CLG985 Track Roller Assembly/14C0288C1/LiuGong Heavy-duty excavator undercarriage components/OEM manufacture and factory

Product Specifications

Professional Technical Description: LiuGong CLG985 Track Roller Assembly

(14C0288C1)LiuGong CLG985 Track Roller Assembly | OEM-Compatible Replacement Part Image:

Introduction:
The Track Roller Assembly is a critical component within the undercarriage system of the LiuGong CLG985 excavator. Its primary function is to support the machine's immense weight, guide the track chain, and absorb dynamic shocks and loads during operation. This article provides a detailed, technical exposition of its structure, materials, and engineering specifications, designed for procurement managers, heavy equipment mechanics, and parts distributors.

1. Primary Function and Operational Role
The Track Roller Assembly on the LiuGong CLG985 serves a dual purpose:

• Load Bearing: It directly bears the weight of the excavator, transferring the ground pressure from the mainframe through the track link and onto the ground.

• Guidance and Stability: It ensures the smooth travel of the track chain along its designated path, maintaining alignment and providing stability during straight-line travel and turns.

2. Detailed Structural Composition & Components
A single LiuGong CLG985 Track Roller Assembly is not a monolithic part but a precision-engineered system comprising several key sub-components:

• Outer Rim (Wheel Body): Manufactured from high-carbon, high-chromium alloy steel (e.g., SCr440, SAE 1045/1050). This hardened outer surface is designed for maximum resistance to abrasion, impact, and pitting. It features a precisely machined profile that interfaces perfectly with the track chain bushings.

• Sealed Spherical Roller Bearing: The heart of the assembly. This specialized bearing is designed to handle extreme radial loads and accommodate minor misalignments. It is pre-lubricated and sealed with a multi-lip, labyrinth-style seal to prevent the ingress of abrasive contaminants (dust, mud, silt) and the egress of lubricating grease, even under high-pressure washdowns.

• Main Axle (Shaft): A hardened and tempered medium-carbon steel shaft (e.g., 42CrMo). This shaft provides the structural core onto which the roller and bearings are pressed. It is engineered to resist bending moments and shear forces.

• End Caps and Sealing System: Comprises Buna-N or Viton rubber seals retained by sturdy metal caps. This system creates a hermetic barrier, which is critical for the IP69K-rated sealing performance, ensuring long-term lubrication and preventing premature failure.

• Mounting Bracket (Boss): The integral interface that connects the entire roller assembly to the excavator's main undercarriage frame via high-strength bolts.

3. Material Science and Manufacturing Processes

• Forging: Key components like the wheel body are often forged rather than cast. Forging aligns the grain structure of the metal, resulting in superior strength, toughness, and impact resistance compared to casting.

• Heat Treatment: Critical wear surfaces undergo controlled induction hardening and tempering processes. This creates an extremely hard, wear-resistant exterior surface (typically 55-60 HRC) while maintaining a tough, shock-absorbent core.

• Machining: All components are CNC-machined to exacting tolerances (ISO 286-2) to ensure perfect concentricity, balance, and fitment, preventing uneven wear and excessive vibration.

• Surface Protection: To prevent rust and corrosion, components are treated with phosphate coating or similar pre-treatment before the application of a high-quality industrial paint.

4. Key Performance and Compatibility Data

• Compatibility: Designed as a direct OEM replacement for the LiuGong CLG985 excavator model. (Always cross-reference the specific machine's serial number for ultimate confirmation).

• Load Rating: Engineered to meet or exceed OEM specifications for dynamic and static load capacity, ensuring reliable performance under the CLG985's operating weight.

• Lubrication: Pre-filled with a high-temperature, high-pressure lithium complex EP grease designed for a wide operating temperature range (-30°C to +150°C).

5. Quality Assurance and Standards
Genuine and high-quality aftermarket LiuGong CLG985 Track Roller Assemblies are manufactured in compliance with international quality standards, including:

• ISO 9001: Quality Management Systems.

• ISO 6016: Earth-moving machinery - Test methods for measuring idler roller and track roller speeds.

• Dimensional checks against original blueprints.

• Performance testing for seal integrity, rotational torque, and run-out tolerance.

Conclusion and Value Proposition
The LiuGong CLG985 Track Roller Assembly is a quintessential example of robust industrial design. Understanding its intricate structure and the high-grade materials used in its construction is vital for making informed procurement decisions. Opting for quality-assured assemblies ensures maximum uptime, reduced long-term operating costs, and preserves the integrity of the entire undercarriage system.