PC300-5 Excavator Track Adjuster Assembly Parts for Komatsu
Our PC300-5 track adjuster assembly is engineered to maintain optimal track tension under demanding jobsite conditions. Featuring a heavy-duty recoil spring and precision-machined grease cylinder, it helps your Komatsu excavator achieve stable movement, extended undercarriage life, and reduced maintenance downtime.
| 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 on the Komatsu PC300-5 is a vital undercarriage component that maintains the correct tension of the track chain by exerting constant pressure on the idler. Without proper tension, tracks may derail, cause unstable operation, or accelerate undercarriage wear.
This system combines a grease chamber, recoil spring, and tensioning piston, ensuring smooth track operation during forward or reverse movement. It also absorbs impact loads from rough terrain, reducing vibrations and structural stress on the machine.
Key Design Features
The internal structure of our PC300-5 adjuster assembly includes:
- High-capacity recoil spring group with optimal deflection rate
- Oil seal group and dust rings for sealing integrity
- Grease port system for efficient pressure adjustment
- Reinforced front yoke & collar to withstand axial loads during machine travel
Reinforced Structure & Durable Materials
Our PC300-5 adjuster is manufactured using top-grade materials and a strict multi-step process:
- Cylinder & Piston Rod: Forged from 45# or 40Cr steel, CNC-machined for tight tolerances and surface smoothness
- Recoil Spring: Made from high-elastic 60Si2Mn spring steel, heat-treated for fatigue resistance under repetitive shock loads
- Heat-Treated Surface: Rods hardened to HRC 50–55, boosting abrasion resistance in dusty, rocky conditions
- Grease Adjuster System: Grease-filled cylinder enables easy field tension adjustment without machine teardown
- Protective Coating: Anti-rust primer and paint layer help resist corrosion, even in wet and muddy environments
OEM Undercarriage Parts for Komatsu Excavator
| 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.
Compatible Models & Part Numbers
This adjuster is designed for use with:
Komatsu PC300-5 excavator
May also fit other models such as PC300-3, PC300-6, or PC350-5 (depending on configuration)
Common OEM Reference Numbers (verify with machine parts manual):
- 207-30-00121
- 207-30-00130
- 207-30-00120
If you're unsure about fitment, send us your excavator’s model number, serial number, or a photo of your original assembly—we will confirm compatibility quickly.
Why Choose Our PC300-5 Track Adjuster Assembly?
- Exact OEM Dimensions – Direct replacement without modification
- High Recoil Strength – Maintains tension during vibration, slope travel, or high load
- Grease-Adjustable Design – Quick field adjustment with a grease gun
- Enhanced Corrosion Protection – Anti-rust paint or zinc coating applied
- Photo & Video Confirmation – We provide inspection visuals before shipment
- OEM/ODM Options – Custom logo or packaging services available
Pre-Shipment Support
Before delivery, we provide:
- Photos & videos of the actual product
- Packing confirmation
- Inspection checklist
This helps ensure you know exactly what you’re receiving—no surprises, no delays.
Application Scenarios
This adjuster is built to support the Komatsu PC300-5 under the following conditions:
- Rock excavation and trenching on uneven terrain
- High-impact quarry operations or demolition work
- Long-duration earthmoving jobs on clay, gravel, or sand
- Forestry and mining applications requiring reliable traction and control
Its grease-tensioning design allows for on-site adjustments, minimizing downtime and enhancing machine longevity.
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.
