PC400 PC450 Excavator Spare Part Track Adjuster for Komatsu
Premium-quality track adjuster assembly for Komatsu PC400 and PC450 excavators, featuring hardened steel, chrome-plated piston rod, and high-pressure seals. Delivers stable track tension, longer undercarriage life, and OEM-level durability.
| 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 for the Komatsu PC400 and PC450 excavators is a critical component designed to maintain the optimal track tension throughout demanding earthmoving operations. Acting as the connecting system between the idler and the track frame, it ensures the proper alignment and tension of the track chain, allowing the excavator to move smoothly, efficiently, and safely on uneven terrain.
Our PC400/PC450 track adjuster assemblies are engineered for high hydraulic pressure resistance, superior wear protection, and long-term sealing performance. Built according to OEM specifications and upgraded with modern heat-treatment and sealing technologies, they provide the reliability and durability required for continuous work in quarrying, mining, and construction environments.
Material & Construction
Every unit of our Komatsu PC400/PC450 track adjuster is produced using premium alloy steel materials and advanced manufacturing processes to guarantee structural integrity and performance consistency under extreme conditions.
Core Components:
- Cylinder Housing: Manufactured from seamless high-strength alloy steel tube, CNC-machined for perfect roundness and smooth internal finish to minimize friction.
- Piston Rod: Made from 42CrMo steel, hardened and precision-ground before chrome plating to resist corrosion and scoring during operation.
- Recoil Spring Assembly: High-tensile spring steel provides strong recoil capability to absorb impact and maintain stable track tension over time.
- Seal Kit: Equipped with imported high-pressure oil seals to ensure complete hydraulic sealing and prevent oil leakage even under high loads or temperature variations.
This combination of metallurgy and surface treatment ensures exceptional fatigue resistance, pressure tolerance, and anti-rust performance, making the assembly suitable for continuous excavation operations in wet, dusty, or rocky environments.
Function and Working Principle
The track adjuster assembly regulates the track chain tension through the combined action of hydraulic force and mechanical spring pressure.
When grease or hydraulic fluid is injected into the adjuster cylinder, the piston rod extends outward, pushing the idler wheel forward to tighten the track chain. During heavy working conditions, such as digging or turning on rocky ground, the recoil spring automatically absorbs and releases impact forces to prevent over-tightening and protect other undercarriage parts such as track links, rollers, and sprockets.
If excessive tension is detected, the internal hydraulic system allows grease to be released slightly, maintaining the ideal working tension range. This self-regulating design ensures smoother track movement, improved operator comfort, and longer service life for the entire undercarriage system.
Manufacturing Process
Each track adjuster assembly undergoes a multi-stage production and testing cycle to ensure the highest quality standards:
- Raw Material Selection – Alloy steel and spring materials are carefully chosen for chemical composition and tensile strength.
- Precision Machining – CNC machining ensures consistent dimensions and perfect piston-to-cylinder fit.
- Heat Treatment – Components are quenched and tempered to enhance hardness and toughness.
- Surface Finishing – Chrome plating and anti-corrosion coating provide long-lasting rust protection.
- Assembly & Sealing – Professional installation of seals under clean-room conditions.
- Testing & Calibration – Each unit is pressure tested and checked for leakage, spring compression, and piston travel consistency.
This manufacturing rigor ensures every Komatsu PC400/PC450 track adjuster delivers OEM-level precision and reliability from the first hour of use.
Compatibility & Replacement References
The adjuster assembly fits the Komatsu PC400, PC400-6, PC400-7, PC450-6, and PC450-7 series excavators.
It can be directly installed as a replacement for OEM units without modification.
If you require other variants or models, we can customize track adjuster assemblies according to specific machine dimensions or OEM codes.
