Massey Ferguson T135 – Autotronic 5: Issue With Range 4 Solenoid Valve (TRANS1)

The transmission controller detects an electrical fault on the circuit for the Range 4 solenoid valve (L55 or X487), indicating an open circuit or a short circuit to +12 V or 0 V (ground).

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• 5400 Series
• 5425
• 5455
• 5465
• 5600 Series
• 5700 Series
• 5709
• 5710
• 5711
• 5712
• 5713
• 6400 Series
• 6445
• 6455
• 6460
• 6465
• 6600 Series
• 6700 Series
• 7600 Series
• 7700 Series
• 7714
• 7715
• 7718
• 7719
• 7720

1. 1

   Locate the Range 4 solenoid valve (L55/X487) on the transmission valve block and inspect the electrical connector for moisture, corrosion, or pushed-out pins.

2. 2

   Disconnect the harness at the solenoid and at the Autotronic 5 module, then test the wiring for continuity.

3. 3

   Test the solenoid wiring for a short to ground (0V) or a short to power (+12V).

4. 4

   Measure the resistance across the pins of the Range 4 solenoid valve itself. A healthy OEM transmission solenoid typically reads around 10 Ohms. If the coil is open (infinite resistance) or shorted, replace the valve.

1. 1

   Depressurize

   Ensure the tractor is turned off, parked on a level surface, and hydraulic pressure is relieved.

2. 2

   Access the Valve Block

   Locate the transmission control valve block. The Range 4 solenoid (L55) is grouped with the Range 1 (L52), Range 2 (L53), and Range 3 (L54) solenoids.

3. 3

   Disconnect

   Unplug the electrical connector from the Range 4 solenoid.

4. 4

   Remove the Solenoid

   Remove the retaining screws/flange holding the L55 solenoid valve in place. Pull the valve assembly out of the transmission housing.

5. 5

   Install the New Valve

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

6. 6

   Reconnect and Clear Codes

   Reconnect the wiring harness. Use the Massey Ferguson Wintest diagnostic software (or equivalent dealer tool) to clear the T135 fault code.

7. 7

   Test

   Start the tractor and shift through all transmission ranges to ensure Range 4 engages smoothly and the code does not return.