LIUGONG 51C0306 CLG950/CLG948/CLG956 Track Roller AS/Support Roller Assy/OEM quality chassis component supplier Quanzhou China
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Product Specifications
Technical Data Sheet: LIUGONG CLG950/CLG948/CLG956 Track Roller Assembly (P/N 51C0306)
Meta Description: OEM-quality manufacturer in Quanzhou supplying LIUGONG CLG950/CLG948/CLG956 Track Roller Assembly (P/N 51C0306). We produce durable, precision-engineered support rollers using advanced forging and sealing technology for optimal performance.
1. Product Identification & Functional Overview
OEM Part Number: 51C0306
Compatible Models: LiuGong CLG950, CLG948, CLG956 Track excavator (and other compatible models within this series).
Component Name: Track Roller Assembly (Also known as Support Roller or Bottom Roller)
Supplier Profile: A specialized OEM-quality chassis component manufacturer and supplier based in the industrial hub of Quanzhou, China.
The Track Roller Assembly is a vital component within the undercarriage system of a crawler loader. Positioned on the lower track frame, it performs several critical functions:
Primary Load Support: It bears a significant portion of the machine's operating weight, distributing the load evenly along the bottom span of the track chain. This ensures ground stability and prevents excessive sinkage, especially important during heavy lifting and loading operations.
Track Chain Guidance: The dual flanges on the roller act as guides, maintaining the lateral alignment of the track chain. This prevents derailment during travel and high-torque turning maneuvers, which are common in loader applications.
Friction Reduction: By providing a smooth, hardened, and rotating surface, it minimizes the rolling resistance between the track chain and the undercarriage, leading to more efficient power transmission and reduced overall wear.
2. Technical Specifications & Engineering Design
Our manufacturing process in Quanzhou is tailored to produce components that meet or exceed the original LiuGong performance specifications, ensuring reliability in demanding working conditions.
Material & Forging:
Roller Wheel: Fabricated from high-carbon 55Mn or 60Si2Mn steel via precision die-forging. This forging process creates a superior grain structure that enhances impact strength and fatigue resistance, crucial for withstanding the shock loads encountered in rock and debris-filled environments.
Shaft & Bushings: The central shaft is machined from high-strength alloy steel (40Cr or 42CrMo), heat-treated for core toughness. Internal bushings are made from wear-resistant sintered bronze or duplex metal to provide a durable, low-friction bearing surface.
Advanced Heat Treatment:
Core Toughness (Quenching & Tempering): The entire component undergoes a controlled Q&T process to achieve a tough and ductile core structure (approx. 30-40 HRC). This allows the roller to absorb impact loads without cracking.
Surface Hardness (Induction Hardening): The critical wear surfaces—the rolling path and the guide flanges—are induction hardened to a depth of 5-8mm, achieving a high surface hardness of 58-62 HRC. This provides exceptional resistance to abrasive wear from sand, gravel, and other materials.
Robust Sealing System:
The service life of the roller is largely determined by its seal integrity. We utilize a multi-stage, heavy-duty sealing system:Primary Seal: A spring-loaded, wear-resistant Nitrile (NBR) lip seal that provides the main barrier against contaminants.
Labyrinth Seal: A multi-path mechanical seal designed to create a tortuous path that effectively traps and expels abrasive particles like mud and dust before they reach the primary seal.
Grease Barrier: The seal cavity is packed with high-temperature, waterproof lithium-complex grease, creating a positive pressure barrier that actively repels contaminant ingress.
Lubrication: Designed as a sealed and lubricated-for-life assembly, the internal cavity is permanently lubricated during manufacture. A standard grease fitting is provided for maintaining the outer seal barrier.
3. Manufacturing Process & Quality Assurance in Quanzhou
Our factory in Quanzhou employs a rigorous, vertically integrated production and quality control protocol, leveraging the region's strong manufacturing supply chain.
Production Workflow: Raw Material Certification → Die Forging → Rough Machining → Quenching & Tempering → Induction Hardening → Precision CNC Finish Machining → Seal & Bearing Assembly → Performance Testing → Painting & Packaging.
Stringent Quality Control:
Dimensional Inspection: 100% verification using precision gauges and CMM (Coordinate Measuring Machines) to ensure perfect OEM fit and interchangeability.
Hardness Verification: Rockwell and Brinell testing on both core and wear surfaces to validate heat treatment specifications.
Non-Destructive Testing (NDT): Magnetic Particle Inspection (MPI) is used to detect any subsurface flaws in the forged components.
Rotational Torque Test: Each assembled roller is tested for smooth rotation and correct rotational torque.
Seal Leakage Test: A pressure decay test validates the integrity of the entire sealing system.
4. Common Failure Modes & Durability Advantages
Using our OEM-quality rollers prevents common and costly failure modes:
Premature Flange Wear: Prevented by deep induction hardening.
Seal Failure & Bearing Contamination: Mitigated by the advanced multi-stage labyrinth seal design.
Roller Seizure: Avoided through precise internal tolerances and effective sealing.
Core Cracking: Prevented by the forged construction and proper core toughness from Q&T heat treatment.
5. Our Quanzhou-Based Factory: Your Reliable Chassis Component Source
As a manufacturer based in Quanzhou, we offer distinct advantages:
OEM Equivalency: Parts are engineered to precisely match LiuGong OEM geometry, material, and performance standards.
Integrated Manufacturing Hub: Located in a key industrial region, we have excellent access to material and logistics networks, ensuring cost-effectiveness and supply stability.
Proven Durability: Components are tested to deliver service life comparable to original parts.
Global Export Capability: We have extensive experience in serving international markets, ensuring reliable logistics and timely delivery to customers worldwide.
