Crawler Excavator 9251681 4636857 9219274 Final Drive For Hitachi ZX1000K-3 ZX850-3 ZX850LC-3-DH ZX870H-3 Travel Motor Assy

Crawler excavator 9251681 4636857 9219274 final drive for hitachi ZX1000K-3 ZX850-3 ZX850LC-3-DH ZX870H-3 travel motor assy

The excavator travel motor assembly is a critical component of the machine’s chassis system, responsible for supporting the entire weight and providing mobility. It typically consists of tracks, sprockets, idlers, rollers (carrier and track), and travel motors. The design of the undercarriage directly impacts the excavator’s stability, traction, and operational efficiency. A high-quality undercarriage ensures smooth movement across rough terrain, minimizes slippage and wear, and offers excellent durability for demanding applications in mining, construction, and agriculture.

Belparts (GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED), is a foreign trade company integrating development, sales, procurement, warehousing, transportation and service. Founded in September 2013, we have more than twelve years of experience in machinery trade.

The excavator undercarriage is a critical component responsible for supporting and propelling the entire machine, ensuring stable operation across various terrains. Its primary functions include providing power, supporting the machine’s frame, transmitting driving force, and ensuring mobility and stability in complex environments.

Main Components

The undercarriage consists of the following key parts:

• Travel Motor (Hydraulic Motor): Supplies driving force by converting hydraulic energy into mechanical energy to rotate the tracks.

• Track (Crawler Belt): Directly contacts the ground, providing traction and stability. Typically made of high-strength steel to adapt to different terrains.

• Sprocket (Drive Wheel): Connects the travel motor to the track, transmitting power to move the track.

• Idler Wheel (Guide Wheel): Guides the track’s movement and maintains proper alignment, usually located at the front.

• Carrier Rollers (Bottom Rollers): Support the machine’s weight and distribute pressure evenly to reduce ground impact.

• Track Rollers (Top Rollers): Support the upper part of the track, preventing sagging and ensuring smooth operation.

• Track Frame (Undercarriage Frame): Supports and secures all components, ensuring structural stability.

Working Principle

The undercarriage is driven by the hydraulic system, which powers the travel motor to rotate the sprocket, propelling the track. The idler wheel and carrier rollers ensure proper track movement, while track rollers prevent sagging. The track frame maintains overall stability, allowing the excavator to move flexibly across rough terrain.

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