Sep. Blower Fan Hsgs Volt 12 Shaft Length 2 5/8″ Body Length 3 5/8″ Body Length 4 9/16″ Body Diameter 3″ Rotation CW C to C 2 5/16″ Shaft Diameter 5/16″ TRACTOR: 4000 TRACTOR: 4020 TRACTOR: 4030 (Cab S/N <167883) TRACTOR: 4040 (Cab S/N <67110) TRACTOR: 4230 (Early Design w/ 5/16" Shaft Dia.) TRACTOR: 4240 (Cab S/N <167110) TRACTOR: 4320 TRACTOR: 4430 (Early Design w/ 5/16" Shaft Dia.) TRACTOR: 4440 (Cab S/N <167110) TRACTOR: 4620 TRACTOR: 4630 (Early Design w/ 5/16" Shaft Dia.) TRACTOR: 4640 (Cab S/N <167110) TRACTOR: 4840 (Cab S/N <167110) TRACTOR: 5020 TRACTOR: 6030 TRACTOR: 7020 TRACTOR: 7520 (1972-1975) TRACTOR: 8430 Model Year 1974-1981 (Cab S/N <167882) TRACTOR: 8630 (Cab S/N <167882)