XE900D 950DA Travel Gearbox Assembly for XCMG900Excavator Final Drive Reduction Gear Box Travel reduction Dearbox RX220R94 800380418

Torque multiplication​ – Significantly increases output torque from the travel motor.

Speed reduction​ – Converts high motor RPM into low-speed, high-torque sprocket rotation.

Final drive unit​ – The last reduction stage in the travel power train.

Sprocket drive​ – Directly engages and drives the track chain via the output sprocket.

Planetary gear sets​ – Uses compact, multi-stage planetary gears for high reduction ratios.

Load distribution​ – Evenly distributes massive track forces across multiple gears.

Axle function​ – Acts as the primary axle, supporting the machine's weight on the track frame.

Radial load support​ – Bearings support the weight of the machine through the tracks.

Axial load support​ – Withstands forces from turning and side slopes.

Impact absorption​ – Cushions shocks from uneven ground and obstacles.

Power transmission​ – Transmits hydraulic motor power to the track with minimal loss.

Compact design​ – Houses complex gearing in a space-saving package within the track frame.

High mechanical advantage​ – Enables a small motor to move a heavy machine.

Track tension maintenance​ – Provides a solid, fixed drive point for proper track tension.

Bogie wheel alignment​ – Helps maintain the track frame and roller alignment.

Sealed lubrication system​ – Contains oil for permanent gear and bearing lubrication.

Heat dissipation​ – Metal housing transfers gear friction heat to the environment.

Contaminant exclusion​ – Seals keep dirt, water, and debris out of the gear train.

Braking surface​ – Often provides the rotating surface for the travel parking brake.

Mounting platform​ – Serves as the mounting point for the travel motor and track frame.

Torque reaction handling​ – Anchors the motor's reaction torque to the track frame.

Swing bearing clearance​ – Maintains proper clearance for the upper structure swing bearing.

Ground clearance determination​ – Its vertical position affects the machine's overall ground clearance.

Track alignment​ – Ensures the sprocket correctly aligns with the track chain and rollers.

Noise reduction​ – Precision gearing reduces operational noise from the drive system.

Vibration dampening​ – Reduces vibration transmitted from the tracks to the main frame.

Efficiency optimization​ – High-quality gearing ensures efficient power transfer.

Service life extension​ – Protects the high-speed, lower-torque travel motor from direct load.

Traction control​ – Fundamental component in delivering usable tractive effort to the ground.

Gradability enablement​ – Provides the necessary torque to climb steep slopes.

Counter-rotation capability​ – Allows independent track control for zero-radius turns.

Immobilization function​ – When locked via its brake, it securely holds the machine in place.

Speed matching​ – Ensures both left and right tracks receive appropriately reduced speed for straight travel.

Bearing preload maintenance​ – Maintains proper bearing preload for long component life.

Lubrication supply​ – Oil reservoir lubricates gears and bearings continuously.

Debris shedding​ – Housing design helps shed mud and rocks to prevent packing.

Structural integrity​ – Adds rigidity and strength to the track side frame.

Weight distribution​ – Contributes to the machine's lower weight distribution for stability.

Protective function​ – Shields internal gears and the motor shaft from external damage.