Massey Ferguson 06.X.1D – TRANS1: Issue With Voltage To 1000 PTO Speed Solenoid Dyna VT (TRANS1)

Indicates an electrical fault—specifically a voltage irregularity (such as an open circuit, short to ground, or short to power)—in the circuit that controls the solenoid responsible for engaging the 1000 RPM PTO speed on Dyna-VT transmissions.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 6713 S
• 6714 S
• 6715 S
• 6716 S
• 6718 S
• 8650
• 8660
• 8670
• 8680
• 8690
• 8727 S
• 8730 S
• 8732 S
• 8735 S
• 8737 S
• 8740 S

1. 1

   Inspect the wiring harness connector at the PTO speed solenoid for corroded wiring or moisture ingress.

2. 2

   Check the wiring harness between the TRANS1 controller and the solenoid for continuity, shorts to ground, or broken wires.

3. 3

   Test the solenoid coil with a multimeter to check for internal shorts or burnout.

4. 4

   Check hydraulic fluid and filters for contamination, which can cause internal valve components to stick and overwork the solenoid.

1. 1

   Depressurize

   Ensure the tractor is off and relieve all hydraulic pressure in the system.

2. 2

   Disconnect Power

   Disconnect the tractor's battery to prevent electrical shorts during the repair.

3. 3

   Locate and Disconnect

   Locate the 1000 PTO speed solenoid on the transmission/PTO housing. Disconnect the electrical connector.

4. 4

   Remove the Valve

   Unbolt/unscrew the faulty solenoid valve from its mounting point.

5. 5

   Clean the Area

   Thoroughly clean the mounting surface. Ensure no dirt, grease, or debris falls into the open hydraulic port.

6. 6

   Install the New Valve

   Fit the replacement solenoid valve into the original mounting points.

7. 7

   Reconnect

   Plug the electrical connector back in (cleaning any residual corrosion from the plug first) and reconnect the battery.

8. 8

   Test

   Start the tractor and test the PTO engagement and speed selection via the cab switches to ensure the TRANS1 module registers the voltage correctly.

9. 9

   Filter Maintenance

   It is highly recommended to change your hydraulic filter after this repair to prevent future valve sticking.