For single-speed 540 rpm independent PTO drive shaft. Tractors: 5000, 7000 (6/1973-1975), 5600, 5700, 6600, 6700, 7600, 7700 (1975-1981), 5610, 6610, 6710, 7610, 7710 (1981-9/1989), 5610S, 6610S, 7610S (1/1994-12/1994). Replaces D2NNN752B, E3NNN752AA.