KOMATSU 820220032 2033000110 2033000111 2033000140 20E30K1580 22B3000010 PC80 PC90 PC100 PC120 PC130 Mini excavator undercarriage parts source manufacturer and supplier / CQCTRACK

KOMATSU PC80-PC130 Series Track Roller Assembly—Mini Excavator Undercarriage Engineering Analysis from Heli CQCTRACK

Document Identifier: TWP-CQCT-KOMATSU-MINI-ROLLER-14
Issuing Body: Heli Machinery Manufacturing Co., Ltd. (CQCTRACK)
Target Models: KOMATSU PC80, PC90, PC100, PC120, PC130 Mini to Medium Crawler Excavators
Component Portfolio: 820220032, 2033000110, 2033000111, 2033000140, 20E30K1580, 22B3000010
Machine Weight Class: 1 – 13 tons (dependent on configuration and application)
Publication Date: March 2026
Classification: Technical Engineering Specification / Mini Excavator Undercarriage Parts Sourcing Guide

1. Executive Summary: Heli CQCTRACK as the Professional Source Manufacturer for KOMATSU Mini Excavator Undercarriage Components

In the precision-dependent realm of mini to medium crawler excavator operations (1-13 ton class), the track roller assembly—alternatively designated as the track bottom roller or lower roller—represents a primary load-bearing element within the undercarriage system. This component performs the essential function of supporting the full machine weight, distributing ground-bearing pressure evenly across the track chain, guiding the track chain smoothly along the undercarriage frame, reducing friction between the track links and the undercarriage structure, and absorbing shocks from uneven terrain to enhance machine stability and operator comfort . For the KOMATSU PC80, PC90, PC100, PC120, and PC130 platforms—versatile excavators widely deployed in urban construction, landscaping, utilities, infrastructure development, and light earthmoving applications—the track roller assembly stands as a mission-critical component determining machine stability, track alignment, and overall undercarriage longevity.

Heli Machinery (CQCTRACK) has established itself as a premier professional source manufacturer and supplier of undercarriage components for KOMATSU mini excavator applications. As a dedicated manufacturer, CQCTRACK operates within the broader HELI Group ecosystem, providing the necessary infrastructure, R&D capability, and quality management systems for manufacturing world-class undercarriage parts . This technical white paper provides a comprehensive engineering deconstruction of the KOMATSU 820220032, 2033000110, 2033000111, 2033000140, 20E30K1580, and 22B3000010 Track Roller Assemblies, specifically engineered for the PC80-PC130 series excavator platforms and their variants.

By integrating rigorous material science (utilizing high-grade alloys such as 50Mn, 40MnB, and 35MnB steels) , precision closed-die warm forging technologies with optimized grain flow , advanced heat treatment protocols achieving optimal hardness gradients (52-58 HRC surface with tough core, 8-12mm case depth) , multi-stage sealing architecture validated for contamination resistance, and ISO 9001:2015 certified manufacturing processes, Heli CQCTRACK delivers track roller assemblies that achieve documented performance parity with—and in specific metrics beyond—original equipment specifications.

For procurement specialists, fleet maintenance engineers, and equipment managers seeking to optimize total cost of ownership for their KOMATSU PC-series mini excavator fleets operating in professional construction and landscaping applications, this document serves as the definitive technical reference and sourcing guide.

2. Product Portfolio Identification and Cross-Reference Matrix

To ensure procurement accuracy and seamless integration into existing undercarriage systems, the following comprehensive identification matrix defines the complete component portfolio covered under this specification.

