Engine Coolant Water Pump with Gasket for John Deere Tractors & Combines (6081 / PowerTech Engines) - Part Number: 74712104
The engine coolant water pump (part number 74712104, original equipment references RE521502, RE509598, RE57154, RE508249, supplied complete with mounting gasket) is an OEM-standard, heavy-duty mechanical hydraulic component engineered for forced coolant circulation on John Deere 6081 (PowerTech 8.1-liter) and PowerTech series diesel engines. Built with cavitation-resistant sintered mechanical face seals, heavy-duty double-row bearings designed for high belt tension loads, and a high-strength cast housing, it guarantees continuous heat transfer away from the cylinder block and liners under sustained peak workloads. This prevents thermal distortion, hot spots, and equipment failure on high-horsepower tractors (7000, 7010, 7020, 8000/8000T, 8010/8010T, 8020/8020T, 9000/9000T, 9020/9020T Series) as well as forage harvesters and combines (11, 22, 6050, CTS, CWS, STS, WTS Series).
Key Features & Engineering Benefits
- High-Flow Hydraulic Calibration for 8.1L Engines: Precision-profiled internal impeller generates high-volume, uniform coolant circulation across all engine RPMs, ensuring thermal equilibrium under maximum draft, deep ripping, and high PTO demands.
- Supplied Complete with Dedicated Gasket: Includes a form-fitted mounting gasket for instant, leak-free flange sealing directly against the engine block face without liquid gasket adhesives.
- Heavy-Duty Sintered Mechanical Face Seal: High-hardness friction faces resist abrasive wear, cavitation erosion, and chemical degradation from boiling coolant mixtures, ethylene glycol, and extended-life OAT/HOAT additive packages.
- High-Capacity Double-Row Bearings: Sealed-for-life bearing assembly is built to absorb continuous radial drive-belt tension without developing axial play, shaft misalignment, or rotational vibration.
- Direct OEM Interchangeability (Plug & Play): Flange geometry and bolt patterns conform precisely to factory John Deere machining specifications, directly replacing OEM part numbers RE521502, RE509598, RE57154, and RE508249.
Technical Specifications
| Commercial Part Number |
74712104 |
| Primary Original Equipment References (OEM) |
RE521502, RE509598, RE57154, RE508249 |
| Cross-Reference OEM Codes |
RE57154, RE521502, RE509598, RE508249 |
| Included Hardware |
Complete water pump unit with dedicated sealing gasket |
| Product Classification |
Centrifugal diesel engine coolant water pump |
| Engine Series Compatibility |
John Deere 6081 (PowerTech 8.1L) & PowerTech Engines |
| Coolant Media Compatibility |
Ethylene glycol solutions, OAT, HOAT hybrid coolants, and treated water |
John Deere Machine Application Coverage
| Series Family |
Compatible Machine Models |
| 7000 / 7010 / 7020 Series Tractors |
7200 | 7710, 7810 | 7720, 7820, 7920 |
| 8000 / 8000T Series Tractors |
8100, 8100T, 8200, 8200T, 8300, 8300T, 8400, 8400T |
| 8010 / 8010T Series Tractors |
8110, 8110T, 8210, 8210T, 8310, 8310T, 8410, 8410T |
| 8020 / 8020T Series Tractors |
8120, 8120T, 8220, 8220T, 8320, 8320T, 8420, 8420T, 8520, 8520T |
| 9000 / 9000T / 9020 / 9020T Series |
9100 | 9120, 9220, 9320, 9420, 9520, 9620 |
| 6010 Series / 11 Series |
6610 | 1185 |
| 6050 Series Forage Harvesters |
6650 |
| 22 / 9000 Series Combines |
2256, 2258, 2264, 2266 | 9550, 9610 |
| CTS / CWS / STS Series Combines |
CTS, CTS 9650, CTS 9660, CTS 9780, CTS II | CWS 1550 | STS 9650 |
| WTS Series Combines |
WTS 1550, WTS 9540, WTS 9560, WTS 9580, WTS 9640, WTS 9660, WTS 9680 |
Installation & Service Note: Drain and flush the entire cooling system prior to pump replacement to eliminate abrasive particulate matter, scale, and rust deposits that could compromise the new mechanical seal. Thoroughly clean and degrease the engine block mounting face. Fit the included gasket completely dry without silicone sealant or petroleum grease. Torque mounting bolts in a diagonal criss-cross pattern to factory John Deere torque settings. Refill with approved antifreeze, bleed trapped air from the circuit, and perform an operating temperature test to ensure leak-free operation.
