Case IH 5008 – ATC (Armrest Tractor Controller) or CCM (Chassis Control Module): Rear Power Take-Off (RPTO) control circuit issue

Indicates a critical electrical issue within the Rear Power Take-Off (RPTO) control circuit, which can be caused by a Rear PTO solenoid circuit overcurrent (short to ground), a switch short/conflict, or an open circuit.

• MAXXUM T4E
• Magnum 180
• Magnum 200
• Magnum 220
• Magnum 235
• Magnum 240
• Magnum 250
• Magnum 280
• Magnum 310
• Magnum 340
• Magnum 380
• Steiger 350
• Steiger 370
• Steiger 420
• Steiger 470
• Steiger 500
• Steiger 550
• Steiger 600
• Maxxum 100
• Maxxum 110
• Maxxum 115
• Maxxum 120
• Maxxum 125
• Maxxum 135
• Maxxum 140
• Maxxum 145
• Maxxum 150
• Puma 150
• Puma 165
• Puma 185
• Puma 200
• Puma 220

1. 1

   Inspect the Rear PTO cab switches and remote fender-mounted PTO switches to ensure they are not physically stuck, damaged, or packed with debris (diagnoses switch short/conflict cause).

2. 2

   Trace the wiring harness from the ATC/CCM to the Rear PTO solenoid. Look for chafed insulation, pinched wires, or bare spots rubbing against the tractor chassis (diagnoses short to ground cause).

3. 3

   Disconnect the 2-pin electrical connector at the RPTO solenoid (wire numbers 2042 and 2051) and check for corrosion, water ingress, or melted pins.

4. 4

   Use a multimeter to measure the resistance across the pins of the Rear PTO solenoid. A reading of near 0 ohms indicates the solenoid coil has failed and shorted internally.

1. 1

   Park and disconnect battery

   Park the tractor on a level surface, turn off the engine, and disconnect the negative battery cable to prevent electrical spikes.

2. 2

   Locate solenoid valve

   Locate the Rear PTO Clutch Solenoid Valve. On most Case IH models, this is located on the rear left-hand top of the transmission housing or on the dedicated PTO valve block.

3. 3

   Clean area

   Thoroughly clean the area around the solenoid valve with brake cleaner or compressed air to prevent dirt from entering the hydraulic system during removal.

4. 4

   Unplug connector

   Unplug the 2-pin electrical connector from the solenoid.

5. 5

   Remove solenoid valve

   Remove the retaining bolts holding the solenoid valve to the transmission/valve block and carefully extract the valve.

6. 6

   Lubricate O-rings

   Lubricate the O-rings on the new OEM replacement solenoid with clean Case IH Hy-Tran hydraulic fluid.

7. 7

   Install new solenoid

   Insert the new solenoid valve into the manifold and tighten the retaining bolts to the OEM torque specification.

8. 8

   Reconnect harness

   Reconnect the 2-pin electrical harness.

9. 9

   Clear fault code

   Reconnect the battery, turn the key on, and use the tractor's diagnostic menu to clear the 5008 fault code.

10. 10

    Test engagement

    Start the tractor and test the Rear PTO engagement to ensure the clutch engages smoothly and the code does not return.