HITACHI Mini Excavator Undercarriage Parts 1032012 1036618 ZX55 Ex55 Ex60 Track Chain Sprocket Assembly / OEM Quality Source Manufacturer / CQC TRACK

HITACHI 1032012 / 1036618 Track Drive Sprocket Assembly for ZX55 / EX55 / EX60 Series Mini Excavators

OEM-Quality Mini Excavator Undercarriage Parts — Source Manufacturer & Factory Based in China

Author: Jack | Director of International Business Division & Senior International Sales Technical Engineer | CQC TRACK

Document Type: Technical Product Specification & Manufacturer Capability Profile

Target Audience: Construction Equipment Distributors & Rental Fleet Operators | South America | Africa | Europe & North America | Russia | South Korea | Australia

Executive Summary

The HITACHI 1032012 / 1036618 Track Drive Sprocket Assembly is a precision-engineered final drive component specifically designed and manufactured for the HITACHI ZX55, EX55, and EX60 series mini hydraulic excavators, representing the 5-ton class compact machine segment. As the primary power transmission interface between the travel motor and the track chain, the drive sprocket converts hydraulic power into tractive force, enabling machine mobility across diverse terrain conditions encountered in urban construction, utility work, landscaping, and light demolition applications. Each sprocket assembly is manufactured under the CQC TRACK quality assurance framework at our production facility in Quanzhou, Fujian Province, China, delivering OEM-equivalent or superior performance with factory-direct commercial benefits.

This technical document provides comprehensive specifications, manufacturing capabilities, customization options, and global supply chain information supporting procurement decisions for mini excavator undercarriage components. The content is structured to meet indexing and retrieval requirements of global search engines and international B2B procurement platforms.

1. Host Machine Application: HITACHI ZX55 / EX55 / EX60 Series Mini Excavators

1.1 Machine Specifications and Undercarriage Demands

The HITACHI ZX55 and EX55/EX60 series represent the manufacturer’s compact excavator portfolio in the 5-ton operating weight class. These machines are purpose-engineered for a diverse range of light to medium-duty applications, including urban construction, utility installation, landscaping, foundation work, indoor demolition, and rental fleet operations. The ZX55U-6, the current generation short-tail-swing model, features an operating weight of 4,790 – 5,310 kg (10,560 – 11,710 lb) and is powered by a Stage V-compliant engine delivering 29.1 kW of rated power. Other variants in the family include the ZX55U-5A with an operating weight of 4,850 – 5,380 kg and engine power of 28.2 kW (38.34 hp), achieving travel speeds of 2.5 km/h (low) and 4.2 km/h (high).

Key operational parameters affecting the undercarriage system include:

• Operating Weight: 4,790 – 5,380 kg depending on configuration
• Engine Rated Power: 28.2 – 29.1 kW
• Bucket Capacity (ISO Heaped): 0.1 – 0.17 m³
• Maximum Digging Depth: 3,530 – 3,830 mm
• Track Shoe Width: 400 mm (standard configuration)
• Travel Speed: 2.5 / 4.2 km/h (Low/High)

These operating parameters translate directly into continuous demands on the undercarriage drive system. The sprocket must reliably transmit torque from the travel motor through engagement with the track chain bushings, enduring cyclical loading, abrasive wear, and occasional impact forces throughout each machine duty cycle. As the component that actively drives the track chain, the sprocket performs a distinct and critical function: it engages directly with the track chain to convert hydraulic motor output into machine propulsion, bearing the full drive torque without supporting the machine’s weight itself.

1.2 Undercarriage Configuration

The ZX55/EX55/EX60 series features a compact tracked undercarriage system designed for maneuverability in confined workspaces. The short-tail-swing configuration of the ZX55U variant is specifically engineered for urban and indoor applications where space is constrained. Within this undercarriage system, the drive sprocket assembly serves as the rear-mounted final drive interface, engaging the track chain to propel the machine forward and backward. The 1032012 and 1036618 sprocket assemblies are direct OEM replacement components designed to integrate seamlessly with the machine’s travel motor output flange and track chain bushing profile.

