Massey Ferguson 13.X.30 – TRANS1: Park Brake System Pressure Issue Dyna VT

This code indicates that the electronic control system has detected an irregularity in the hydraulic or air pressure within the park brake circuit. The system is either seeing pressure that is too high, failing to drop when the brake is applied, or losing pressure unexpectedly.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 6614
• 6615
• 6616
• 6713 S
• 6714 S
• 6715 S
• 6716 S
• 6718 S
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 8650
• 8660
• 8670
• 8680
• 8690
• 8727
• 8730
• 8732
• 8735
• 8737
• 8740
• 6S Series
• 7S Series
• 8S Series

1. 1

   Check for related TRANS1 codes that might narrow down the issue, such as 13.00.15 (Solenoid Open Circuit), 13.00.16 (High Amp Draw), 13.00.18 (Pressure Not Dropped When Applied), or 13.00.1A (Park Lock Proximity Switch Issue).

2. 2

   Inspect the wiring harness between the TRANS1 module, the park brake pressure sensor, and the park brake solenoid for chafing, short circuits to earth, or open circuits.

3. 3

   Test the handbrake pressure sensor signal to ensure it is reading within its normal operating range and not short-circuiting.

4. 4

   Test the park brake release solenoid for proper resistance and amp draw, as a failed coil will often trigger pressure faults because the valve fails to open/close the hydraulic circuit properly.

1. 1

   Depressurize the System

   Ensure the tractor is parked on level ground, the engine is off, and the hydraulic/air systems are safely depressurized before opening any lines.

2. 2

   Locate the Components

   Locate the park brake valve block (usually mounted near the transmission/rear axle housing).

3. 3

   Inspect/Replace the Sensor

   If diagnostics point to a faulty reading, disconnect the electrical connector from the handbrake pressure sensor. Unthread the old sensor, install the new OEM sensor, and reconnect the harness.

4. 4

   Inspect/Replace the Solenoid

   If the solenoid coil is burnt out or failing under load, remove the retaining nut on the solenoid valve stem. Slide the old coil off and replace it with the new solenoid switch/coil. If the valve cartridge itself is sticking, the entire solenoid valve kit may need to be replaced.

5. 5

   Re-test

   Clear the 13.X.30 fault code using an electronic diagnostic tool. Start the tractor and cycle the park brake on and off several times. Verify that the TRANS1 module registers the correct pressure drop and spike without logging new codes.