Fits the following makes and models:
John Deere ENGINE: 6404 (SN <214999, EARLY POWER BOOSTER ENG)
John Deere INDUSTRIAL/CONSTRUCTION: 600 (SN <214999 w/ 6.404D 6Cyl Eng)
John Deere TRACTOR: 4000 (SN <214999)
John Deere TRACTOR: 4010 (SN <214999 6.404D 6Cyl Eng)
John Deere TRACTOR: 4020 (SN <214999 6.404D 6Cyl Eng)