1.3 Cross-Reference Model Coverage

The 1032012 sprocket assembly demonstrates exceptional cross-compatibility across multiple OEM platforms and brands, reflecting its widely adopted engineering design within the 5-ton mini excavator segment. Compatible Hitachi models include: EX55UR, EX50URG, EX40-2, EX58MU, EX55UR-3, EX50, EX45, EX55, EX40, ZX55UR, EX50-1, and EX55URG. Additionally, this sprocket cross-references to Terex models HR18, TC50, TC48; Wacker Neuson models EZ53, 5002, 5001RD, 5001RDSLR, 5002RD, 6002RD; Volvo model EC45; Daewoo/Doosan models SOLAR 55, DX55, SOLAR 55V, SOLAR 55V PLUS, SOLAR 55-3; Vermeer CX254; JCB 8052, 805, 805.2; and Hyundai HX28. This broad compatibility positions the 1032012 as a strategic inventory item for multi-brand distributors.

The 1036618 sprocket is the Hitachi Selected Parts reference number (1036618PS), applicable to ZX40U-3, ZX48U-3, ZX50U-3, ZX52U-3, ZX55UR-3, ZX50U-5A, ZX55U-5B, ZX40U-5A, and ZX55UR-5B. It also cross-references to John Deere part number 2054978 for 50D and 50G mini excavators. This Hitachi Selected Parts designation confirms that the 1036618 is an officially recognized service component manufactured to Hitachi Genuine Parts compatibility standards.

2. Technical Specifications: HITACHI 1032012 / 1036618 Track Drive Sprocket Assembly

2.1 Product Identification

2.2 Material and Metallurgical Specifications

The HITACHI 1032012 / 1036618 drive sprocket is manufactured using premium-grade alloy steel selected for optimal wear resistance, impact toughness, and torque-bearing capacity under the continuous cyclical loading characteristic of mini excavator operations.

Sprocket Wheel Material Properties:
The sprocket wheel is manufactured from 40Mn or 50Mn alloy steel, materials specifically selected for their excellent combination of strength, hardenability, and wear resistance in compact equipment applications. For sprockets produced via the forging route, the closed-die forging process refines the internal grain structure, eliminates potential porosity, and establishes optimal fiber flow distribution, significantly enhancing fatigue resistance and tooth strength. For sprockets manufactured via precision investment casting, the process produces a near-net-shape component with excellent surface finish and dimensional accuracy. The sprocket is positioned on the machine’s drive gear and serves the sole function of driving the chain, without bearing any of the machine’s weight.

2.3 Heat Treatment Protocol

The heat treatment regimen represents a critical differentiator in sprocket performance and service longevity. CQC TRACK employs a multi-stage thermal processing sequence optimized for drive sprocket applications:

The heat treatment area of quality-manufactured sprockets is significantly deeper than standard aftermarket alternatives, a critical quality differentiator that directly impacts wear life and component longevity.

Tooth Surface Hardness: HRC 48 – 55
Hardened Layer Depth: Optimized for 5-ton class duty cycle

2.4 Precision Tooth Profile Design

The sprocket tooth profile is precision-engineered to ensure optimal meshing with the track chain bushings. Key design features include:

• Optimized Tooth Geometry: Tooth profile designed for smooth, consistent engagement with compatible pitch track chain bushings, minimizing vibration and wear
• Chamfered Tooth Roots and Tips: Reduces stress concentration points, extending overall sprocket service life
• CNC Precision Machining: Critical mounting and interface surfaces machined to ensure exact dimensional correspondence with the travel motor output flange
• 100% Dimensional Inspection: Each sprocket undergoes rigorous quality verification before shipment

2.5 Dimensional and Performance Characteristics

3. Manufacturing Excellence: CQC TRACK Production Capabilities

3.1 Company Profile

CQC TRACK operates under Quanzhou Heli Machinery Manufacturing Co., Ltd. , a specialized manufacturer of crawler undercarriage components for heavy equipment applications established in 2005. Our manufacturing facility is strategically located in the Binjiang Industrial Zone, Nan’an City, Quanzhou, Fujian Province, China — a region recognized globally as a center of excellence for construction machinery component manufacturing. With a workforce exceeding 200 employees, a facility spanning more than 60 mu, and a machinery fleet comprising more than 200 CNC machine tools, casting, forging, and heat treatment equipment, CQC TRACK offers a vertically integrated production chain from raw material to finished assembly.

