Massey Ferguson 4.00.6A – TRANS1: Issue With Range 4 Solenoid Valve (TRANS1)

The controller detects an electrical fault in the L55 (Range 4) solenoid circuit, such as an open circuit, a short circuit to +12V, or a short circuit to 0V (ground).

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5709
• 6445-6499
• 6612-6616
• 6711-6718S
• 7614-7626
• 7714-7726

1. 1

   Check transmission control fuses (typically F4 and F29) to verify they are intact and supplying proper voltage.

2. 2

   Visually inspect the wiring harness between the Autotronic 5 controller and the transmission solenoid bank for chafed wires causing a short.

3. 3

   Disconnect the electrical connector at the L55 solenoid and measure resistance across the pins (should be approximately 9.7 Ohms at ambient temperature).

4. 4

   Ensure the Range 4 position switch (L59) is functioning correctly to rule out switch inconsistencies.

1. 1

   Preparation

   Park the tractor on a level surface, engage the parking brake, and turn off the engine. Relieve any residual hydraulic pressure if required by your specific model's service manual.

2. 2

   Locate the Solenoid

   Locate the transmission control valve block on the right side of the transmission housing. The Range 4 solenoid (L55) is part of a bank of four range solenoids (L52, L53, L54, L55).

3. 3

   Removal

   Disconnect the electrical connector from the L55 solenoid. Remove the retaining screws/flange holding the solenoid valve in place. Carefully pull the solenoid valve out of the hydraulic block.

4. 4

   Installation

   Ensure the mounting surface and hydraulic ports are absolutely clean to prevent contamination of the wet clutch/transmission system. Lubricate the O-rings on the new solenoid with clean transmission fluid. Insert the new solenoid and tighten the retaining screws.

5. 5

   Reconnection & Reset

   Reconnect the electrical harness. To reset the Autotronic 5 system, turn the ignition on, move the PowerControl lever to the neutral position, and then press and release the clutch pedal.

6. 6

   Testing

   Start the tractor and shift through the ranges to confirm Range 4 engages smoothly and the fault code does not return.