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| KOMATSU-PC | PC20 | PC30-5 | PC30-6 | PC30-7 | PC30-8 | PC35 | PC40 | PC45 |
| PC50 | PC55 | PC40-5 | PC40-6 | PC40-7 | PC50 | PC55 | PC60-1 | |
| PC60-3 | PC60-5 | PC60-6 | PC60-7 | PC75 | PC100-1 | PC100-3 | PC100-5 | |
| PC100-6 | PC100-7 | PC120-3 | PC120-5 | PC120-6 | PC120-7 | PC150 | PC200-1 | |
| PC200-3 | PC200-5 | PC200-6 | PC200-7 | PC200-8 | PC220-1 | PC220-3 | PC220-5 | |
| PC220-6 | PC220-7 | PC220-8 | PC200LC-3 | PC200LC-5 | PC200LC-6 | PC200LC-7 | PC200LC-8 | |
| PC240 | PC300-1 | PC300-5 | PC300-6 | PC300-7 | PC300LC | PC300LC-5 | PC300LC-6 | |
| PC300LC-7 | PC360-5 | PC360-6 | PC360-7 | PC360LC-5 | PC360LC-6 | PC360LC-7 | PC360LC-8 | |
| PC400-1 | PC400-3 | PC400-5 | PC400-6 | PC400-7 | PC400LC-1 | PC400LC-3 | PC400LC-5 | |
| PC400LC-6 | PC400LC-7 | PC450-5 | PC450-6 | PC450-7 | PC450LC-5 | PC450LC-6 | PC450LC-7 | |
| PC650 | PC750 | PC800 | PC350 | |||||
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Key Features & Advantages
- OEM-Standard Design: Fully compatible with Komatsu PC400 and PC450 excavators.
- Forged Cylinder and Hardened Rod: Ensures durability under high pressure and shock load.
- Superior Sealing System: Prevents hydraulic leakage and contamination.
- Enhanced Spring Performance: Provides stable recoil force and consistent track tension.
- Anti-Corrosion Surface: Chrome-plated rod and painted body for longer service life.
- Easy Installation and Maintenance: Ready-to-fit unit compatible with factory grease fittings.
This robust design improves undercarriage balance and minimizes downtime, ensuring reliable performance in all soil conditions.
Quality Control
All assemblies are tested under simulated field conditions to ensure compliance with strict performance standards.
Tests include:
- Pressure endurance (tested at 1.5× working pressure)
- Spring load and compression ratio testing
- Seal leakage verification after 10,000 cycles
- Dimensional tolerance and surface roughness checks
Each product is serialized for traceability, ensuring consistent quality and accountability in every shipment.
Maintenance Recommendations
To maintain proper function and extend lifespan:
- Check track tension periodically and adjust grease volume as needed.
- Clean grease nipple and protective boot regularly to prevent debris intrusion.
- Do not overfill the adjuster — excessive pressure may damage seals.
- Inspect for oil leaks or abnormal piston travel. Replace seals or assemblies if necessary.
- Store spare assemblies in dry, shaded areas to prevent corrosion.
Routine maintenance can significantly reduce wear on other undercarriage components and improve the overall operating efficiency of your excavator.
Why Choose Us
We specialize in the manufacture and supply of complete undercarriage systems for Komatsu and other leading brands. With over 15 years of engineering experience, we deliver:
- High-precision, OEM-quality adjuster assemblies
- Strict material and performance testing before shipment
- Customization services for special machine requirements
- Reliable after-sales support and technical assistance
Our track adjusters are trusted by dealers, contractors, and service centers worldwide for their long lifespan, stable performance, and precise fitting.
The Komatsu PC400 / PC450 Track Adjuster Assembly combines mechanical strength and hydraulic accuracy to deliver consistent track tension in the harshest operating environments. Built from premium materials and tested to exceed OEM performance, it ensures smooth machine movement, protects your undercarriage components, and reduces downtime over the long term.
Investing in a high-quality adjuster assembly means maintaining peak performance, lower maintenance costs, and a more productive excavator fleet.
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.
