magnum 340
• Maxxum 100
• Maxxum 110
• Maxxum 115
• Maxxum 120
• Maxxum 125
• Maxxum 130
• Maxxum 140
• Maxxum 150
• Puma 165
• Puma 180
• Puma 195
• Puma 210
• Puma 225
• CVX 165
• CVX 180
• CVX 195
• CVX 210
• CVX 225
• Farmall 85C
• Farmall 95C
• Farmall 105C
• Farmall 105U
• Farmall 115U
• MXU series
• MX series

1. 1

   Visually inspect the wiring harness leading from the transmission controller to the rear PTO solenoid for pinched wires, melted insulation, or chafing (diagnosing a short to power cause).

2. 2

   Disconnect the 2-pin connector at the rear PTO solenoid and inspect for water intrusion, corrosion, or bent pins.

3. 3

   With the key ON and the PTO switch OFF, measure voltage at the harness connector. If 12V is present, there is a short to power in the harness or a failed controller.

4. 4

   Measure the resistance (Ohms) across the two pins of the PTO solenoid. If resistance is near 0 ohms, the solenoid coil is internally shorted and must be replaced (diagnosing an internal short cause).

5. 5

   Verify the cab PTO switch or fender-mounted PTO switches are not stuck or internally shorted, which can send erroneous voltage signals to the controller.

1. 1

   Preparation

   Park the tractor on a level surface, turn off the engine, apply the parking brake, and disconnect the negative battery cable.

2. 2

   Locate the Valve

   Locate the rear PTO clutch solenoid valve. It is typically mounted on the rear transmission/axle hydraulic valve block assembly (often grouped with the differential lock and MFWD solenoids).

3. 3

   Clean the Area

   Thoroughly clean the area around the solenoid with brake cleaner or a degreaser to prevent dirt from entering the hydraulic system when the valve is removed.

4. 4

   Disconnect

   Unplug the electrical harness connector from the solenoid.

5. 5

   Removal

   Remove the retaining nut or mounting bolts holding the solenoid coil/cartridge to the valve block. Carefully pull the solenoid cartridge out of the block. Note: Have a catch pan ready, as a small amount of hydraulic fluid will leak out.

6. 6

   Installation

   Lubricate the O-rings on the new solenoid valve with clean hydraulic fluid. Insert the new valve into the block and tighten the retaining nut/bolts to the OEM torque specification.

7. 7

   Reassembly

   Reconnect the electrical harness connector.

8. 8

   Testing

   Reconnect the battery, start the tractor, and test the rear PTO engagement. Inspect the valve block area for any hydraulic leaks.

9. 9

   Clear Codes

   Use a diagnostic tool or the tractor's onboard display to clear the 2910-03 fault code.