VOLVO 1182-00671 EC360 50L Track Link Assy/Heavy duty crawler/track/chassis component source factory and manufacturer-HANGONG/DPW PARTS
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Product Specifications
Technical Data Sheet: Heavy-Duty Track Link Assembly for Volvo EC360 Excavators
Document Identifier: VOLVO-EC360-50L-Track-Link-Assy-HANGONG
Classification: Undercarriage Component | Track Chain | Final Drive Interface
1. Executive Summary & Component Overview
This document provides a complete technical elaboration of the Track Link Assembly (commonly referred to as a "Track Chain" or "Shoe Assembly"), a fundamental and high-wear component for the Volvo EC360 crawler excavator. This assembly forms the continuous, articulated belt that transmits the machine's engine power to the ground, providing mobility and stability. The part number 1182-00671 and the designation 50L (indicating a 50-link track count) specify this exact configuration. As a high-performance aftermarket solution, manufacturers like HANGONG ( DPW PARTS) engineer these assemblies to endure the severe impact and abrasion encountered in construction, demolition, and quarry applications, offering a reliable and cost-efficient alternative to OEM parts.
2. Primary Function & Operational Role within the Crawler System
The Track Link Assembly is the backbone of the excavator's undercarriage, with several critical functions:
Power Transmission & Traction: It directly engages with the sprocket's teeth, converting rotary motion from the final drive into linear movement, thereby propelling the machine.
Ground Pressure Distribution: The assembly, in conjunction with the track shoes, distributes the machine's massive weight over a large area, achieving a low ground pressure and preventing the machine from sinking into soft terrain.
Structural Integrity: It forms a continuous, high-strength loop that connects and aligns all other undercarriage components, including the rollers, idlers, and sprockets.
Load Bearing: It carries the machine's load and transmits it through the bottom rollers to the ground.
3. Detailed Technical Specifications & Engineering Design
3.1. Applicability & OEM Reference:
Primary Machine Model: Volvo EC360 Crawler Excavator.
OEM Part Number: 1182-00671.
Track Specification: The "50L" denotes a standard track chain consisting of 50 links per side, defining the machine's gauge and overall track length.
3.2. Mechanical Design & Construction:
Type: Sealed and Lubricated (S&L) Track Link.
Link Body (Side Rail): Fabricated from high-alloy steel through a precision forging process. This creates a dense, non-porous structure with superior tensile and impact strength compared to casting.
Bushing (Inner): A hardened steel bushing is pressed and secured into the link. This is the primary wear surface for sprocket engagement.
Track Pin (Outer): A hardened, high-carbon steel pin that connects adjacent links, allowing for articulation. The pin is the core of the link's hinge joint.
Track Shoe: Bolted to the link assembly, it provides traction and flotation. Shoes can be of various types (single-grouser, multi-grouser, rock, etc.) but are often specified separately.
3.3. Material Science & Metallurgy:
Link Material: Medium-Carbon Alloy Steel (35MnBh) is standard, providing an optimal balance of strength and toughness.
Bushing & Pin Material: High-Carbon, Chromium-rich Alloy Steel (e.g., 50CrMo4, 60CrMnB).
Heat Treatment:
Bushing: Undergoes Case Carburizing, resulting in an extremely hard outer surface (58-62 HRC) for sprocket engagement resistance, while maintaining a tough, ductile core to withstand shock loads.
Track Pin: Through-hardened or induction hardened to a core hardness of approximately 40-45 HRC, with a hardened surface of 55-60 HRC to resist bending and shear forces.
Link Body: Often normalized or quenched and tempered to achieve a uniform hardness and high structural integrity.
3.4. Sealing & Lubrication System (Critical for Service Life):
Sealing Technology: Utilizes a Floating Face Seal System. This consists of two precision-ground sealing rings (typically made of hardened steel or ceramic) that are forced together under spring pressure, creating a dynamic seal.
Seal Function: This system creates a sealed chamber between the link and the bushing, retaining lubricant and excluding abrasive contaminants (silica, clay, water). The longevity of the entire undercarriage is directly tied to the integrity of these seals.
Lubrication: The pin/bushing interface is pre-lubricated with a high-temperature, extreme-pressure (EP) grease, which reduces internal friction and wear, significantly extending the "pitch elongation" life of the chain.
4. Manufacturing Process & Quality Assurance at HANGONG (DPW PARTS)
As a specialized undercarriage manufacturer, HANGONG employs a rigorous production protocol:
Forging: High-quality steel billets are heated and forged into link blanks, ensuring superior grain flow and mechanical properties.
Machining: CNC centers drill the pin and bushing holes to precise tolerances, ensuring proper link pitch and smooth articulation.
Heat Treatment: Components undergo controlled furnaces for carburizing, hardening, and tempering, with strict temperature and atmosphere control.
Assembly & Sealing: Pins and bushings are pressed into the links with high interference fits. The floating seals are installed in a clean environment to prevent contamination.
Quality Control (QC):
Dimensional Inspection: CMM verification of link pitch, hole diameters, and overall geometry.
Hardness Testing: Rockwell and Brinell tests on pins, bushings, and links.
Material Certification: Traceable mill certificates for all raw materials.
Performance Testing: Sample assemblies undergo fatigue and load testing to validate design and manufacturing quality.
5. Sourcing and Supply Chain Context
Manufacturer Identification: HANGONG is a recognized manufacturer in the heavy machinery aftermarket parts sector. The brand DPW PARTS is likely their trading name or a dedicated distribution channel for international sales. They specialize in producing undercarriage components with a focus on meeting the dimensional and performance standards of major OEMs like Volvo.
Value Proposition: Sourcing this Track Link Assembly from a factory like HANGONG provides a Value-Engineered Alternative. It offers a direct replacement that balances performance, durability, and total cost of ownership, making it a prudent choice for fleet managers and equipment owners seeking to control maintenance expenses without compromising on machine availability or performance.
6. Key Technical Advantages Summary
Extended Service Life: Carburized and hardened bushings and pins provide superior resistance to wear and pitch elongation.
Superior Sealing: The floating face seal system offers the best available defense against abrasive contamination, which is the primary cause of premature undercarriage failure.
High Structural Integrity: Forged links provide exceptional strength-to-weight ratio and impact resistance, reducing the risk of cracking under high-stress conditions.
Precision Fit and Performance: CNC machining ensures correct pitch and alignment, leading to smooth sprocket engagement, reduced vibration, and lower stress on the final drive.
Proven Reliability: Manufactured under a certified quality management system, ensuring consistent performance and reliability batch after batch.
