Massey Ferguson 13.02.42 – HITCH: Park Brake Released Solenoid Low Amp Draw Dyna 6 (HITCH)

The electronic control unit is detecting a lower-than-expected electrical current (amperage) when it attempts to energize the solenoid responsible for releasing the park brake, indicating an electrical open circuit such as a disconnected plug, severed wire, or burned-out solenoid coil.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 5400 Series
• 6400 Series
• 6600 Series

1. 1

   Visually inspect the wiring harness leading to the 'Park Brake Released' solenoid on the side of the Dyna 6 transmission for chafed wires, rodent damage, or a disconnected plug.

2. 2

   Unplug the solenoid and check the connector for water ingress, corrosion, or pushed-back pins.

3. 3

   Perform a coil resistance test using a multimeter across the two pins of the solenoid coil. An 'OL' (infinite resistance) or abnormally high resistance indicates the internal coil has failed.

4. 4

   Check the continuity of the wiring harness from the solenoid connector back to the HITCH controller.

5. 5

   With the tractor keyed on and the park brake commanded to release, check for 12V at the harness connector to ensure the HITCH controller is sending the signal.

1. 1

   Safety First

   Park the tractor on a level surface, turn off the engine, and securely chock the wheels (since you will be disabling the park brake system during repair).

2. 2

   Access the Valve Block

   Locate the transmission side cover/valve block where the park brake solenoids are housed.

3. 3

   Disconnect Wiring

   Unplug the electrical connector from the faulty Park Brake Released Solenoid.

4. 4

   Remove the Solenoid

   Depending on the specific valve block revision, either remove the retaining nut at the end of the stem to slide the electromagnetic coil off, or unbolt the entire cartridge valve from the block. (Note: Have a catch pan ready, as a small amount of hydraulic transmission oil may leak if the cartridge is removed).

5. 5

   Install the New Part

   Slide the new solenoid coil onto the valve stem and tighten the retaining nut (or thread the new cartridge valve in and torque to OEM specs).

6. 6

   Reassemble and Test

   Reconnect the electrical harness. Start the tractor, verify that the park brake engages and disengages properly without hesitation, and clear the inactive fault codes using the tractor's dashboard diagnostic menu or a dealer service tool.