Shaft, Hydraulic Pump Drive. PART NO: A-K944950. Long9.120" Dim B (2)Hollow end on shaft. Teeth19. . MODELS: Case-IH TRACTOR: 1490 Case-IH TRACTOR: 1494 David Brown TRACTOR: 1210 David Brown TRACTOR: 1212 David Brown TRACTOR: 1410 David Brown TRACTOR: 1412.