Massey Ferguson 06.01.E7 – TRANS1 (Transmission Module 1): Issue With Rear PTO On/Off Solenoid Power Supply Dyna VT (TRANS1)

The transmission controller is detecting an electrical fault (such as an open circuit, short, or voltage drop) in the power supply to the solenoid valve that controls the hydraulic flow for the rear Power Take-Off (PTO) clutch engagement. On Dyna-6 transmissions, it can also indicate a software issue.

• 7720S
• 7724S
• 7716
• 7720
• Tier 4 (2015-2021)
• 7718
• 7722
• 7722S
• 7715S
• 7718S
• 7715
• 7726
• 7719
• 7714
• 7724
• 7716S
• 7726S
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 6700S Series
• 8600 Series
• 8700S Series

1. 1

   Check the transmission/hydraulic fluid level and cleanliness, as dirty or low fluid can cause the PTO solenoid to stick or fail prematurely.

2. 2

   Inspect the wiring harness and connectors between the TRANS1 module and the rear PTO solenoid for rubbed wires, corrosion inside the connector, or loose pins.

3. 3

   Test the solenoid coil resistance using a multimeter to ensure it is not shorted out and is receiving consistent activation force.

4. 4

   Check with a dealer for available software updates or flashes for the TRANS1 module, as this code can sometimes indicate a software issue.

1. 1

   Safety First

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

2. 2

   Relieve Pressure

   Relieve all hydraulic system pressure before loosening any hydraulic components.

3. 3

   Locate the Solenoid

   Locate the Rear PTO On/Off Solenoid on the transmission housing.

4. 4

   Disconnect

   Unplug the electrical connector from the solenoid.

5. 5

   Remove

   Unbolt and carefully remove the faulty solenoid valve from the transmission block.

6. 6

   Install

   Lubricate the O-rings on the new solenoid valve with clean hydraulic fluid and install it into the housing. Torque the mounting bolts to OEM specifications.

7. 7

   Reconnect

   Plug the electrical connector back in, ensuring the weather seal is intact.

8. 8

   Test

   Reconnect the battery, top off the hydraulic fluid if any was lost, start the tractor, and test the PTO engagement from the cab to ensure smooth operation.