Massey Ferguson 13.02.17 – TRANS1: Park Brake Release Solenoid Low Amp Draw Dyna VT (TRANS1)

The transmission controller is detecting a lower-than-expected electrical current (low amp draw) on the circuit that powers the park brake release solenoid. This typically indicates an open circuit, a broken wire, a loose connector, or a failed solenoid coil with high internal resistance.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 6600 Series (e.g., 6614, 6615, 6616)
• 6700 / 6700 S Series
• 7600 Series (e.g., 7614, 7615, 7618, 7624)
• 7700 / 7700 S Series (e.g., 7715, 7718, 7726)
• 8600 Series (e.g., 8660, 8670, 8690)
• 8700 / 8700 S Series (e.g., 8727, 8730, 8740)
• Newer 6S, 7S, and 8S Series with Dyna VT

1. 1

   Inspect the wiring harness and connectors running between the TRANS1 controller and the park brake release solenoid for chafed wires, corrosion, or loose pins.

2. 2

   Disconnect the park brake release solenoid and use a multimeter to measure the resistance across the solenoid coil pins. An infinite reading (OL) indicates an open internal circuit.

3. 3

   Check for continuity on the power and ground wires from the solenoid connector back to the TRANS1 module to rule out a broken wire in the harness.

4. 4

   Verify that the controller is sending the correct voltage to the solenoid when the park brake release is commanded.

1. 1

   Secure the Machine

   Park the tractor on a flat surface, turn off the engine, and chock the wheels (since you will be working on the park brake system).

2. 2

   Access the Solenoid

   Locate the park brake release solenoid on the transmission valve block. Depending on the specific model and cab configuration, you may need to remove a side panel or access it from under the cab.

3. 3

   Disconnect Wiring

   Carefully unplug the electrical connector from the faulty solenoid.

4. 4

   Remove the Solenoid

   Unbolt or unscrew the solenoid cartridge from the transmission valve block. Be prepared for a small amount of hydraulic fluid loss; have a catch pan ready.

5. 5

   Install the New Part

   Lubricate the O-rings on the new solenoid with clean hydraulic transmission fluid. Thread it into the valve block and tighten to OEM torque specifications.

6. 6

   Reconnect and Clear Codes

   Reconnect the wiring harness. Turn on the tractor, use a diagnostic tool to clear the 13.02.17 fault code, and test the park brake engagement and release to ensure smooth operation.