Massey Ferguson 04.00.49 – TRANS: Transmission Filter Blockage Sensor Issue

The control module is receiving an abnormal signal (or no signal) from the transmission filter blockage sensor (X20). This condition can be triggered by a genuinely clogged transmission/hydraulic suction filter restricting fluid flow, cold and highly viscous hydraulic oil causing a false pressure differential, a failed sensor switch, or a wiring fault (such as a short or open circuit) in the sensor's harness.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 6400 Series
• 6600 Series
• 6700 Series
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Verify if the error only appears when the tractor is first started and the transmission oil is cold (cold, thick oil can trigger a false blockage alarm). Allow the tractor to reach operating temperature to see if the code clears.

2. 2

   Check the service hours on the transmission/hydraulic filters. If overdue for a change (typically every 1,200 hours), they may be genuinely blocked.

3. 3

   Locate the X20 transmission filter blockage sensor (right-hand side of gearbox) and inspect the wiring harness and connector for corrosion, loose pins, or broken wires.

4. 4

   Test the sensor switch for continuity using a multimeter to determine if the switch has failed internally.

1. 1

   Park and secure tractor

   Park the tractor on a level surface, engage the parking brake, and turn off the engine.

2. 2

   Locate sensor

   Locate the transmission filter blockage sensor (X20) on the transmission housing.

3. 3

   Inspect and clean connector

   Disconnect the electrical connector from the sensor. Clean the connector with electrical contact cleaner and inspect for damage.

4. 4

   Replace sensor if faulty

   If the sensor is deemed faulty, unscrew the old sensor and install a new OEM replacement sensor. Reconnect the wiring harness.

5. 5

   Prepare for filter replacement

   If the filter is suspected to be blocked (or is due for service), place a drain pan under the transmission filter housing.

6. 6

   Remove old filter

   Remove the transmission/hydraulic suction filter housing and extract the old filter element.

7. 7

   Install new filter

   Install a new genuine Massey Ferguson transmission filter, ensuring all O-rings and seals are properly seated and lubricated with clean hydraulic fluid.

8. 8

   Top up fluid

   Top up the transmission/hydraulic fluid to the correct level using the specified Massey Ferguson transmission fluid.

9. 9

   Verify repair

   Start the tractor, allow it to reach operating temperature, and verify that fault code 04.00.49 has cleared and there are no fluid leaks.