39Q6-42310 R220-9VS Gear Sun Description
The YNF17469 39Q6-42310 Gear Sun is a key component used in compatible R220-9VS excavator planetary reduction systems. As the central gear element inside the reduction assembly, the sun gear transfers torque to the surrounding planetary gears, helping achieve efficient power transmission and stable machine movement.
Manufactured from high-strength alloy steel with precision gear machining and heat treatment, this sun gear provides excellent tooth strength, wear resistance, and dimensional accuracy. It is designed to withstand heavy loads, repeated impact, and continuous operation in demanding excavator working conditions.
The 39Q6-42310 sun gear is an ideal replacement component for worn, damaged, or failed reduction gearbox gears during excavator repair and overhaul. Replacing the worn gear helps restore smooth rotation, reliable torque output, and improved equipment performance.
39Q6-42310 R220-9VS Gear Sun Technical Data Sheet
| Parameter |
Specification |
| YNF Part Number |
YNF17469 |
| OEM Part Number |
39Q6-42310 |
| Machine Model |
R220-9VS |
| Product Name |
Gear Sun |
| Alternative Name |
Sun Gear / Planetary Gear |
| Product Type |
Reduction Gearbox Component |
| Function |
Torque Transmission |
| Installation Position |
Swing / Travel Reduction Gearbox |
| Material |
High-Strength Alloy Steel |
| Manufacturing Process |
Precision Gear Machining |
| Application |
Excavator Reduction System |
| Quality Type |
Aftermarket Replacement |
| Condition |
New |
| Brand |
YNF |
| Origin |
China |
| MOQ |
1 Piece |
| Shipping Method |
Air, Sea, Express |
| Payment Terms |
T/T, PayPal, Western Union |
39Q6-42310 R220-9VS Gear Sun Applications
| Application |
Description |
| Hyundai R220-9VS Excavator |
Sun gear replacement |
| Swing Reduction Gearbox |
Transfers torque inside planetary system |
| Travel Reduction System |
Supports excavator movement transmission |
| Final Drive Repair |
Replaces worn internal gear components |
| Excavator Overhaul |
Used for gearbox rebuilding and maintenance |
| Construction Machinery |
Suitable for heavy-duty operation |
39Q6-42310 R220-9VS Gear Sun Detail Display
The 39Q6-42310 R220-9VS Gear Sun is a planetary reduction gearbox component that transfers torque between the input shaft and planetary gears.
A worn sun gear may cause abnormal noise, reduced travel or swing performance, and unstable power transmission. Replacing the gear helps restore reliable gearbox operation.
FAQ
Q: Which excavator is this sun gear used for?
A: It is designed for compatible R220-9VS excavator reduction systems.
Q: What is the function of a sun gear?
A: It transfers torque inside the planetary reduction gear assembly.
Q: Is this a new replacement part?
A: Yes. It is a new aftermarket replacement gear sun.
