LIUGONG 51C0306 CLG952 Track Bottom Roller Assy–Heavy duty excavator chassis components source OEM ODM manufacturer&supplier–HELI(cqctrack)-based in quanzhou China

The LIUGONG 51C0306 CLG952 Track Bottom Roller Assembly is a heavy-duty excavator chassis component engineered for maximum service life in demanding conditions. Manufactured by HELI (CQCTRACK), a professional OEM & ODM manufacturer and supplier based in Quanzhou, China, this roller assembly features a forged steel body, induction hardened raceway, and a premium sealed bearing system to deliver exceptional wear resistance and seal integrity. As a direct replacement for the original part, it ensures optimal performance for the LIUGONG CLG952 excavator’s undercarriage, reducing downtime and operating costs. HELI CQCTRACK specializes in high-quality track rollers, undercarriage parts, and excavator chassis components for the global aftermarket.

LIUGONG 51C0306 CLG952 Heavy-Duty Track Bottom Roller Assembly – Comprehensive Technical Overview

1. Product Identification & Host Machine Integration

• OEM Part Number: 51C0306
• Compatibility: Specifically engineered for the LIUGONG CLG952 model, a robust heavy-duty excavator. Guarantees perfect dimensional fit, load-bearing capacity, and operational interchangeability with the original component.
• Component Designation: Track Bottom Roller / Lower Roller Assembly (Assy). A critical undercarriage component that supports the machine’s weight, guides the track chain, and maintains track alignment and tension during travel and operation.

2. Technical Specifications & Engineering Design

• Function: Transfers the excavator’s gross weight to the track chain and onto the ground. It rolls along the track chain’s inner guide rails (links), reducing friction and facilitating smooth travel, especially over uneven terrain.
• Heavy-Duty Construction: Designed for severe applications in mining, quarrying, and large-scale earthmoving. Key features include:
  • Forged or Precision Cast Steel Hub/Flange: Provides superior grain structure and fatigue strength compared to standard castings.
  • High-Carbon Chromium Steel (e.g., GCr15) or Boron-Alloyed Steel Shaft: Delivers exceptional hardness, wear resistance, and core toughness to withstand high radial and impact loads.
  • Induction Hardened/Raceway: The outer running surface undergoes localized heat treatment (induction hardening) to achieve a deep, consistent hardness layer (typically 55-62 HRC) for maximum wear life, while retaining a ductile interior to prevent brittle fracture.
  • High-Capacity, Sealed Bearing System: Utilizes large-diameter tapered roller bearings or dual-row spherical roller bearings housed within a multi-labyrinth sealing chamber. This system is pre-lubricated with high-temperature, extreme-pressure (EP) lithium complex grease and features multiple lip seals and dust guards to exclude contaminants (mud, sand, water) and retain lubricant, ensuring long service intervals.
  • Full Welded or Bolted Housing: Robust final drive housing connection ensures structural integrity and prevents oil leakage.
  • Optional Flange Design: May include reinforced external flanges to protect the seal and bearing housing from direct side impacts with rocks and debris.

3. Manufacturing & Quality Assurance (OEM/ODM Capabilities)
As an OEM (Original Equipment Manufacturer) and ODM (Original Design Manufacturer), HELI (CQCTRACK) implements a vertically integrated production process:

• Material Sourcing: Strategic procurement of certified raw materials (steel alloys, bearing steel) from reputable mills.
• Advanced Machining: Utilizes CNC lathes, machining centers, and automated grinding lines to achieve micron-level tolerances for shaft diameters, bore sizes, and seal surfaces.
• Heat Treatment: Controlled atmosphere carburizing, quenching, and tempering furnaces, followed by precise induction hardening of raceways, ensure optimal metallurgical properties.
• Sealing Technology: Proprietary multi-stage sealing solutions are tested for waterproofing and dustproof performance under simulated extreme conditions.
• Assembly & Testing: Automated bearing pressing, precise torque-controlled fastening, and accurate grease filling. 100% final inspection includes dimensional checks, rotational torque testing, and seal integrity verification.
• Quality Certifications: Adherence to international standards such as ISO 9001:2015. Components are manufactured to meet or exceed original performance specifications, with material and hardness certificates traceable for each production batch.

4. Supplier Profile: HELI (CQCTRACK) – Quanzhou, China

• Corporate Identity: HELI, operating under the brand CQCTRACK, is a specialized manufacturer and global supplier of premium undercarriage components for excavators, bulldozers, and track loaders.
• Core Competence: Deep expertise in the R&D, forging, machining, and assembly of heavy-duty track rollers, idlers, sprockets, and track chains. The focus is on durability, reliability, and total cost of ownership for end-users.
• Location Advantage: Based in the industrial hub of Quanzhou, Fujian Province, China, the company benefits from a mature manufacturing ecosystem, efficient logistics infrastructure (including Quanzhou Port), and a skilled engineering workforce.
• Global Supply Chain Role: Serves as a trusted ODM partner for international distributors and a direct-to-market OEM supplier of replacement undercarriage parts. Capable of manufacturing according to supplied drawings (OEM) or providing complete design and engineering solutions (ODM).