Table 1: Complete Part Number Interchangeability and Machine Application

Component Classification: Track Roller Assembly / Track Bottom Roller / Lower Roller / Under Roller
Target Machines: KOMATSU PC80, PC80-3, PC90, PC100 (all variants), PC120 (all variants), PC130 (all variants) Mini to Medium Crawler Excavators
Operating Weight Range: 1,000 kg – 13,000 kg (dependent on configuration and year of manufacture)
Primary Functions:

• Support the machine’s weight and distribute load evenly across the track chain
• Guide the track chain smoothly along the undercarriage frame
• Reduce friction between the track links and the undercarriage structure
• Absorb shocks from uneven terrain, enhancing stability and operator comfort
  Flange Configuration: Available in single-flange and double-flange configurations depending on position and machine specification
  Manufacturing Origin: Heli Machinery Manufacturing Co., Ltd. (Brand: CQCTRACK) – ISO 9001:2015 Certified Facility
  Engineering Intent: Professional-grade replacement components engineered for 1:1 mechanical interchangeability without modification

2.1 System Integration within Undercarriage Assembly

The Track Roller Assembly does not function as an isolated component but constitutes a critical load-bearing element within an integrated undercarriage system:

• Undercarriage Architecture: The track rollers are mounted to the track roller frame via shaft mounting brackets, positioned along the bottom of the undercarriage to support the machine weight and guide the track chain .
• Functional Context: These rollers carry the full operational weight of the excavator, distributing ground-bearing pressure and ensuring machine stability during excavation, lifting, and travel operations. Robust forged steel roller bodies and high-strength shafts are designed to support full machine weight and absorb dynamic impact loads .
• Flange Configuration: Depending on position within the undercarriage, rollers may be single-flange (mounted on outer positions) or double-flange (mounted on inner positions to provide lateral guidance).
• Mounting Configuration: The assembly features precision-machined mounting interfaces (shaft ends with bolt holes) that secure the roller to the track frame for direct-fit replacement built to OEM-style dimensions for fast bolt-on replacement using standard workshop tools .

3. Engineering Deconstruction: The Anatomy of Heli CQCTRACK KOMATSU PC80-PC130 Mini Excavator Track Roller Assemblies

The performance longevity of any track roller assembly operating in professional mini excavator applications is determined by the synergistic interaction of five critical engineering subsystems: the roller shell structure, shaft metallurgy, bearing system, sealing architecture, and lubrication regime . Heli CQCTRACK engineers each of these subsystems with precision appropriate for the 1-13 ton class excavator application in diverse operating conditions.

3.1 Roller Shell Structure: Forged Metallurgy for Professional Applications

The roller shell forms the core structural element of the assembly, transmitting the full machine weight to the track chain while resisting abrasive wear from continuous ground contact and chain engagement.

3.1.1 Material Selection and Alloy Engineering

Heli CQCTRACK employs strategic material selection based on application requirements, utilizing high-grade alloy steels proven in demanding undercarriage applications:

• Primary Material Grade: 50Mn or 40MnB Manganese-Boron Alloy Steel—selected for exceptional hardenability and impact toughness characteristics essential for construction and landscaping applications. These materials achieve the necessary wear-resistance and loading capacity through precision processing and special heat treatment techniques .
• Alternative Specification: 35MnB alloy steel providing good impact toughness and wear resistance for mini excavator applications .
• Manganese Function: Improves hardenability and tensile strength; ensures hardness penetration depth during quenching rather than forming a thin, brittle surface layer.
• Boron Micro-Alloying: Even in minute concentrations, boron acts as a hardenability catalyst, significantly increasing the steel’s capacity to achieve a hard, martensitic structure upon quenching without inducing brittleness.

Table 2: Material Grade Comparison for Mini Excavator Track Roller Applications

3.1.2 Warm Forging: The Superior Manufacturing Methodology

The manufacturing method fundamentally determines the internal grain structure and, consequently, the performance characteristics of the finished roller.

