Massey Ferguson 6.02.04 – HITCH: Issue With PTO Solenoid Circuit

The control unit has detected an electrical irregularity in the PTO solenoid circuit, such as an open circuit, a short to ground, or a short to power. This fault prevents the rear PTO from functioning correctly, causing it to hesitate, fail to engage entirely, or fail to disengage.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 5709
• 7714
• 7715
• 7716
• 7718
• 7719
• 7720
• 7722
• 7724
• 7726
• 4700 Series
• 5400 Series
• 5600 Series
• 6400 Series
• 6600 Series
• 6700 Series
• 7600 Series
• 8700 Series

1. 1

   Inspect the PTO solenoid connector and the wiring harness for rub points, frayed wires, or corrosion, as a short to ground is a highly common cause.

2. 2

   With the tractor and key off, disconnect the solenoid and test the coil resistance using a multimeter. A healthy OEM PTO solenoid coil should read approximately 10 Ohms; an open or shorted reading indicates a dead solenoid.

3. 3

   Verify that the solenoid is receiving a 12-volt signal when the PTO switch is activated in the cab.

4. 4

   Check the hydraulic fluid level and condition, because dirty or low hydraulic fluid can cause the mechanical valve inside the solenoid to stick.

1. 1

   Prep the machine

   Park the tractor on a level surface, turn off the engine, and allow it to cool. Relieve all hydraulic system pressure and disconnect the battery to prevent electrical shorts during the repair.

2. 2

   Locate the solenoid

   Locate the PTO solenoid valve, which typically mounts directly to the transmission housing where the hydraulic lines connect to the PTO clutch system.

3. 3

   Disconnect wiring

   Unplug the electrical wiring harness connector from the solenoid.

4. 4

   Remove the valve

   Unbolt the retaining hardware and carefully pull the old solenoid valve out of the transmission housing. Have a catch pan ready, as a small amount of hydraulic fluid will leak out.

5. 5

   Install the new valve

   Clean the mounting surface. Lubricate the O-rings and seals on the new solenoid valve with clean hydraulic fluid to prevent pinching. Insert the new valve and torque the mounting hardware to OEM specifications.

6. 6

   Reconnect wiring

   Plug the electrical harness back into the new solenoid.

7. 7

   Test operation

   Reconnect the battery. Start the tractor, allow hydraulic pressure to build, and test the PTO engagement from the cab. Inspect the mounting area for any hydraulic leaks.