D155A-3 Bulldozer Track Adjuster Assembly for Komatsu Dozer Parts
High-quality track adjuster assembly for Komatsu D155A-3 bulldozers, made from forged alloy steel with hardened and chrome-plated piston rods. Delivers reliable track tension, superior durability, and long service life for heavy-duty undercarriage systems.
| Piston Rod | 40Cr / 42CrMo (Hard Chrome Plated) |
|---|---|
| Cylinder Body | Q345 / 45# Steel / 40Cr |
| Return Spring | 60Si2Mn / 65Mn Spring Steel |
| Cylinder Head / End Cap | 45# Steel / Cast Steel |
| Grease Nipple & Fittings | Carbon Steel (Zinc Plated) / Stainless Steel |
| Colors | Black or yellow or customized |
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Kinton Parts is trusted by professionals worldwide for delivering high-quality parts for excavators, bulldozers, and other construction machinery—with guaranteed performance and durability.
The track adjuster assembly, also known as a track tensioner, is a vital part of the Komatsu D155A-3 bulldozer’s undercarriage system. Its primary function is to maintain the correct tension in the track chain, ensuring smooth track movement, stable traction, and reduced component wear during heavy-duty operation.
For a large crawler dozer like the Komatsu D155A-3, which works in tough environments such as mining, quarrying, and large-scale earthmoving, the track adjuster must withstand high pressure, vibration, and debris exposure. Our assemblies are designed and manufactured to meet OEM-level performance, delivering long service life, reliability, and precise fitment for your Komatsu undercarriage system.
Material Composition and Construction
Our D155A-3 track adjuster assembly is built from high-strength alloy steel, incorporating advanced heat treatment and sealing technology to ensure maximum durability under extreme working conditions.
Key components include:
- Cylinder Body: Forged from seamless alloy steel tubing, CNC-machined for perfect roundness and strength.
- Piston Rod: Made from 40Cr or 42CrMo steel, induction hardened and chrome plated to resist abrasion and corrosion.
- Spring Assembly: Formed from high-elasticity alloy spring steel, capable of maintaining consistent pressure and absorbing recoil shock.
- Seal Kit: Uses high-temperature and high-pressure-resistant sealing rings to prevent hydraulic oil leakage and contamination.
Each assembly is precision-engineered to maintain smooth movement and hydraulic sealing even after thousands of compression and extension cycles.
Material Composition and Construction
The Komatsu D155A-3 track adjuster works by using hydraulic pressure and mechanical spring force to maintain proper track tension.
- When hydraulic oil is injected into the cylinder, the piston moves forward, pushing the idler wheel and tightening the track chain.
- As the machine operates over rough terrain, the recoil spring compresses, absorbing shocks and preventing excessive force on the track links.
- When the track becomes too tight, the spring and cylinder balance out the pressure automatically.
This system not only reduces the chance of track derailment or chain jumping, but also significantly prolongs the service life of related components such as the idler, sprocket, and track links.
Manufacturing Process
Each track adjuster assembly undergoes a rigorous multi-step production process to guarantee consistent quality and performance:
- Forging & Machining – Cylinder and rod are precisely forged and CNC-machined to ensure dimensional accuracy.
- Heat Treatment – Increases tensile strength and fatigue resistance for both the spring and metal components.
- Polishing & Chrome Plating – Provides excellent corrosion resistance and smooth piston motion.
- Seal Installation & Pressure Testing – Ensures complete sealing under dynamic hydraulic pressure.
- Painting & Packing – Anti-corrosion coating and rust-proof packaging ensure safe international transport.
Before shipment, each adjuster assembly is pressure-tested and cycle-tested to ensure zero leakage and stable tension control under load.
Compatibility and OEM Reference
This track adjuster assembly is fully compatible with Komatsu D155A-3 bulldozers, as well as other equivalent D155 variants using the same undercarriage structure.
We can also provide OEM customization — just provide drawings, dimensions, or OEM part codes for precise matching. If you require tensioning assemblies for other products, please feel free to contact us.