Warm Forging/Forged Construction (Heli CQCTRACK Standard):

• Process: Warm forging treatment (approximately 700-900°C) creates distinguishing inner material fiber flow distribution architecture, providing superior grain alignment .
• Grain Structure Engineering: The forging process aligns the grain flow to follow the contour of the roller, creating an anisotropic grain structure that exhibits superior fatigue resistance and impact strength . This optimized grain flow is critical for withstanding the cyclic loading inherent in excavator operations.
• Internal Integrity: Eliminates internal voids, porosity, and micro-inclusions common in castings; produces a dense, continuous structure free from porosity and shrinkage.
• Performance Advantage: Superior impact strength and fatigue resistance for load-bearing, abrasive environments; maximum extent loading capacity with excellent anti-cracking effects. Forged rollers are preferred for high-load operations even in mini excavator applications .

Cast Construction (Industry Alternative):

• Process: Molten steel poured into a mold and allowed to solidify.
• Structural Limitations: Granular, potentially porous structure with possible micro-voids and non-uniform grain orientation.
• Performance Limitations: Lower tensile strength; more susceptible to cracking under high-stress cyclic loading.

Table 3: Forged versus Cast Track Roller Comparison

3.1.3 Flange Geometry Engineering

The roller flanges provide critical lateral guidance to the track chain, preventing derailment during turning maneuvers and maintaining proper chain alignment.

• Flange Configuration: Available in single-flange and double-flange configurations depending on position requirements. Induction-hardened tread and flanges resist abrasion from rocks, dirt, and debris, extending roller and track life .
• Profile Precision: Flange profiles are machined to exacting tolerances to interface precisely with the track link counterparts, ensuring proper chain engagement and minimizing wear.
• Hardened Flange Surfaces: Flange sides receive the same induction hardening treatment as the running surface to resist wear from lateral link contact .

3.2 Shaft Metallurgy and Surface Engineering

The stationary shaft transmits the full dynamic loads of the excavator from the roller shell to the track roller frame mounting brackets.

• Material Selection: The shaft is machined from high-tensile alloy steel, selected for its exceptional strength-to-weight ratio and fatigue resistance. High-strength shafts are designed to support full machine weight and absorb dynamic impact loads .
• Heat Treatment: The shaft undergoes quenching and tempering heat treatment to achieve optimal core toughness and strength.
• Surface Engineering: Following CNC turning, the shaft is precision-ground to a high-quality surface finish at all bearing and seal contact areas to ensure proper seal performance and wear resistance.
• Diameter Optimization: Heli CQCTRACK engineers have optimized shaft diameters based on KOMATSU PC80-PC130 load calculations, ensuring adequate safety margins for mini excavator duty cycles.

3.3 Bearing System: Professional-Grade Rotational Interface

The bearing system enables smooth rotation of the roller shell about the stationary shaft under radial loads characteristic of excavator operations.

• Bearing Type Selection: Heli CQCTRACK utilizes heavy-duty bearings specifically engineered to handle the radial loads generated by the machine’s weight and dynamic forces. Internal bearings run in oil with multi-lip seals to retain lubrication .
• Heat-Treated Races: All bearing races are manufactured from premium-grade steel to resist Brinelling under impact loads, ensuring long-term dimensional stability.
• Load Rating Validation: Each bearing configuration is validated to withstand the static and dynamic loads generated by the 1-13 ton excavator during digging, lifting, travel, and swing operations.
• Internal Clearance Optimization: Bearings are selected with controlled internal clearances to accommodate thermal expansion during continuous operation while maintaining proper load distribution.

3.4 Sealing Architecture: Fortified Tribological Interface for Contaminated Environments

Industry data consistently demonstrates that premature undercarriage failures often originate from contamination ingress leading to bearing failure—a failure mode accelerated in construction and landscaping environments. Seal integrity directly dictates the service life of the entire roller assembly . Heli CQCTRACK addresses this failure mode through a multi-stage sealing architecture validated for contamination resistance.

