Massey Ferguson 04.01.98 – TRANS1: Issue With Range 4 Engaged Switch And Range Solenoid 4 (TRANS1)

This indicates a control error, signal mismatch, or electrical failure involving the solenoid responsible for engaging Range 4 in the transmission and the corresponding micro-switch that verifies the range has physically engaged.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 5410
• 5420
• 5425
• 5435
• 5445
• 5455
• 5460
• 5465
• 5470
• 5475
• 5480
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5709
• 5710
• 5711
• 5712
• 5713
• 5709S
• 5710S
• 5711S
• 5712S
• 5713S
• 5709SL
• 6445
• 6455
• 6460
• 6465
• 6470
• 6475
• 6480
• 6485
• 6490
• 6495
• 6497
• 6499
• 6612
• 6613
• 6614
• 6615
• 6616
• 6711R
• 6712S
• 6713S
• 6714S
• 6715S
• 6716S
• 6718S
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Inspect the wiring harness and connectors between the TRANS1 module and the transmission side cover for damaged, bent, or dislocated pins, as well as open circuits or shorts to ground/power.

2. 2

   Test the coil resistance of Range Solenoid 4 (a healthy solenoid typically measures around 10 OHMs).

3. 3

   Inspect the Range 4 transmission switch plunger for sticking or internal failure.

4. 4

   Use an AGCO EDT, WinTest, or compatible diagnostic scanner to monitor live data from the transmission sensors and perform actuator tests on the solenoid.

1. 1

   Preparation

   Ensure the tractor is parked safely. Depending on the exact model and fluid level, you may need to drain the transmission oil or park the tractor on a steep incline to prevent fluid loss when removing the side cover components.

2. 2

   Locate Components

   Locate the transmission control valve block on the side of the transmission housing. Identify Range Solenoid 4 and the Range 4 Engaged Switch.

3. 3

   Removal

   Disconnect the electrical connectors from the faulty solenoid or switch. Remove the retaining bolts and carefully extract the component.

4. 4

   Installation

   Install the new solenoid or switch plunger. Ensure any O-rings or seals are seated correctly. Torque the retaining bolts to the specifications listed in your specific model's workshop manual.

5. 5

   Reconnection

   Reconnect the electrical harness.

6. 6

   Calibration & Clearing Codes

   Turn the key switch ON. Use an AGCO EDT, WinTest, or Jaltest diagnostic tool to clear the inactive fault codes. Perform a transmission/clutch calibration procedure if required by the software after replacing transmission control components. Test drive the tractor to ensure Range 4 engages smoothly and the code does not return.