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| KOMATSU | D20 | D21 | D31 | D37 | D39 | D41 | D50 | D53 |
| D55 | D57 | D60 | D61 | D65 | D68 | D75 | D80 | |
| D85 | D85A-12 | D87 | D90 | D95 | D135 | D155 | D155A-1 | |
| D155A-2 | D155A-3 | D155A-5 | D155AX-6 | D155AX-7 | D275 | D275A-2 | D275AX-5 | |
| D275AX-5EO | D355 | D355A-3 | D375A-2 | D375A-3 | D375A-5 | D375A-6 | D375A-8 | |
| D475A-2 | D475A-3 | D475A-5 | D475A-8 | D475A-8EO | D575A | D575A-2 | D575A-3 | |
| D65EX-12 | D65PX-12 | D61EX-15 | D61PX-15 | D61EX-24 | D61PX-24 | D37EX-21 | D37PX-21 | |
| D39EX-21 | D39PX-21 | D39EX-24 | D39PX-24 | D51EX-22 | D51PX-22 | D51EX-24 | D51PX-24 | |
| D85EX-15E0 | D85PX-15E0 | D85EX-18 | D85PX-18 | D155AX-8 | D155AXi-8 | D375A-8EO | D475A-8EO | |
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Key Advantages
- Manufactured from forged alloy steel with precision machining.
- Heavy-duty recoil spring for consistent tension control.
- Chrome-plated piston rod ensures smooth operation and corrosion resistance.
- High-quality seal kits prevent oil leakage and contamination.
- Fully tested for pressure resistance, recoil performance, and dimensional accuracy.
- OEM-compatible with Komatsu D155A-3 and similar bulldozer models.
Quality Control & Testing
Every D155A-3 track adjuster assembly passes strict factory inspections, including:
- Hydraulic pressure tests (up to twice the working pressure)
- Dynamic seal leakage tests
- Spring compression and rebound performance tests
- Hardness, dimension, and surface roughness inspection
Only components that meet our full quality checklist are approved for packing and shipment.
Why Choose Our Track Adjuster Assemblies
- Over 15 years of expertise in bulldozer undercarriage components.
- ISO-certified production with full traceability.
- Customizable designs for OEM or aftermarket compatibility.
- Competitive pricing without compromising material or build quality.
- Global logistics support and corrosion-resistant export packaging.
The Komatsu D155A-3 Track Adjuster Assembly delivers the perfect balance of hydraulic precision, mechanical durability, and shock absorption for demanding earthmoving and mining applications. Built to OEM standards with advanced heat treatment and sealing technology, it ensures your bulldozer’s track system runs efficiently, safely, and with reduced maintenance costs.
Choose our high-performance track adjuster to keep your D155A-3 bulldozer working smoothly across any terrain — from deep mud to rocky slopes — with long-term reliability and superior value.
SHIPPING & DELIVERY
At Kinton Parts, we ensure reliable, worldwide shipping of parts for excavators, bulldozers, and a full range of construction machines—safe, fast, and secure.
All products are securely packed using high-quality export cartons, reinforced wooden cases, or industry-standard palletized packaging to ensure maximum protection during transit and smooth handling during unloading.
Standard orders are typically shipped within 3–5 working days, while large or customized orders are usually dispatched within 7–20 days, depending on volume and production requirements.
We offer flexible global shipping options, including:
- International sea freight for cost-effective bulk transport
- Air freight for urgent orders
- Courier delivery (DHL, FedEx, UPS) for small-volume or sample shipments
Our logistics team manages every shipment carefully, providing real-time updates and tracking information until your order arrives safely at your destination.
Need assistance choosing the best shipping method for your location and timeline? Contact our team — we’ll help you plan a smooth delivery experience.
FAQ
Q: What are your main products?
A: We supply a full range of undercarriage and wear parts for excavators, bulldozers, and other heavy equipment. Our product line includes: Track rollers, carrier rollers, front idlers, sprockets, segments, track shoes, track chains, bolt and nuts, pins and bushings, bucket teeth and adaptors, filters, seal kits, swing bearing, and hydraulic cylinder—plus other essential replacement parts.
Q: Which countries do you export to?
A: Kinton Parts exports to over 60 countries worldwide, including:
USA, Canada, UK, Germany, Russia, UAE, Indonesia, Malaysia, Thailand, India, Pakistan, Bangladesh, Sri Lanka, South Africa, Colombia, Peru, and many others.
Q: Can I order a sample?
A: Yes, we accept trial orders. For parts in stock, samples can be shipped quickly. If you have technical drawings or existing samples, we also support customized production and mold development.
Q: How can I track my order after shipping?
A: Once your order is shipped, we will provide you with all necessary tracking information based on the shipping method. For express deliveries, you’ll receive a tracking number to follow the shipment online. For air or sea freight, we’ll send you the relevant documents such as the airway bill (AWB) or bill of lading (B/L), along with the packing list and commercial invoice to help with tracking and customs clearance.
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Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