3.4.1 Multi-Layered Seal System

Heli CQCTRACK engineers utilize a proprietary sealing architecture designed for long life and perfect performance under any working condition:

• Oil-Filled, Sealed Design: Internal bearings run in oil with multi-lip seals to retain lubrication and keep dust, mud, and water out for long service intervals .
• Floating Seal Design: The design of double-cone sealing and lubrication for life makes the track roller have long life time and perfect performance under any working condition .
• Contamination Exclusion: Multi-lip seals are engineered to exclude abrasive contaminants (silica, mud, dust) from the bearing chamber .

3.4.2 Seal Material Engineering

• Standard Material: Nitrile rubber (NBR) providing excellent oil resistance and high temperature resistance.
• Operating Temperature Range: Suitable for diverse climatic conditions from -20°C to +110°C.

3.4.3 Seal Integrity Testing

Every Heli CQCTRACK roller assembly undergoes rigorous seal integrity validation to guarantee reliable sealing performance.

3.5 Lubrication Engineering

• Lubrication Type: Designed as maintenance-free sealed units—no daily greasing required, only periodic visual checks as part of your undercarriage inspection . These assemblies are sealed and pre-lubricated at the factory for the entire service life of the roller.
• Grease Type: Factory-filled with high-quality, shear-stable grease ensuring consistent lubrication throughout the service life.
• Oil Circulation: The oil-filled design promotes proper lubrication to all bearing surfaces, ensuring consistent protection .

3.6 Mounting Interface Engineering

The mounting interfaces (shaft ends) provide the critical connection to the excavator’s track roller frame.

• Mounting Configuration: Precision-machined mounting surfaces ensure proper alignment with the track frame for direct-fit replacement .
• Bolt Hole Precision: Mounting holes are drilled to exact center-to-center tolerances ensuring even load distribution.
• Surface Flatness: Maintained within tight tolerances to ensure proper seating against the track frame.
• Retaining Mechanism: Secured with retaining bolts as specified by machine configuration.

4. Professional Manufacturing Process Engineering

Heli CQCTRACK maintains vertical integration across the manufacturing value chain, eliminating variance introduced by subcontracted processes and ensuring consistent professional-grade quality output suitable for KOMATSU PC80-PC130 mini excavator applications .

4.1 Metallurgical Validation and Incoming Inspection

• Spectrochemical Analysis: Incoming steel billets undergo spectrochemical analysis to verify exact chemical composition—ensuring compliance with specifications for carbon, manganese, and boron content critical for hardenability .
• Ultrasonic Testing: Raw materials undergo ultrasonic inspection to detect any internal voids, inclusions, or discontinuities that could compromise structural integrity.
• Grain Structure Verification: Metallurgical samples from forged components confirm proper grain flow alignment .

4.2 Precision Forging and Machining Sequence

The manufacturing process follows a carefully orchestrated sequence of operations with advanced CNC machine tools and heat treatment equipment .

4.2.1 Raw Material Preparation

• Steel billets are cut to precise dimensions based on roller size and weight requirements.
• Material traceability is established from the initial cutting stage.

4.2.2 Warm Forging

• Billets are heated to warm forging temperature (approximately 700-900°C).
• Closed-die forging under precision presses shapes the billet, creating distinguishing inner material fiber flow distribution architecture that follows the roller contour .
• Flash is trimmed, and the forged blank undergoes visual inspection.

4.2.3 Heat Treatment Process

Heli CQCTRACK employs a dual-stage heat treatment process to achieve optimal mechanical properties:

Stage 1: Quenching and Tempering (Q+T)

• Austenitizing: The roller body is heated to critical temperature to transform the microstructure.
• Quenching: Rapid cooling transforms the microstructure to martensite—a hard, wear-resistant structure.
• Tempering: Controlled reheating relieves internal stresses while maintaining core toughness.

Stage 2: Induction Hardening / Surface Quenching

• Selective Hardening: Induction hardening creates a deep, consistently hard case on the running surface and flange flanks—typically HRC52-58 with depth 8mm-12mm .
• Computer-Controlled Processing: All parameters are digitally monitored to ensure consistent case depth.
• Achieved Specifications: Surface hardness 52-58 HRC with case depth 8-12mm .

