256-7177: 333.71mm Outer Diameter Steel Sun Gear
The Caterpillar 256–7177: 333.71mm Outer Diameter Steel Sun Gear is a high speed sun gear used in the final drive system of 785 and 789 Caterpillar Haul Trucks
Part No. 256-7177:
Gear for use in planetary gear sets of final drives.
Material: Steel
External Spur Gear Number of Teeth: 48
Internal Spline Number of Teeth: 89
At Mining Parts Depot, our aftermarket Caterpillar gears are engineered for maximum system performance and long-term reliability. Each gear is precisely manufactured to meet exact specifications, ensuring seamless compatibility with both our aftermarket components and Caterpillar OEM parts. Crafted from premium-grade steel and treated with advanced heat-hardening processes, our gears deliver exceptional durability, withstand the toughest mining conditions, and help you achieve peak efficiency in every operation.
Material Description: Premium-Grade Steel
Outside Diameter: 13.130 in (333.71mm)
Inside Diameter: 5.500 in (139.7mm)
Width: 3.406 in (86.512mm)
- Caterpillar 785, 785C, 785D, 785G
- Caterpillar 789, 789B, 789C, 789D, 789G
Caterpillar part number 256-7177 supersedes part numbers 8W-3047 and 188-0654
Additional information
| Make | Caterpillar |
|---|---|
| Model | 785, 789 |
