Engine Coolant Water Pump for John Deere 6M, 6R, 7R, T & W Series (6068 Engines) - Part Number: 74702407
The engine coolant water pump (part number 74702407, original equipment reference RE557899) is an OEM-standard, heavy-duty mechanical hydraulic component engineered for forced coolant circulation on John Deere PowerTech 6.8-liter 6-cylinder diesel engines (6068 HL, RW, and HZ series engine builds). Manufactured with advanced sintered mechanical face seals resistant to high thermal cycles and heavy-duty sealed double-row bearings, it ensures consistent heat transfer away from the cylinder block and head, preventing thermal spikes, cavitation, and equipment downtime on high-horsepower John Deere 6M, 6R, and 7R Series tractors as well as T and W Series combine harvesters.
Key Features & Engineering Benefits
- Hydraulically Calibrated for John Deere 6068 (6.8L) Engines: Precision-profiled internal impeller delivers high-volume, uniform volumetric flow across all engine operating speeds, maintaining cooling efficiency during heavy draft work, deep tillage, and full PTO loads.
- Heavy-Duty Sintered Mechanical Face Seal: High-grade friction rings withstand elevated system pressures, thermal cycling, and aggressive chemical degradation from modern ethylene glycol and extended-life OAT/HOAT coolant mixtures.
- High-Capacity Double-Row Ball Bearings: Sealed-for-life bearing assembly is engineered to absorb continuous high radial drive-belt tension without developing shaft endplay, tilt, or operational chatter.
- Direct OEM Interchangeability (Plug & Play): Flange geometry and bolt patterns conform precisely to factory John Deere machining specifications, serving as a direct drop-in replacement for OEM part number RE557899.
- Corrosion-Resistant Cast Housing: Heavy-duty casting engineered to resist cavitation erosion, internal rust scaling, and heavy thermal expansion cycles throughout intensive harvesting and field seasons.
Technical Specifications
| Commercial Part Number |
74702407 |
| Original Equipment Reference (OEM) |
RE557899 |
| Product Classification |
Centrifugal engine coolant water pump |
| Vehicle Make Compatibility |
John Deere (Agricultural Tractors & Combines) |
| Engine Series Compatibility |
John Deere PowerTech 6.8L (6068 HL, RW, HZ Series) |
| Coolant Media Compatibility |
Ethylene glycol solutions, OAT, HOAT hybrid coolants, and treated water |
Specific Engine Build Models (John Deere 6068)
6068HL Series: 6068HL490, 6068HL495, 6068HL497, 6068HL498, 6068HL499, 6068HL500, 6068HL501, 6068HL502, 6068HL503, 6068HL504, 6068HL505, 6068HL506, 6068HL507, 6068HL508, 6068HL555, 6068HL557, 6068HL558
6068RW Series: 6068RW425, 6068RW426, 6068RW427, 6068RW428, 6068RW430, 6068RW431, 6068RW434, 6068RW435, 6068RW436, 6068RW438, 6068RW446, 6068RW501, 6068RW502
6068HZ Series: 6068HZ490, 6068HZ491, 6068HZ500, 6068HZ501, 6068HZ502, 6068HZ503
John Deere Application Coverage
| Series Family |
Compatible Machine Models |
| 6M Series Tractors |
6155M, 6175M, 6195M |
| 6R Series Tractors |
6145R, 6155R, 6175R, 6195R, 6215R, 6230R, 6250R |
| 7R Series Tractors |
7210R, 7230R, 7250R, 7270R |
| T Series Combine Harvesters |
T550 |
| W Series Combine Harvesters |
W540, W550 |
Installation & Service Note: Thoroughly drain and flush the entire cooling circuit prior to pump replacement to eliminate abrasive particulate matter, scale, and rust deposits. Thoroughly clean and degrease the engine block mounting face. Fit matching gaskets dry without silicone sealant or petroleum grease, and 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.
