Hydraulic pump Assembly: Splined Shaft, 65 cm, 1 1/16" Discharge Port, 1 1/16" Inlet PortJohn Deere: 4000, 4020, 4040, 4230, 4240, 4320, 4430, 4440, 4520, 4620, 4630, 4640, 4555, 4560, 4650, 4755, 4760, 4850, 4955, 4960, 4830, 8440, 8450, 8630Please verify this is the correct pump for your application; some models listed may use a different pump.AR94661 - Pump has a one-year Manufacturer Warranty: Please ensure you change your fluid and filter before use of pump. Dirt / Trash found inside the pump can cause problems warranty claims. Labor is not covered under the Warranty. No returns will be accepted if the pump has been taken apart.