John Deere PTI524228.05 – PTI / PTP: Park Sump Block Circuit Problem

The transmission control unit has detected an electrical fault in the circuit for the park sump block solenoid, which could be an open circuit, a short circuit, or an out-of-spec voltage or resistance reading. The park sump block solenoid is a critical hydraulic component that controls the engagement of the parking pawl or brake. When this fault is active, the system cannot confirm the status of the park brake, resulting in a display warning and potentially preventing the tractor from being shifted out of park.

• 6M
• 6R
• 7R
• 8R
• 8RT
• 9R
• 7000 Series
• 8000 Series
• 8030 Series
• 8130
• 8230
• 8330
• 8430
• 8530
• 8310RT
• 8335RT
• 8360RT
• 9000 Series
• 9120
• 9220
• 9320
• 9420
• 9520
• 9620

1. 1

   Carefully visually inspect the wiring harness leading to the park sump block solenoid for any signs of damage, chafing, breaks, or corrosion on the connectors

2. 2

   With the key on, use a multimeter to check for voltage at the electrical connector of the solenoid (an out-of-range reading, such as 5.5V, indicates a circuit issue)

3. 3

   Disconnect the solenoid and measure the resistance across its terminals using a multimeter, comparing the reading to manufacturer specifications to check for a faulty solenoid coil

4. 4

   Inspect the wiring for any shorts to power or ground by checking for voltage on signal wires with the component disconnected, or checking for continuity to ground

1. 1

   Ensure safety

   Park the tractor on a level surface and block the wheels to prevent any movement. Disconnect the battery before starting any electrical work.

2. 2

   Locate the solenoid

   Locate the park sump block solenoid on the side of the transmission housing, often near other hydraulic control valves (e.g., on the left-hand side on models like the 7920).

3. 3

   Disconnect and remove

   Disconnect the electrical connector from the solenoid and note the routing of any hydraulic lines. Place a drain pan underneath to catch residual hydraulic fluid, then carefully unscrew and remove the old solenoid valve.

4. 4

   Install the new solenoid

   Clean the mounting surface thoroughly to prevent leaks or contamination. Install the new solenoid, ensuring it is tightened to the correct torque specification. Reconnect the electrical connector and any hydraulic lines.

5. 5

   Clear fault codes and test

   Reconnect the battery. Start the tractor and use the diagnostic display to clear the fault code. Operate the park brake multiple times to ensure it engages and disengages correctly and that the fault code does not reappear.