Water Pump for John Deere 4050, 4450, 4650, 4850, 4955, 8450 Tractors – RE55985

Fits Models At A Glance:

• John Deere Tractors (50 Series): 4050, 4250, 4450, 4650, 4850
• John Deere Tractors (55 Series): 4055, 4255, 4455, 4555, 4755, 4955
• John Deere Tractors (60 Series): 4560, 4760, 4960
• John Deere 4WD Tractors: 8450, 8650
• John Deere Wheel Loaders: 644D, 644E, 644ER, 644EZ
• John Deere Excavators: 690C, 690CR, 892DLC
• John Deere Excavators: 790 — Before Serial Number 7915; 790D — Before Serial Number 8754; 792 — Before Serial Number 9460; 793D — Before Serial Number 740766
• John Deere Motor Graders: 770A, 770AH — Before Serial Number 501994; 772A, 772AH
• John Deere Motor Graders: 770B, 770BH, 772B, 772BH
• John Deere Crawler Dozers: 850B — Before Serial Number 809268
• John Deere Forestry – Skidders: 540E, 640E, 740E, 548E, 648E, 748E
• John Deere Forestry – Skidders: 540G — Before Serial Number 624870; 640G — Before Serial Number 612567; 548G — Before Serial Number 578013; 648G — Before Serial Number 612635; 740G, 748G
• John Deere Forestry – Feller Bunchers: 693C; 793D — Before Serial Number 740766

Key Notes:

• Part Numbers: RE55985, AR93517, RE23291, RE25416, RE43131, R83561, SE500912
• Casting Number: Replaces pumps with casting R71224
• Type: Engine water pump (coolant pump)
• Engine Compatibility: John Deere 6466D, 6466T, 6466A (Engine Serial Number 067685 and up) and 6076 7.6L (Engine Serial Number 499999 and below)
• Drive Gear Width: 0.617 in
• Weight: 33.10 lbs (15.01 kg)
• Engine/Fitment Notes: Fits machines built with the 6466 or 6076 engine. Some skidders and excavators listed were also built with other engines — confirm your engine model, or check that your old pump is marked R83561 or R71224, before ordering.
• Application: Circulates coolant through the engine block, cylinder head and radiator to control engine temperature.
• Condition: Replacement Part for John Deere Equipment

Common Use Case or Symptoms: Use when coolant is leaking from the weep hole, the engine is running hot, or the pump bearing is noisy or loose — a failing pump lets the engine overheat under load.

Why Choose Broken Tractor:

• ✅ One Pump That Replaces Seven Deere Numbers – RE55985, AR93517, RE43131, R83561 and more
• ✅ Serial Breaks Spelled Out for Every Model – match your excavator, grader or skidder before ordering
• ✅ Fast Shipping from a U.S.-Based Team – ready to ship from our U.S. warehouses