Massey Ferguson 04.02.50 – TRANS: Transmission Filter Blocked (TRANS)

The transmission/hydraulic oil filter has become restricted or clogged with debris. When the filter is blocked, the pump struggles to force oil through it, causing a pressure differential that triggers the transmission filter blockage sensor.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 4707
• 4708
• 4709
• 4710

1. 1

   Check transmission/hydraulic fluid levels and condition to verify correct level and temperature

2. 2

   Listen for whining, rumbling, or growling noises from the transmission or hydraulic pump, which indicates the pump is struggling against a clogged filter

3. 3

   Inspect for internal wear, as worn brake linings or clutch material shedding into the oil is a common cause of premature filter blockage

4. 4

   Verify the transmission filter blockage sensor and its wiring haven't failed (look for related codes like 04.02.49 or 04.02.56)

1. 1

   Preparation

   Park the tractor on a level surface, turn off the engine, and allow the transmission fluid to cool.

2. 2

   Locate the Filters

   Depending on the transmission type (e.g., Dyna-VT or Dyna-6), locate the transmission filters. There is typically a main external high-pressure oil filter on the right-hand side of the transmission housing, and/or a top-of-tank filter.

3. 3

   Drain/Catch Fluid

   Place a suitable drain pan underneath the filter housing to catch any hydraulic/transmission fluid that escapes during removal.

4. 4

   Remove the Filter

   Unscrew the spin-on filter or remove the filter housing cover to extract the internal filter element.

5. 5

   Inspect for Debris

   Inspect the old filter element for heavy metal shavings or fibrous brake lining material. If heavy debris is found, a larger transmission or brake teardown may be required.

6. 6

   Install New Filter

   Lubricate the new filter's O-ring or gasket with clean transmission fluid. Install the new filter and tighten to the manufacturer's specifications.

7. 7

   Refill and Test

   Top up the transmission/hydraulic fluid to the correct level. Start the tractor, check the filter housing for leaks, and verify that the dashboard warning light and the 04.02.50 fault code have cleared.