Dingtai manufactures Komatsu bulldozer track chain assemblies, critical undercarriage components connecting track shoes and transmitting drive force under extreme loads.
Factory-direct production supports global clients with full OEM manufacturing services, custom specifications, and reliable export packaging for distribution.
Precision heat-treated chains reduce unplanned downtime by resisting wear, elongation, and breakage in severe abrasive bulldozer applications.
With over 20 years of undercarriage manufacturing experience, Dingtai holds ISO9001 and SGS certifications ensuring repeatable quality.
We use 35MnB boron steel and deep quenching to deliver high hardness and impact toughness for extended service life.
Core Selling Points
- Global Brand Compatibility: Direct replacement for Komatsu D20, D31, D41, D65, D85, D155 and other popular series; critical dimensions match OEM drawings.
- Premium 35MnB Material: Track chains are forged from 35MnB boron steel, providing high tensile strength, impact fatigue resistance, and reliable performance under heavy loads.
- Deep Quenching/Heat Treatment: Induction hardening creates a hardened case on pins and bushings, reducing abrasive wear and preventing premature chain pitch elongation.
- 100% QC Inspection: Every assembly undergoes dimensional inspection, hardness testing, and magnetic particle inspection before packing to eliminate defective parts.
Product Range
Our catalog of Komatsu Bulldozer Track Chain Assembly includes various specifications, fully compatible with Komatsu D20, D21, D31, D37, D41, D65, D85, D155, D275, and D375 bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB / 40Mn2 boron steel |
| Hardness | HRC 52–58 on pins and bushings |
| Heat Treatment | Induction hardening, deep quenching, tempering |
| Process | Precision forging, CNC machining, assembly |
| Certification | ISO9001:2015, SGS |
| Warranty | 12 months / 2,000 working hours |
2. OEM & Customization
We manufacture to customer drawings or samples, matching pitch, pin diameter, bushing length, and link height to strict OEM standards.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Small Bulldozer | Komatsu | D20, D21, D31, D37 |
| Medium Bulldozer | Komatsu | D41, D65, D85 |
| Large Bulldozer | Komatsu | D155, D275, D375 |
4. Delivery & Logistics
Factory-direct pricing, stable export packing, and flexible MOQ support trial orders. We ship by sea or land with reliable lead times.
Technical Features
Sealed and lubricated track chain designs keep oil inside the pin-to-bushing joint, reducing internal friction and extending service intervals.
Precision forged links and induction-hardened bushings distribute drawbar pull evenly, preventing pitch elongation under high-stress operation.
Bolt-on master links simplify field assembly and reduce downtime during track chain replacement and undercarriage maintenance.
Applications
- Mining
- Road Construction
- Quarrying
- Forestry
- Landfill
- Heavy Civil Earthmoving
Frequently Asked Questions
1. What is the minimum order quantity?
MOQ is typically two assemblies per specification. Trial sample orders are accepted for first-time buyers.
2. What is the standard delivery time?
Standard production takes 25–35 days. Rush orders are possible depending on current capacity.
3. What material and heat treatment do you use?
We use 35MnB or 40Mn2 steel. Pins and bushings are induction hardened to HRC 52–58 with a deep hardened case.
4. How do I match my Komatsu OEM part number?
Send us your OEM part number or drawing. We cross-reference dimensions, pitch, and link height before quotation.
5. What warranty do you provide?
Warranty covers 12 months or 2,000 working hours against manufacturing defects. Normal wear is excluded.
6. Can you produce non-standard or custom track chain assemblies?
Yes, we produce custom pitch, link height, and pin/bushing dimensions to meet specific undercarriage requirements.
7. How do you ensure quality before shipment?
Every assembly receives 100% dimensional inspection, hardness testing, and magnetic particle inspection on critical components.
Maintenance Guide
- Check track sag daily; over-tight or loose track accelerates pin and bushing wear, reducing overall undercarriage life.
- Inspect sealed joints for oil leakage or dry contact. External oil loss indicates seal damage and requires immediate service.
- Measure pitch elongation at regular intervals and replace the chain when wear exceeds the Komatsu OEM wear limit.
- Replace sprockets and chain together. Worn sprockets accelerate chain pin and bushing wear and cause premature failure.
- Clean the undercarriage frequently to remove abrasive debris from rotating joints and extend track chain service life.