Table 4: Hardness Specifications—KOMATSU PC80-PC130 Track Roller Assembly

Engineering Rationale: The 52-58 HRC surface range provides optimal abrasion resistance against track chain bushings and ground debris in construction environments . The 8-12 mm case depth ensures that as the surface wears over thousands of operational hours, the newly exposed material maintains high hardness, preventing premature “wear-out” and extending service intervals.

4.2.4 Precision CNC Machining

• Rough Machining: The heat-treated blank is mounted on CNC turning centers for rough machining of basic dimensions.
• Outside Diameter Finishing: Precision turning achieves final diameter tolerances.
• Flange Profile Generation: Flange geometries are machined to exact specifications.
• Bore Machining: Internal bore is precision-machined for bearing and seal seating.
• Shaft Machining: The shaft is CNC turned and ground to final dimensions with appropriate surface finish at seal zones.
• Mounting Interface Machining: Mounting surfaces are machined to tight tolerances.

4.2.5 Assembly Process

Assembly follows strict protocols to ensure component integrity:

1. Component Cleaning: All parts are strictly inspected and cleaned before assembly.
2. Bearing Installation: Bearings are installed with proper settings.
3. Seal Assembly: Multi-lip seal rings are assembled properly; sealing surfaces are coated with grease.
4. Shaft Insertion: The shaft is inserted with mating surfaces properly lubricated.
5. End Cover Installation: End covers are installed with proper torque.
6. Greasing: The unit is filled with a precise volume of oil/grease for life-long lubrication .
7. Rotational Check: The assembled roller should rotate smoothly with some resistance but no jamming.

4.2.6 Quality Assurance and Testing Protocol

• Dimensional Inspection: Verification of all critical dimensions using precision measurement equipment.
• Hardness Testing: Rockwell tests on specified surfaces.
• Seal Integrity Testing: Each assembled roller undergoes testing to guarantee reliable sealing performance.
• Running Test: Simulated rotation test to verify functionality and smooth operation.

4.2.7 Surface Treatment and Coating

• Paint Finish: Application of corrosion-resistant paint system for surface protection.
• Color Options: Standard black or yellow, customizable per customer requirements.

4.2.8 Packaging

• Export Packaging: All products are securely packed using high-quality export cartons, reinforced wooden cases, or palletized packaging to ensure maximum protection during transit.

5. Application-Specific Engineering for KOMATSU PC80, PC90, PC100, PC120, and PC130 Excavators

5.1 KOMATSU PC Series Platform Overview

The KOMATSU PC80-PC130 series crawler excavators represent versatile mini to medium platforms widely deployed in construction, landscaping, and infrastructure applications.

PC80 Series:

• Operating Weight: Approximately 1-2 tons (PC80-3)
• Application: Small-scale construction, landscaping, utilities

PC90 Series:

• Operating Weight: Approximately 8-9 tons
• Application: General construction, utilities

PC100 Series:

• Operating Weight: Approximately 10-11 tons (PC100-1/2/3/5/6)
• Application: Construction, infrastructure, utilities

PC120 Series:

• Operating Weight: Approximately 12-13 tons (PC120-1/2/3/5/6)
• Application: Heavy construction, infrastructure

PC130 Series:

• Operating Weight: Approximately 13 tons (PC130-5/6/7/8)
• Application: Heavy construction, infrastructure, light quarry

5.2 Part Number Specific Engineering Considerations

Table 5: Application-Specific Engineering Features by Part Number

5.3 Compatibility Verification Requirements

Before ordering, verify the following machine parameters to ensure correct roller selection:

• Machine Serial Number (for precise model year and configuration)
• Undercarriage type and roller position (single-flange vs. double-flange requirements)
• Track shoe width and chain pitch
• Previous part number (if available for cross-reference)

A reliable parts supplier will use this information to look up the correct track roller assembly and ensure proper fitment .

