Massey Ferguson 13.03.45 – HITCH: Park Brake Activated Solenoid Voltage Issue

The HITCH controller has detected a voltage issue with the park brake activated solenoid on the Dyna-6 transmission.

• 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
• 6485
• 6490
• 6495
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 5709SL
• 6713S
• 6714S
• 6715S
• 6716S
• 6717S
• 6718S

1. 1

   Inspect the main fuse box for blown fuses related to the transmission control and HITCH module

2. 2

   Inspect the wiring harness leading to the park brake solenoid on the side of the transmission for chafing, breaks, or severe corrosion at the connector

3. 3

   Disconnect the park brake solenoid and use a multimeter to check for proper supply voltage from the HITCH controller when the park brake is activated

4. 4

   Test the internal resistance of the solenoid coil to determine if it is shorted or open (solenoid failure cause)

5. 5

   Verify the physical park brake switch in the cab is opening and closing correctly to rule out conflicting signals (switch failure cause)

1. 1

   Locate the Solenoid Bank

   The range change and park brake solenoids are located externally on the side of the Dyna-6 transmission housing.

2. 2

   Clean the Area

   Thoroughly clean the area around the solenoid bank to prevent dirt from entering the hydraulic system when the valve is removed.

3. 3

   Disconnect Electrical Connector

   Unplug the wiring harness from the faulty park brake activated solenoid.

4. 4

   Remove the Solenoid

   Remove the retaining bolts or clips holding the solenoid valve in place and carefully pull the solenoid out of the transmission block.

5. 5

   Install the New Solenoid

   Lubricate the O-rings on the new solenoid with clean transmission fluid. Insert it into the block and torque the retaining bolts to OEM spec.

6. 6

   Reconnect and Clear Codes

   Reconnect the wiring harness. Turn the tractor on and use the onboard diagnostic screen (or a dealer tool) to clear the 13.03.45 fault code.

7. 7

   Transmission Calibration

   It is highly recommended to perform a Dyna-6 transmission calibration after replacing transmission solenoids to ensure smooth engagement and progressivity.