KOMATSU 2073000510 2073000511 KM1429 PC300 PC360 Track Roller Assy Heavy-duty crawler excavator chassis components supplier & manufacturer-HELI (cqctrack)

Professional supplier & manufacturer of heavy-duty crawler excavator chassis components. High-precision replacement Track Roller Assembly compatible with KOMATSU PC300, PC360 models. Parts 2073000510, 2073000511, KM1429. Durable construction for demanding applications.

1. Component Overview & Application
This product is a precision-engineered Track Roller Assembly, a critical load-bearing component within the crawler excavator undercarriage system. Specifically designed as a direct replacement for original equipment, it ensures optimal machine weight distribution, smooth track chain travel, and sustained structural integrity under high dynamic loads and harsh operating environments. Its primary application is for mid-to-large size hydraulic excavators, notably the KOMATSU PC300-7, PC300-8, PC360-7, and PC360-8 model series, which are widely utilized in mining, quarrying, heavy construction, and earthmoving projects.

2. Technical Specifications & Interchangeability

• OEM Part Number Cross-Reference: This assembly is a functional equivalent to KOMATSU part numbers 2073000510 and 2073000511. It is also identified under the legacy reference KM1429, ensuring accurate identification across parts databases and technical documentation.
• Compatible Machine Models: Primarily engineered for the KOMATSU PC300 and PC360 excavator series. Comprehensive compatibility should always be verified against the machine’s specific serial number range and existing undercarriage configuration.
• Design Type: Heavy-Duty (HD) or X-HD Configuration. This indicates enhanced specifications over standard-duty rollers, featuring reinforced dimensions, superior material grades, and advanced hardening processes to combat accelerated wear in abrasive or high-impact conditions.
• Core Function: Acts as a rotating sleeve bearing, supporting the excavator’s operational weight while guiding the track chain. It minimizes ground contact friction and facilitates efficient power transfer from the sprocket to the track link assembly.

3. Manufacturing & Quality Engineering
As a specialized undercarriage components manufacturer, HELI (operating under the industrial brand cqctrack) adheres to stringent production protocols to guarantee component reliability and longevity.

• Material Science: Rollers are forged or fabricated from high-carbon, alloy steel (e.g., 50Mn, 60Si2Mn) known for its exceptional yield strength and toughness. The material composition is meticulously controlled to meet original performance benchmarks.
• Precision Machining: Components undergo CNC machining to achieve exacting tolerances on critical surfaces: the outer diameter (O.D.) tread, the inner bore, and sealing interface grooves. This precision ensures perfect fitment with the track chain links and the undercarriage bogie frame.
• Heat Treatment & Surface Hardening: The core of durability lies in advanced metallurgy. The roller tread undergoes induction hardening or case carburizing processes, creating a deep, wear-resistant surface layer (typically 55-60 HRC) while maintaining a ductile, shock-absorbing core to prevent brittle fracture.
• Integrated Sealing Technology: A critical sub-assembly is the multi-layered seal system (often a combination of radial seals, O-rings, and dust lips). This labyrinth seal or float seal configuration provides a robust barrier against contamination (abrasive sand, mud, dust) and retains high-performance grease, significantly extending service life and re-lubrication intervals.
• Bearing & Bushings: Internal friction is managed by high-capacity tapered roller bearings or sealed spherical bushings, designed to handle substantial radial loads with minimal rotational resistance.

4. Quality Assurance & Compliance
Production is governed by a Quality Management System (QMS) aligned with international standards (e.g., ISO 9001). Each batch undergoes rigorous inspection, including:

• Dimensional verification via coordinate measuring machines (CMM).
• Hardness depth and profile testing.
• Pressure testing of the sealed chamber.
• Performance validation in simulated load conditions.

5. Supplier Profile: HELI (cqctrack)
HELI, through its dedicated undercarriage division cqctrack, operates as a direct manufacturer and supplier of complete crawler chassis solutions. The focus extends beyond track rollers to a full range of ”wear parts” and ”rolling components”, including:

• Bottom Rollers (Track Rollers)
• Top Rollers (Carrier Rollers)
• Sprockets (Final Drive Sprocket Rims)
• Idlers (Front Idler Wheels)
• Track Chains & Link Assemblies
• Track Shoes (Pads)

Their expertise lies in reverse-engineering and manufacturing aftermarket parts that meet or exceed original equipment performance, offering a cost-effective and reliable alternative for global fleet managers and parts distributors. The ”cqctrack” branding signifies specialization in the crawler track system domain, emphasizing technical proficiency and product durability.

Conclusion
The Track Roller Assembly (P/N: 2073000510, 2073000511, KM1429) for KOMATSU PC300/PC360 excavators represents a critical engineered component where material quality, precision manufacturing, and robust sealing converge. For entities requiring a reliable supply chain for heavy-duty undercarriage components, partnering with a technical manufacturer like HELI(cqctrack) provides access to products built for performance, backed by integrated production control from forging to final assembly.