Massey Ferguson T5153 – TRANS1: Issue With Diff Lock Solenoid Circuit Dyna VT

The transmission controller has detected an electrical fault, such as an open circuit, short circuit, or out-of-range resistance, in the circuit responsible for actuating the differential lock solenoid valve. This can cause the differential lock to fail to engage or disengage properly.

• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 7615
• 7620
• 7616
• 7618
• 7619
• 7626
• 7624
• 6713
• 6715 S
• 6716 S
• 6718 S
• 7715 S
• 7716 S
• 7718 S
• 7719 S
• 8650
• 8660
• 8670
• 8680
• 8690
• 8727
• 8732
• 8735
• 8737 S
• 8737 MR

1. 1

   Inspect the electrical harness connecting the TRANS1 module to the differential lock solenoid for chafed wires, breaks, or shorts to ground

2. 2

   Disconnect the plug at the solenoid and check for dirt, moisture, or corroded pins

3. 3

   Use a multimeter to test the resistance of the solenoid coil to ensure it is not an open circuit (infinite resistance) or a dead short

4. 4

   Check transmission/hydraulic fluid to ensure it is clean and at the proper level, as contaminated fluid can cause internal valve components to stick

1. 1

   Preparation

   Park the tractor on a level surface, engage the parking brake, turn off the engine, and disconnect the battery to prevent accidental shorts.

2. 2

   Locate the Valve

   Locate the differential lock solenoid valve on the transmission's hydraulic control block.

3. 3

   Clean the Area

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

4. 4

   Disconnect

   Unplug the electrical harness connector from the solenoid.

5. 5

   Removal

   Unscrew the retaining nut or bolts holding the solenoid valve in place. Carefully pull the valve cartridge out of the manifold. Note: Have a catch pan ready, as a small amount of hydraulic fluid will leak out.

6. 6

   Installation

   Lubricate the O-rings on the new solenoid valve with clean hydraulic fluid. Carefully insert the new valve into the manifold and tighten it to the manufacturer's specified torque.

7. 7

   Reassembly

   Reconnect the electrical harness plug to the new solenoid.

8. 8

   Testing

   Reconnect the battery, start the tractor, and test the differential lock engagement. Check the area for hydraulic leaks and verify that the T5153 fault code has cleared from the dash.