3063956 Final Drive Planetary Gear for Hitachi EX200-3 EX200-5 EX200LC-5

3063956 Final Drive Planetary Gear

The 3063956 planetary gear is a replacement gear used inside the planetary reduction section of an excavator final drive and travel gearbox.

It rotates within the planetary gear set and helps transfer rotational force through the reduction system, allowing the travel gearbox to reduce speed and increase output torque.

Accurate tooth geometry, stable gear support and correct alignment are important for smooth power transmission and reliable final drive operation.

Function in the Travel Reduction Gearbox

The planetary gear operates between the central drive gear and the surrounding gear structure inside the travel reduction system. During excavator travel, it rotates as part of the planetary gear set and transfers torque through the gearbox.

Because the gear is subjected to repeated load and continuous tooth contact, wear on the gear teeth or internal bore can affect alignment, gear engagement and overall travel performance.

The planetary gear should be inspected when symptoms such as the following are found:

• Abnormal grinding or knocking noise from the final drive

• Visible tooth wear, chipping or surface pitting

• Metal particles in the final drive oil

• Excessive backlash inside the planetary gear system

• Abnormal wear inside the gear bore

• Weak or unstable travel performance

If abnormal wear or gear damage is found, the surrounding planetary reduction components should also be inspected before the gearbox is reassembled.

What to Check Before Replacement

Before installing a replacement planetary gear, inspect the original component for cracked or chipped teeth, surface pitting, uneven wear and abnormal contact patterns.

The internal bore and gear support surfaces should also be checked for excessive wear or deformation that could affect correct rotation and alignment.

The condition of the final drive oil should be checked at the same time, particularly when metal contamination or unusual mechanical noise was present before disassembly.

Ordering and Fitment Verification

To help confirm the correct planetary gear before ordering, please provide one or more of the following:

• Excavator brand and model

• Machine serial number

• Original part information

• Final drive or travel device information

• Clear photos of the original gear

• Outer diameter, bore size, overall width and tooth count when available

Comparing the original gear and confirming the travel device configuration before ordering helps reduce the risk of selecting an incorrect replacement component.

Why Source Final Drive Gears from Topvelsun

Topvelsun supplies replacement excavator final drive, travel motor and planetary reduction components for major construction equipment applications.

We can assist with machine application verification and component matching to help customers select the correct replacement gear for final drive repair and maintenance.

Send us part number 3063956 together with your excavator information to request availability and quotation.