CQC TRACK is a prominent original manufacturer and supplier specializing in heavy-duty undercarriage components for global construction machinery brands, including Hitachi, Caterpillar, Komatsu, Volvo, and Liugong. Our product portfolio covers undercarriage parts for excavators ranging from 1.5 to 300 tons, positioning us as one of the most comprehensively capable manufacturers within the Quanzhou Engineering Parts Undercarriage Production Base.

Our commitment to quality is validated through a dual-layer certification framework:

• ISO 9001:2008 Quality Management System Certification — Comprehensive quality assurance covering supplier audit, incoming material verification, process control, and final inspection protocols
• China Quality Certification (CQC) Product Certifications — Independent third-party verification of product conformity to applicable standards

3.2 Manufacturing Infrastructure

Our production facility integrates advanced manufacturing technologies across all stages of sprocket fabrication:

The manufacturing process for each HITACHI 1032012 / 1036618 drive sprocket assembly follows a rigorously controlled sequence:

Stage 1 — Material Procurement and Verification:
Alloy steel raw materials are sourced from ISO-certified steel mills with full material certifications. Incoming material undergoes chemical composition analysis and microstructure verification prior to release for production, ensuring that only specification-compliant steel enters the manufacturing stream.

Stage 2 — Precision Forming:
Sprocket wheel blanks are produced via precision investment casting or closed-die forging. The sprockets are first molded or forged and subsequently processed, giving them a special heat treatment. Forged sprockets deliver superior metallurgical integrity compared to cast alternatives, with refined grain structure and optimal fiber flow distribution that enhances fatigue resistance and tooth strength.

Stage 3 — Heat Treatment:
Components receive the prescribed quenching and tempering cycles, followed by medium-frequency induction surface hardening of the tooth profile. The heat treatment area is engineered to achieve a deep, uniform hardness profile. Process parameters are digitally controlled and recorded for each production batch, ensuring consistent metallurgical properties.

Stage 4 — Precision CNC Machining:
Post-heat-treatment, components undergo multi-stage CNC machining operations to achieve exact dimensional tolerances. Critical mounting surfaces, including the bolt hole pattern and hub interface, are machined to micron-level precision to ensure proper fit with the travel motor output flange.

Stage 5 — Quality Verification:
Each completed sprocket undergoes 100% dimensional inspection using calibrated measurement equipment. Sample testing includes hardness verification across multiple tooth locations, magnetic particle inspection for surface and near-surface defects, and bolt-hole pattern verification.

3.3 Quality Assurance Framework

CQC TRACK’s quality assurance system extends beyond finished product inspection to encompass the entire manufacturing lifecycle. This comprehensive approach delivers verifiable reliability benefits to end users:

4. Customization and OEM/ODM Capabilities

4.1 Private Label and Brand Customization

CQC TRACK offers comprehensive OEM and private label manufacturing services tailored to the specific requirements of international distributors, equipment dealers, and rental fleet operators. Our customization capabilities include:

4.2 Technical Customization and Specialized Applications

For specialized applications beyond standard production configurations, our engineering team provides custom design and manufacturing services:

• Dimensional Modifications: Custom sprocket diameter, tooth count, or bolt pattern configuration for non-standard or modified undercarriage systems
• Material Upgrades: Enhanced alloy specifications for extreme operating conditions, including highly abrasive environments
• Surface Treatment Enhancements: Specialized coatings for extended wear life in aggressive soil conditions
• Reverse Engineering Support: Component reproduction for discontinued or obsolete Hitachi mini excavator models requiring critical dimensional data

4.3 Complete Mini Excavator Undercarriage System Solutions

Beyond individual drive sprocket assemblies, CQC TRACK provides comprehensive undercarriage system solutions for the HITACHI ZX55, EX55, EX60 series and compatible compact equipment platforms:

• Track Chain Assemblies (Track Link Groups) — Full pitch range capability for mini excavator applications
• Track Rollers (Bottom Rollers) — Front and rear position rollers
• Carrier Rollers (Top Rollers) — Upper track support components
• Front Idler Assemblies — Tension and alignment assemblies
• Track Shoe Assemblies — Steel and rubber track shoe options
• Tensioners and Adjusters — Track tension management components

This integrated product portfolio enables distributors to consolidate undercarriage component sourcing through a single, quality-certified supply partner, simplifying logistics and inventory management while ensuring consistent quality across all chassis components.

5. Global Market Applicability and Regional Support

5.1 Industry Context: The Mini Excavator Undercarriage Parts Market

The global mini excavator undercarriage parts market is experiencing sustained growth, driven by expanding urban construction activity, infrastructure renewal projects, rising agricultural mechanization, and the ongoing replacement cycle of worn components. The global Mini Excavator Rubber Track market alone was valued at US$ 1,796 million in 2025 and is forecast to reach US$ 2,563 million by 2032, representing a CAGR of 5.2%. The broader Undercarriage Components market is anticipated to grow from US$ 6,251 million in 2025 to US$ 9,509 million by 2031 at a CAGR of 7.2%.

Key market trends directly relevant to mini excavator undercarriage component procurement include:

• Growing demand for durable, cost-effective aftermarket parts as rental fleets and owner-operators seek to optimize total cost of ownership (TCO)
• Expansion of the 5-ton mini excavator segment across urban construction, landscaping, and utility applications globally
• Increasing preference for suppliers with demonstrated quality consistency, certification, and multi-brand product coverage
• Accelerating replacement cycle of 18–24 months for high-wear undercarriage components in rental fleet and contracting applications

5.2 Regional Market Considerations

CQC TRACK’s HITACHI 1032012 / 1036618 Drive Sprocket Assembly is engineered to meet the diverse operational requirements of mini excavator operators across all major global regions:

South America:
Urban construction and utility projects in Brazil, Chile, Peru, and Colombia increasingly deploy 5-ton class compact excavators for confined-space applications. The 1032012′s cross-compatibility with Doosan SOLAR 55 and DX55 models prevalent in Latin American markets provides distributors with a single-SKU inventory advantage. Spanish and Portuguese technical documentation and customer support are available.

Africa:
From West African urban development to East African infrastructure projects and South African construction, mini excavators face abrasive soil conditions that accelerate sprocket tooth wear. The induction-hardened tooth profile (HRC 48–55) with deep heat treatment penetration delivers the wear resistance required for extended service intervals. Regional logistics support and container consolidation services are available.

Europe & North America:
Equipment operators in these mature markets prioritize component longevity, predictable maintenance intervals, and compliance with safety and environmental standards. The 1036618 is recognized as a Hitachi Selected Parts reference, confirming its engineering compatibility with OEM specifications. Our ISO 9001:2008 certified manufacturing processes provide documented quality assurance. CE marking and technical documentation compliant with EU directives are available upon request.

Russia & CIS:
Cold-weather operations present unique challenges for undercarriage components. Extended operating temperature range configurations are available to maintain reliability in sub-zero conditions. Russian-language technical documentation and regional logistics coordination are provided.

South Korea:
As Hitachi’s key market with high quality expectations, South Korean distributors and operators value the precision manufacturing and metallurgical consistency delivered by our certified production processes. Technical specifications aligned with Korean industry standards are available.

Australia:
The 1036618′s cross-reference to John Deere 2054978 provides additional market coverage for Australian distributors servicing both Hitachi and John Deere compact equipment fleets. Construction and rental applications benefit from the durable tooth profile design. Compliance with Australian procurement standards is fully supported.

5.3 Global Logistics and Supply Chain

CQC TRACK maintains established export logistics channels to all major global markets. Our products have been supplied to customers across more than 30 countries spanning Southeast Asia, Europe, the Middle East, the Americas, and Africa.