6. Failure Mode Analysis and Professional Maintenance Integration

Understanding the mechanics of failure in mini excavator applications validates the engineering choices made in Heli CQCTRACK components and provides a roadmap for proactive maintenance.

6.1 Common Signs of Wear

According to industry technical literature, the following indicators signal that a track roller assembly requires inspection or replacement :

1. Uneven wear on the roller surface – Indicates abnormal loading or misalignment
2. Excessive play or wobbling – Suggests bearing wear or internal clearance issues
3. Oil leakage – Indicates seal failure and contamination ingress
4. Grinding or squeaking noises – Signifies inadequate lubrication or bearing damage
5. Excessive track noise or vibration – Indicates potential roller failure
6. Seized or stiff roller rotation – A seized roller will be visibly worn flat and cause accelerated track chain wear

6.2 Primary Failure Mode Analysis

Table 6: Failure Mode Analysis and Heli CQCTRACK Engineering Countermeasures

6.3 Recommended Professional Maintenance Practices

To maximize service life of Heli CQCTRACK track roller assemblies in KOMATSU PC80-PC130 applications, the following maintenance practices are recommended :

6.3.1 Regular Inspection Protocol

• Inspection Interval: Inspect rollers at 250-hour intervals as part of regular undercarriage inspection. Only periodic visual checks are required for these maintenance-free sealed units .
• Daily Visual Checks: Daily walk-around inspection should include checking for non-rotation, grease leakage (indicating seal compromise), and abnormal flange wear.
• Wear Measurement: Regular measurement of flange height and roller diameter against service limits is critical.
• Rotation Check: Ensure all rollers turn freely—a seized roller will be visibly worn flat and cause accelerated track chain wear.

6.3.2 Diagnostic Procedures

• Visual Inspection: Check for uneven wear on the roller surface, which may indicate abnormal loading or misalignment .
• Leak Detection: Inspect for oil leakage, which indicates seal failure.
• Auditory Inspection: Listen for grinding or squeaking noises during operation, which may signify inadequate lubrication or bearing damage .
• Play Verification: Check for excessive play or wobbling, which suggests bearing wear .

6.3.3 Preventive Maintenance

• Track Tension Management: Maintain track tension per KOMATSU manufacturer specifications. Proper tension helps minimize undercarriage wear, reduce vibration, and improve machine stability on rough ground .
• Cleanliness Protocol: Regularly clean debris and mud off the undercarriage to prevent accelerated seal damage.
• Alignment Check: Periodically verify proper roller alignment with the track frame. If rollers show uneven flange wear, this indicates misalignment requiring investigation.

6.3.4 Systematic Replacement Guidelines

• Replacement in Sets: For optimal undercarriage performance, replace worn rollers in matched sets on the same side for balanced load distribution.
• Synchronized Replacement: Assess roller wear in conjunction with track chain, sprocket, and idler condition.
• Replacement Threshold: Replace rollers when wear indicators suggest the hardened case depth has been consumed or when diameter/flange wear exceeds service limits.

7. Technical Specifications Summary—KOMATSU PC80-PC130 Track Roller Assemblies

Table 7: Technical Specifications Summary—Heli CQCTRACK KOMATSU PC80-PC130 Track Rollers

8. Heavy-Duty Sourcing and Logistics Support

Heli CQCTRACK supports global procurement operations with comprehensive logistics capabilities designed for the demanding schedules of equipment operations:

