Massey Ferguson 04.2.03 – TRANS: Issue With Clutch Pedal Safety Start Switch (TRANS)

The clutch starter safety switch (bottom-of-clutch switch) has failed. This can cause a no-start condition, a safety hazard where the tractor starts without the clutch engaged, or a loss of drive and inconsistent gear-engagement behavior.

• 4707
• 4708
• 4709
• 4710
• T4 (2015-2021)
• 5425
• 5435
• 5445
• 5455
• 5460
• 5465
• 5470
• 5475
• 5480
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 6235
• 6280
• 6290
• 6445
• 6455
• 6460
• 6465
• 6470
• 6475
• 6480
• 6485
• 6490
• 6495
• 6497
• 6499
• 7465
• 7475
• 7480
• 7485
• 7490
• 7495
• 7497
• 7499
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7715
• 7716
• 7718
• 7719
• 7720
• 7722
• 7724
• 7726
• 8450
• 8460
• 8470
• 8480

1. 1

   Locate the switch in the pedal box under the dashboard/cab floor, near the clutch pedal.

2. 2

   Inspect the switch for physical damage, dirt, corrosion, or wear that might cause it to stick open or closed.

3. 3

   Check for voltage by removing the switch's electrical plug and testing the harness for battery voltage using a multimeter.

4. 4

   Test the switch for continuity using a multimeter set to ohms. It should display infinity (open circuit) when released and continuity (closed circuit) when depressed.

1. 1

   Prepare tractor

   Ensure the tractor is turned off, parked on a level surface, and the key is removed from the ignition.

2. 2

   Locate switch

   Locate the 'Bottom Of Clutch Switch' in the pedal box assembly.

3. 3

   Disconnect harness

   Disconnect the electrical wiring harness connector from the switch.

4. 4

   Remove switch

   Remove the faulty switch (typically unbolts or twists out of its mounting bracket).

5. 5

   Install new switch

   Install the new OEM replacement switch into the bracket.

6. 6

   Reconnect harness

   Reconnect the electrical wiring harness.

7. 7

   Test operation

   Start the tractor to ensure the engine only cranks when the clutch is fully depressed. Test the transmission to ensure drive engages properly without dropping out.

8. 8

   Verify calibration

   Note: According to Massey Ferguson repair guidance, once the bottom-of-clutch switch has been replaced, the problem should be solved without any additional programming or calibration required.