SANY SSY006803487 SY415 Track Lower Roller Assembly – China undercarriage parts source manufacturer&supplier–HELI(cqctrack)

Technical Specification: SANY SSY006803487 SY415 Track Lower Roller Assembly – Source Manufacturer & Supplier: HELI (CQCTRACK)

1. Component Identification & System Role

The Track Lower Roller Assembly (OEM Part Number: SSY006803487) is a fundamental load-supporting component within the undercarriage system of the SANY SY415 medium-to-heavy-duty crawler excavator. Manufactured and supplied by HELI (CQCTRACK) as a direct-fit replacement part, this assembly—commonly termed a bottom roller or track roller—is installed directly onto the track frame. Its primary function is to bear the operational weight of the machine and facilitate the smooth, guided travel of the track chain over the frame’s lower strand, a critical role in ensuring machine stability, mobility, and overall undercarriage efficiency.

2. Primary Function & Operational Dynamics

In the SY415′s undercarriage system, the lower roller assembly performs several essential duties:

• Direct Load Support: Carries the radial load of the excavator’s weight, distributing ground reaction forces evenly across multiple rollers along the track frame to minimize ground pressure and structural stress.
• Track Chain Guidance: The dual, integrated flanges guide the track chain’s link pads, maintaining lateral alignment and preventing derailment during straight travel and counter-rotation.
• Impact and Vibration Absorption: Acts as a primary damper, absorbing shocks and vibrations transmitted from uneven terrain through the track chain, thereby enhancing operator comfort and protecting the integrity of the track frame and final drives.
• Contaminant Exclusion: Its sealing system is engineered to operate reliably in typical excavator environments (mud, sand, dust), protecting the internal bearing system from abrasive wear and premature failure.

3. Detailed Construction & Material Engineering

HELI (CQCTRACK) manufactures the SSY006803487 assembly to meet precise OEM dimensional and performance specifications, utilizing a robust construction methodology:

• Roller Body & Flanges:
  • Material: Fabricated from high-carbon alloy steel (e.g., 55Mn, 60Si2Mn) via forging or controlled casting to ensure optimal grain structure and strength.
  • Heat Treatment: The outer running surface and critical flange contact areas undergo induction hardening to achieve a high surface hardness (typically HRC 55-60) for superior wear resistance against the track chain bushings, while the core remains tough to withstand impact loads.
  • Machining: Precision CNC turning and grinding guarantee concentricity, accurate flange profile, and smooth sealing surfaces, ensuring consistent performance and seal integrity.
• Shaft & Bearing System:
  • Shaft: Manufactured from quenched and tempered medium-carbon steel. The bearing mounting journals are precision-ground and may be surface-treated for enhanced wear resistance.
  • Bearing Configuration: Employs sealed, pre-lubricated heavy-duty roller bearings (typically deep-groove ball bearings or tapered roller bearings). These are selected for their high radial load capacity and durability under the dynamic loads of the SY415.
  • Retention: The shaft is securely fixed within the roller body via press-fitting, locking collars, or end caps to prevent any relative movement.
• Integrated Sealing System:
  • Features a multi-component, labyrinth-type seal designed for the excavator’s service environment. This usually combines:
    1. A primary nitrile rubber (NBR) radial lip seal.
    2. An intermediate floating seal or O-ring.
    3. An external metal or polymer dust guard.
  • The seal cavity is filled with high-quality, high-temperature lithium-based grease to lubricate bearings and provide a barrier against contaminants.
• Lubrication: Includes a standard grease fitting (zerk) for routine maintenance and re-lubrication to extend service life.

4. Manufacturer Profile: HELI (CQCTRACK) as Source & Supplier

HELI, under its CQCTRACK brand, operates as a prominent integrated source manufacturer and global supplier for undercarriage components.

• Supply Chain Role: Provides components directly to aftermarket distributors, dealership networks, and large end-users, ensuring availability and competitive pricing.
• Manufacturing Philosophy: Focuses on value-engineered durability, balancing cost-effectiveness with reliable performance through controlled manufacturing processes and quality material selection.
• Production & Quality Assurance:
  • Process Control: Implements standardized machining, automated heat treatment, and assembly lines dedicated to high-volume production of rollers, idlers, and sprockets.
  • Quality Checks: Routine inspections include hardness testing, dimensional verification, and rotational torque checks to ensure each assembly meets functional specifications.
  • Compliance: Manufactures to ISO 9001 quality management standards, with components engineered to match or exceed OEM performance benchmarks.

5. Application, Service & Compatibility

• Primary Application: SANY SY415 Crawler Excavator.
• Interchangeability: A direct replacement for SANY part number SSY006803487. Verification of the machine’s serial number and existing component measurements is recommended prior to installation to confirm compatibility.
• Wear Indicators & Maintenance:
  • Key wear parameters include reduction in roller outer diameter and thinning of guidance flanges. Regular measurement against service limits is crucial.
  • Visual inspection for grease leakage, irregular wear patterns, or difficulty in rotation can signal seal or bearing failure.
  • Adherence to scheduled lubrication intervals is vital for maximizing component life.
• System-Wide Consideration: For optimal undercarriage performance and economy, the condition of the lower rollers should be assessed alongside the track chain, sprocket, idler, and carrier rollers. Replacing rollers in sets (per side) and in coordination with other worn components is considered best practice to prevent accelerated wear.

6. Conclusion

The SANY SSY006803487 SY415 Track Lower Roller Assembly from HELI (CQCTRACK) exemplifies a core undercarriage component designed for reliable service in demanding construction applications. As both the source manufacturer and a global supplier, HELI delivers a product that combines OEM-level fit and function with the accessibility and value of the aftermarket. Its construction, centered on wear-resistant materials, effective sealing, and a robust bearing system, provides equipment owners and maintenance managers with a dependable solution for sustaining the productivity and longevity of the SANY SY415 excavator’s undercarriage system, contributing directly to reduced downtime and lower total operating costs.