• Manufacturer Identification: CQCTRACK operates as a dedicated undercarriage component manufacturer with specialized focus on undercarriage parts for excavators and bulldozers .
• Value Proposition: Sourcing components directly from a manufacturer like CQCTRACK offers a value-based alternative to genuine OEM parts, combining direct-from-factory pricing with engineering tailored to withstand demanding conditions.
• Export Documentation: Full commercial invoices, packing lists, certificates of origin, and material test reports provided with each shipment.
• Flexible Shipping Options:
  • International sea freight (FCL/LCL) for cost-effective bulk transport
  • Air freight for urgent order fulfillment
  • Express courier (DHL, FedEx, UPS) for sample or emergency small-volume orders
• Port of Shipment: Xiamen, China (primary) with capability for other major ports based on customer requirements
• Lead Times: Standard production orders: 20-30 working days; stock items: 7-10 days for expedited shipping
• Minimum Order Quantity: Flexible MOQ accommodating both trial orders and fleet-level bulk procurement
• Payment Terms: T/T (Telegraphic Transfer) standard; L/C (Letter of Credit) available for major contracts

9. Conclusion: Heli CQCTRACK as the Professional Source Manufacturer for KOMATSU PC80-PC130 Undercarriage Components

The Heli CQCTRACK manufacturing philosophy for the KOMATSU 820220032, 2033000110, 2033000111, 2033000140, 20E30K1580, and 22B3000010 Track Roller Assemblies represents a definitive advancement in mini excavator undercarriage technology. Through rigorous material selection (utilizing high-grade 50Mn/40MnB/35MnB alloy steels) , precision warm forging with grain flow alignment , advanced induction heat treatment protocols achieving optimal 52-58 HRC surface hardness with 8-12 mm case depth , multi-lip seal systems validated for contamination resistance , and ISO 9001:2015 certified manufacturing processes , Heli CQCTRACK delivers track roller assemblies that achieve and exceed OEM-quality performance standards for the most demanding KOMATSU PC80, PC90, PC100, PC120, and PC130 mini excavator applications.

For the equipment manager or procurement specialist managing KOMATSU PC-series excavator fleets operating in construction, landscaping, infrastructure, and utilities applications, the value proposition is clear: investing in Heli CQCTRACK professional track roller components means investing in maximized machine availability, minimized unplanned downtime, extended component life in diverse operating environments, and predictable, optimized total cost of ownership .

These are not generic replacement parts—they are professionally engineered solutions validated through certified manufacturing processes, backed by comprehensive material traceability, and designed from the ground up to meet the demands of global construction and earthmoving applications where component reliability is essential.

10. References and Engineering Resources

For additional technical information, application engineering support, or to discuss professional OEM/ODM requirements:

• Engineering Consultation: Heli CQCTRACK applications engineers available to discuss specific duty cycles and recommend optimal component specifications.
• Technical Drawings: Detailed 2D and 3D CAD models available upon request for engineering verification.
• Installation Manuals: Comprehensive installation instructions aligned with KOMATSU service manual procedures available with each shipment.
• Material Certifications: Mill test reports and heat treatment certification available for each production batch.
• Fitment Support: Drawing or serial number verification available to confirm compatibility. A good supplier will have a compatibility chart and can cross-reference machine models .

For technical specifications, professional OEM/ODM inquiries, pricing, or to place an order:

Heli Machinery Manufacturing Co., Ltd. (CQCTRACK)
ISO 9001:2015 Certified • Mini Excavator Undercarriage Parts Source Manufacturer and Supplier • Global Supplier Since 2002
Contact: Jack (International Sales Director)
Web: www.cqctrack.com
Product Range: Track Roller Assemblies, Track Carrier Rollers, Front Idlers, Track Sprockets, Track Chains, and Complete Undercarriage Systems for 0.8T to 300T Excavators and Bulldozers

This technical document is provided for engineering and procurement reference. Specifications subject to change due to continuous product improvement for professional applications. All brand names and part numbers are referenced for cross-reference purposes only; Heli CQCTRACK is an independent professional manufacturer specializing in undercarriage components for construction and earthmoving applications. Always verify machine serial number and undercarriage configuration before ordering