EX300-5 Carrier Assembly Description
The YNF17560 planetary carrier assembly (OEM 1010474) is a key structural component in the first stage reduction system of the Hitachi EX300-5 travel final drive gearbox. It is designed to support planetary gears and maintain stable rotation balance under high torque conditions.
Manufactured from forged alloy steel and processed with high-precision machining, the carrier ensures accurate gear positioning for both 27-tooth and 28-tooth gear configurations. This guarantees smooth power transmission and reduces internal stress during operation.
The assembly is heat-treated to improve hardness and fatigue resistance, making it suitable for harsh working environments such as mining, quarrying, and heavy earthmoving operations. It is engineered to maintain stability even under continuous load, reducing gearbox failure risks and extending service intervals.
EX300-5 Planet Carrier 1010474 Technical Data Sheet
| Item |
Specification |
| Product Name |
Planet Carrier Assembly |
| YNF Number |
YNF17560 |
| OEM Part No |
1010474 |
| Gear Teeth |
27T / 28T System |
| Machine Model |
Hitachi EX300-5 |
| System Type |
Travel Final Drive (1st Stage) |
| Material |
Forged Alloy Steel |
| Hardness |
HRC 45–55 |
| Processing |
CNC Precision Machining |
| Function |
Planetary Gear Support Carrier |
| Installation Position |
Final Drive Gearbox |
| Brand |
YNF |
| MOQ |
1 Piece |
| Origin |
China |
| Shipping Method |
Air / Sea / Express |
| Payment Terms |
T/T, Western Union, PayPal |
EX300-5 Carrier Assembly Applications
| Industry |
Application Scenario |
| Construction |
Excavator travel system repair |
| Mining |
Heavy load digging operations |
| Quarry |
Continuous rock excavation |
| Infrastructure |
Road building machinery maintenance |
| Repair Workshop |
Final drive gearbox rebuilding |
EX300-5 Carrier Assembly Detail Display
The planetary carrier assembly is a core structural component in a travel final drive system. It holds planetary gears in position and distributes torque evenly within the gearbox.
In EX300-5 systems, failure of the carrier may lead to gear misalignment, abnormal noise, or complete travel system breakdown. Regular inspection and replacement are recommended in heavy-duty applications.
YNF Machinery also supplies related EX300-5 travel gearbox parts:
- Sun gear
- Planetary gear set
- Ring gear
- Carrier bolts and pins
- Final drive housing components
