Massey Ferguson T4150 – TRANS: Transmission Filter Blocked DYNA VT (TRANS)
Issue description
The high-pressure transmission oil filter blockage switch (X20 switch) has detected that the transmission filter is blocked or obstructed.
Applies to these machines
40 machines- 7622
- Interim Tier 4 (2012-2015)
- 7614
- 7615
- 7620
- 7616
- 7618
- 7619
- 7626
- 7624
- 6614
- 6615
- 6616
- 6713
- 6714
- 6715
- 6716
- 6718
- 7485
- 7490
- 7495
- 7497
- 7499
- 7715
- 7716
- 7718
- 7719
- 7720
- 7722
- 7724
- 7726
- 8660
- 8670
- 8680
- 8690
- 8727
- 8730
- 8732
- 8735
- 8737
Check the cause
Check the X20 Blockage Switch to verify if the high-pressure transmission oil filter blockage switch is faulty or sending an incorrect signal.
Inspect the transmission hydraulic oil quality to see if it is heavily polluted, degraded, or contaminated, which would cause premature filter blockage.
Repair steps
Locate filter
Locate the high-pressure transmission hydraulic filter (situated at the top of the tank on Dyna-VT models).
Remove filter
Remove the blocked transmission filter element.
Drain and refill oil
If the transmission oil was found to be polluted during the diagnostic check, drain the transmission oil and refill it with an approved fluid (such as AGCO V-TRANS PLUS 10W-40 or Terrac Extra).
Install new filter
Install the new Dyna-VT transmission filter element.
Replace switch
If the X20 transmission filter blockage switch was found to be faulty during testing, replace the switch.
Clear codes and test
Clear the fault codes from the Autotronic 4 transmission controller and test the tractor under load to ensure the code does not return.
Parts you might need
(6)Dyna-VT Hydraulic Transmission Filter
3909472M91OEM
Dyna-VT Hydraulic Transmission Filter
4351314M1OEM
Hydraulic Filter Assembly (OEM Kit)
4387670M91Includes filter, casing, and associated hardware for certain 6700S/7700S models
Dyna-VT Hydraulic Transmission Filter (Aftermarket)
HD 722MANN-FILTER
Transmission Filter Blockage Switch
Referred to in OEM manuals as the X20 Switch (order via dealer using X20 designation)
AGCO V-TRANS PLUS 10W-40 Transmission Fluid
OEM recommended for Dyna-VT
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