1640 Splined Shaft Pump w/o Serial Plate2040 Splined Shaft Pump w/o Serial Plate2040S Splined Shaft Pump w/o Serial Plate2140 Splined Shaft Pump w/o Serial Plate300 Splined Shaft Pump w/o Serial Plate3010 Splined Shaft Pump w/o Serial Plate3020 w/o Serial Plate400 Splined Shaft Pump w/o Serial Plate4000 w/o Serial Plate401 Splined Shaft Pump w/o Serial Plate4010 Splined Shaft Pump w/o Serial Plate401D Splined Shaft Pump w/o Serial Plate4020 w/o Serial Plate4030 Splined Shaft Pump w/o Serial Plate4040 w/o Power Front Wheel Drive, w/o Serial Plate4230 w/o Power Front Wheel Drive, w/o Serial Plate4240 w/o Power Front Wheel Drive, w/o Serial Plate4320 S/N 014560 and Below, w/o Power Front Wheel Drive, w/o Serial Plate4430 w/o Power Front Wheel Drive, w/o Serial Plate4440 w/o Power Front Wheel Drive, w/o Serial Plate4520 w/o Power Front Wheel Drive, w/o Serial Plate4620 w/o Power Front Wheel Drive, w/o Serial Plate4630 w/o Power Front Wheel Drive, w/o Serial Plate4640 w/o Power Front Wheel Drive, w/o Serial Plate4840 Splined Shaft Pump w/o Serial Plate5010 Splined Shaft Pump w/o Serial Plate5020 Splined Shaft Pump w/o Serial Plate6030 Splined Shaft Pump w/o Serial Plate7020 Splined Shaft Pump w/o Serial Plate7520 1972 - 75. Splined Shaft Pump, w/o Serial Plate.