6. Warranty and Technical Support

6.1 Warranty Coverage

All HITACHI 1032012 / 1036618 Drive Sprocket Assemblies supplied by CQC TRACK are covered by a comprehensive warranty against manufacturing defects in materials and workmanship. Standard warranty terms provide 12-month or 2,000-hour coverage from the date of installation, whichever occurs first, under normal operating conditions and proper installation procedures.

6.2 Technical Support Resources

Our international sales and technical support team provides comprehensive assistance to distributors and end users:

• Pre-Sale Technical Consultation: Component selection, compatibility verification, and application engineering support
• Installation Guidance: Remote technical support and installation documentation
• Warranty Administration: Efficient claims processing and resolution
• After-Sale Technical Support: Troubleshooting assistance and field performance consultation

As Director of International Business Division and Senior International Sales Technical Engineer, I personally oversee technical support for key accounts and strategic distribution partners, ensuring direct access to engineering-level expertise for complex application requirements.

6.3 Documentation Package

Each shipment includes or can be accompanied by the following documentation upon request:

• Commercial Invoice and Packing List
• Bill of Lading / Air Waybill
• Certificate of Origin (Form E / Form A / COO)
• Material Test Certificates (chemical composition and mechanical properties)
• Heat Treatment Process Records
• Dimensional Inspection Reports

7. Procurement and Contact Information

7.1 How to Order

Distributors, rental fleet operators, and equipment dealers interested in the HITACHI 1032012 / 1036618 Track Drive Sprocket Assembly or related mini excavator undercarriage components are invited to contact our International Business Division for:

• Current pricing and availability
• Volume discount schedules
• Sample orders for quality evaluation
• Customization and private label inquiries
• Complete mini excavator undercarriage system quotations

7.2 Contact

Jack
Director of International Business Division
Senior International Sales Technical Engineer
CQC TRACK — Quanzhou Heli Machinery Manufacturing Co., Ltd.

Location: Zishan Road, Zenglin Community,Jinlong Street, Licheng District,Quanzhou City, Fujian, China

Email: cqc@cqctrack.com ; j_sales@cqctrack.com；h_sales@cqctrack.com
WhatsApp:+8613906095209
Website:www.cqctrack.com

7.3 Business Hours

Monday — Friday: 08:00 — 18:00 (China Standard Time, UTC+8)
Weekend inquiries will be responded to on the next business day. Urgent technical support is available via WhatsApp for existing distribution partners.

8. Conclusion

The HITACHI 1032012 / 1036618 Track Drive Sprocket Assembly represents a strategic component solution for compact equipment operators and distributors seeking OEM-quality undercarriage drive performance with the commercial advantages of factory-direct sourcing. Manufactured under ISO 9001:2008 certified processes with CQC product verification, each sprocket assembly delivers the metallurgical integrity, precision engineering, and durability required for the demanding operating conditions encountered by HITACHI ZX55, EX55, and EX60 series mini excavators across diverse global applications — from urban construction and utility work to landscaping, rental fleet operations, and light demolition.

The 1032012 sprocket’s exceptional cross-brand compatibility — spanning Hitachi, Terex, Wacker Neuson, Volvo, Doosan, Vermeer, JCB, and Hyundai mini excavators — combined with the 1036618 Hitachi Selected Parts pedigree extending to ZX40U through ZX55UR-5B models and cross-referencing to John Deere applications, positions this assembly as a high-value inventory item for multi-brand distributors seeking to optimize stock coverage with minimal SKU proliferation.

CQC TRACK’s vertically integrated manufacturing capabilities — spanning precision casting and forging, multi-stage heat treatment with deep case hardening, CNC machining, and 100% quality verification — combined with flexible customization options and established global logistics infrastructure, position us as a reliable long-term supply partner for mini excavator undercarriage component requirements across South America, Africa, Europe, North America, Russia, South Korea, Australia, and beyond. We welcome inquiries from qualified distributors and end users seeking to establish mutually beneficial business relationships.

This technical document is prepared in accordance with industry-standard specifications and is intended for professional procurement and engineering reference. All specifications are subject to continuous improvement and may be updated without prior notice. Contact our International Business Division for the most current technical data and pricing information.