E320B Gear 5I7686 Description
The YNF17771 gear (OEM 5I7686) is a key transmission component used in Caterpillar E320B and E320E excavator final drive systems. It plays an essential role in transferring torque within the planetary gearbox, ensuring smooth machine travel operation under high load conditions.
Manufactured from high-strength alloy steel and processed through precision CNC machining, the gear tooth profile is engineered for accurate meshing with mating components inside the travel reduction system. This improves transmission efficiency and reduces internal vibration during operation.
A controlled heat treatment process enhances surface hardness and wear resistance, allowing the gear to perform reliably in harsh working environments such as mining sites, construction projects, and continuous earthmoving operations. Strict dimensional inspection ensures consistent installation performance and long service life.
E320B E320E Gear 5I7686 Technical Data Sheet
| Item |
Specification |
| Product Name |
Final Drive Gear / Sun Gear |
| YNF Number |
YNF17771 |
| OEM Part No |
5I7686 |
| Teeth |
24T |
| Machine Model |
Caterpillar E320B / E320E |
| System Type |
Travel Final Drive Gearbox |
| Material |
Forged Alloy Steel |
| Hardness |
HRC 45–55 |
| Processing |
CNC Precision Machining |
| Installation Position |
Planetary Gear System |
| Brand |
YNF |
| MOQ |
1 Piece |
| Origin |
China |
| Shipping Method |
Air / Sea / Express |
| Payment Terms |
T/T, Western Union, PayPal |
E320B E320E Gear Applications
| Industry |
Application Scenario |
| Construction |
Excavator travel system maintenance |
| Mining |
Heavy-load earthmoving operations |
| Quarry |
Continuous rock excavation work |
| Infrastructure |
Road and foundation engineering |
| Repair Workshop |
Final drive gearbox rebuilding |
E320 Gear 24T Detail Display
The travel final drive gear is a critical part of the planetary gearbox system in excavators. It works with sun gears, planetary gears, and ring gears to transmit torque efficiently and ensure smooth machine movement.
Common issues include wear from insufficient lubrication, overload stress, and long-term fatigue. Regular inspection and timely replacement are essential for maintaining stable excavator performance.
YNF Machinery also supplies related E320 series travel gearbox components:
- Sun gear
- Planetary gear set
- Ring gear
- Carrier assembly
- Final drive housing parts
