1020184 Final Drive Ring Gear for HITACHI EX200-5 EX210H-5

1020184 Final Drive Ring Gear

The 1020184 ring gear is a replacement component used inside the excavator final drive and travel reduction gearbox. Its internal gear teeth engage with the planetary gear system to transfer rotational force through the reduction stages.

The ring gear plays an important role in reducing rotational speed and increasing output torque before power is transmitted to the excavator tracks.

Accurate tooth geometry, stable mounting surfaces and correct alignment are important for smooth gear engagement and reliable travel system operation.

Compatible Excavator Applications

This final drive ring gear is used in selected Hitachi excavator travel device configurations, including:

• Hitachi EX200-5

• Hitachi EX210-5

Travel gearbox specifications can vary according to machine configuration, production period and serial number.

Before ordering, we recommend checking the original ring gear and confirming the machine and final drive configuration.

How the Final Drive Ring Gear Works

The ring gear forms part of the planetary reduction system inside the excavator final drive. During travel operation, the planetary gears rotate and engage with the internal teeth of the ring gear as power passes through the reduction stages.

This gear arrangement helps reduce rotational speed while increasing torque, allowing the travel system to move the excavator under load.

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

• Abnormal grinding or knocking noise from the final drive

• Visible wear or damage on the internal gear teeth

• Metal particles in the final drive oil

• Excessive backlash inside the travel gearbox

• Unstable or weak travel performance

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

Ordering and Fitment Verification

To help confirm the correct final drive ring gear, please provide one or more of the following:

• Excavator brand and model

• Machine serial number

• Original part information

• Final drive or travel device model

• Photos of the original ring gear

• Outer diameter, mounting hole quantity and internal tooth specifications when available

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

Why Source Final Drive Parts from Topvelsun

Topvelsun supplies replacement excavator final drive, travel motor and reduction gearbox components for Hitachi and other major construction equipment brands.

We can assist with machine application verification and travel system component matching to help customers select the correct replacement part for repair and maintenance.

Send us part number 1020184 together with your excavator model or serial number to request availability and quotation.