Product Specifications

Technical Procurement & Sourcing Guide: CATERPILLAR D9R Heavy-Duty Bulldozer Track Group (43L-610mm)

Supplier: HAN GONG Machinery (DPW PART)

1. Executive Summary: Strategic Sourcing for D9R Undercarriage Components

The CATERPILLAR D9R Track-Type Tractor is an industry benchmark for heavy-duty dozing, ripping, and mining applications. With an operating weight of approximately 48,361 kg (106,600 lbs) and powered by the Cat® 3408C engine featuring 44% torque rise, the D9R demands an undercarriage system engineered to withstand extreme tensile loads, abrasive wear, and impact stresses .

The track group configuration identified by reference numbers CA3794044, 4587790, 6586419, 6586413, 6586459, 5120738, and 6137171—specified for 43-section track chain with 610mm (24 inch) extreme service shoes—represents the complete undercarriage mobility solution for the D9R platform. This document provides a comprehensive sourcing and technical guide for procurement from HAN GONG Machinery (DPW PART brand), a specialized manufacturer of heavy-duty undercarriage components for mining and construction equipment.

2. Product Identification & Cross-Reference Matrix

Accurate component identification is essential for procurement operations. The following matrix establishes the relationship between reference numbers and their respective components within the D9R track group.

2.1 Component Reference Summary

2.2 Track Configuration Specifications

2.3 Quantity per Machine

3. Supplier Profile: HAN GONG Machinery (DPW PART)

3.1 Company Positioning

HAN GONG Machinery is a manufacturer and global supplier of undercarriage components for heavy machinery, operating under the DPW PART brand for international distribution. The company specializes in producing aftermarket replacement parts for major OEMs including Caterpillar, Komatsu, Hyundai, and XCMG .

Key Attributes:

• Vertically integrated manufacturing (forging → machining → heat treatment → assembly)

• Cost-effective alternatives to OEM parts without compromising quality

• Global supply chain capability with export documentation

• Technical support and engineering data access

3.2 Manufacturing Capabilities

Based on documented manufacturing processes for similar heavy-duty components, HAN GONG employs the following production capabilities :

4. Track Group Component Technical Specifications

4.1 Track Chain Assembly (Reference: 4587790, 5120738, 6137171)

The track chain is the backbone of the D9R undercarriage, consisting of interconnected links, pins, and bushings.

Link Material and Manufacturing :

• Material: Forged 35MnB, 40MnB, or 50Mn alloy steel

• Process: Closed-die hot forging with controlled grain flow

• Heat Treatment: Quenched and tempered (Q&T) for core toughness; induction hardened on wear surfaces

• Surface Hardness: HRC 52-58 on critical wear surfaces

• Case Depth: 8-12 mm effective hardened layer

Pin and Bushing System (Reference: 5120738) :

• Pin Material: High-carbon chromium steel or carburized alloy steel

• Bushing Material: Sintered bronze or through-hardened steel

• Pin Diameter: Precision-ground to specified tolerance

• Fit Type: Interference fit for bushing-to-link assembly

Sealing System (Reference: 6137171) :

• Type: Sealed and Lubricated Track (SALT) with multi-stage sealing

• Seal Configuration: Multi-labyrinth with NBR double-lip seals

• Lubricant: High-viscosity EP lithium complex grease

• Operating Temperature Range: -30°C to +150°C

4.2 Track Shoe Assembly (Reference: 6586419, 6586413)

The track shoe provides the direct ground interface for the D9R.

4.3 D9R Machine Specifications for Context 

5. Quality Assurance Framework

HAN GONG's quality system for D9R track group components incorporates mandatory inspection gates to ensure batch-to-batch consistency :

5.1 Material Validation

• Spectrographic chemical analysis against certified specifications

• Ultrasonic testing for internal flaw detection

• Hardness verification and grain structure examination

5.2 In-Process Controls

• 100% dimensional inspection of critical features using CMM equipment

• Real-time monitoring of heat treatment parameters

• Magnetic particle inspection for surface defects

5.3 Final Assembly Validation

• Hardness mapping (multiple-point verification)

• Rotational torque analysis for bearing preload

• Seal pressure testing for contaminant exclusion

5.4 Traceability Systems

• Material certificates (EN 10204 3.1 or equivalent)

• Digital retention of heat treatment logs

• Production lot traceability for root cause analysis

6. Procurement Strategy & Commercial Considerations

6.1 Value Proposition for Aftermarket Sourcing

6.2 Sourcing Best Practices

When procuring D9R track group components from HAN GONG / DPW PART:

1. Provide Complete Machine Information: Confirm D9R serial number and year of manufacture to ensure compatibility

2. Request Quality Documentation: Obtain material certificates, hardness reports, and dimensional inspection records 

3. Inspect Upon Delivery: Verify bolt patterns, mounting surfaces, and overall condition before installation

4. Replace in Matched Sets: Always replace track groups on both sides simultaneously to maintain even wear and machine stability

6.3 Maintenance and Replacement Strategy

System Synchronization:

• Replace track chain and sprocket simultaneously when both show significant wear

• Mismatched wear patterns accelerate failure of new components

Inspection Protocol :

• Visual inspection every 250 operating hours

• Check for seal integrity and grease leakage

• Monitor for abnormal flange wear or restricted rotation

• Measure track sag per Caterpillar specifications

7. Market Availability Verification

The D9R 43L-610mm track group configuration has been verified as available in the aftermarket supply chain:

• Machineryline Listing: Set Trackgroups (2 pieces) to fit Caterpillar D9R/D9T Dozer, 610mm / 24" shoe width, 43 sections 

• Machinio Listing: Set Berco Trackgroups (2 pieces) to fit Caterpillar D9R/D9T Dozer, 610mm / 24" shoe width, 43 sections 

These listings confirm the product configuration is actively traded and available from multiple suppliers in the European market.

8. Conclusion & Recommendations

The CATERPILLAR D9R Track Group (43L-610mm) with reference numbers CA3794044, 4587790, 6586419, 6586413, 6586459, 5120738, and 6137171 represents a critical undercarriage investment for D9R owners and operators.

Key Advantages of Sourcing from HAN GONG / DPW PART:

• Direct manufacturer pricing with OEM-equivalent quality standards

• Vertically integrated production ensuring full traceability

• Documented quality assurance processes including material certification

• Global supply chain capability with technical support

For procurement success:

• Verify machine serial number before ordering

• Request and retain quality documentation

• Plan for matched set replacement (both sides)

• Integrate with scheduled undercarriage maintenance program

Disclaimer: Caterpillar, CAT, D9R, D9T, and associated part numbers are trademarks of Caterpillar Inc. HAN GONG Machinery and DPW PART are independent manufacturers of aftermarket replacement components. Products are engineered for mechanical interchangeability with OEM specifications. This document is for informational purposes and does not imply affiliation or endorsement by Caterpillar Inc.