290-4125 GEAR-SUN is a Caterpillar final drive sun gear designed for CAT 793C, 793D and 793F off-highway trucks. Made from steel and engineered for application-specific drivetrain performance, it features 24 external spur gear teeth and 57 internal spline teeth for reliable engagement with mating components. Its heavy-duty construction makes it suitable for high-torque final drive systems operating in demanding mining and earthmoving environments.
| Item | Specification |
|---|---|
| Product Name | GEAR-SUN / Sun Gear |
| Part Number | 290-4125 |
| Brand | Caterpillar (CAT) |
| Machine Model | CAT 793D / 793C / 793F |
| Weight | 28.9 kg |
| Material | Steel / Alloy Mixed: Metal, Low Alloy Steel |
| Condition | Brand New – Genuine |
| Warranty | 6 Months |
| Packaging | Standard Export Carton |
| Availability | Generally in stock |
| Origin | China |
The 290-4125 GEAR-SUN is listed by Caterpillar for:
Caterpillar also lists the part for selected 793-series Off-Highway Truck configurations. Machine configuration and serial number should be verified before ordering.
The 290-4125 Sun Gear is suitable for heavy equipment operating in:
It is primarily used within final drive planetary gear systems on large Caterpillar off-highway trucks, where reliable torque transmission and gear durability are essential.
YLCM PARTS supplies Caterpillar, Komatsu, Hitachi and other construction and mining machinery parts. For 290-4125, our team can assist with part-number verification, machine compatibility, quotation, availability and international logistics.
The 290-4125 GEAR-SUN is professionally packed for international transportation.
Packaging can include:
The gear is securely protected to minimize the risk of impact, contamination, corrosion and handling damage during shipment.
YLCM provides flexible international logistics solutions:
The transportation method can be selected according to destination, order quantity, cargo requirements and delivery schedule.
Looking for 290-4125 GEAR-SUN for CAT 793D, 793C or 793F?
Contact YLCM PARTS for the latest quotation, stock status, lead time, packaging and shipping options. Send us your machine model, serial number and required quantity, and our technical team can help verify the correct final drive gear before ordering.
Q1: What is 290-4125?
A: 290-4125 is a Caterpillar Sun Gear used in planetary gear sets of final drive systems.
Q2: Which CAT machines use 290-4125?
A: Caterpillar lists 793C, 793D and 793F, along with 793F CMD, 793F OEM and 793F XQ configurations.
Q3: What material is 290-4125 made from?
A: Cat identifies the component as steel; its detailed material information includes alloy mixed materials such as metal and low alloy steel.
Q4: How many teeth does the 290-4125 Sun Gear have?
A: Cat specifies 24 external spur gear teeth and 57 internal spline teeth.
Q5: What does a sun gear do in a planetary final drive?
A: The sun gear is a central gear in the planetary system and works with planetary gears to transmit torque through the final drive.
Q6: How can I confirm compatibility?
A: Provide your machine serial number (PIN), arrangement number or original part number. YLCM can help verify the correct application.
Q7: Is 290-4125 suitable for mining applications?
A: Yes. Its listed applications include Caterpillar 793-series off-highway trucks used for heavy-duty hauling and mining operations.
Q8: Can YLCM supply other CAT final drive gears?
A: Yes. YLCM can supply sun gears, planet gears, ring gears, carriers, hubs, bearings and other final drive components.
