Excavators Bucket Arm Link Rod fit Komatsu PC300-3
Heavy-duty forged link rod tailored for Komatsu PC300-3 excavators. Crafted from high-strength structural steel and precision CNC-machined to ensure accurate pin fit and optimal hydraulic alignment. Finished with anti-corrosion treatment for long-lasting durability. Built to deliver consistent performance under intense loads, making it ideal for heavy excavation, rock handling, and mining applications where structural integrity and wear resistance are critical.
| Colors | Black or yellow or customized |
|---|---|
| Surface Hardness | HRC52-58 |
| Material | Q235B, Q345B |
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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.
Key Role in the PC300-3 Link Rod Linkage System
In the Komatsu PC300-3, a robust 30-ton class excavator, the link rod serves as the critical connector between the bucket cylinder and the bucket assembly. It plays a central role in transmitting hydraulic force into mechanical motion, ensuring smooth and controlled bucket articulation.
For machines like the PC300-3, which are often used in quarrying, mass excavation, and structural demolition, the link rod must maintain tight joint geometry under heavy dynamic loads. Poor alignment or excessive clearance in this part can lead to hydraulic instability, pin wear, and early failure of bushings or seals. That’s why high machining precision and material strength are essential for this component.
Forged Steel Construction for Compact Efficiency
Each PC300-3 link rod is made from Q345B or Q235B structural steel, depending on jobsite needs and stress exposure. The Q345B option is widely used due to its:
- High tensile and yield strength
- Excellent impact toughness
- Superior fatigue resistance under repeated heavy loading
The forging process improves the internal steel grain structure, removes casting-related porosity, and increases resistance to shear force and cracking. This makes it especially suitable for tough work like rock loading, foundation trenching, and mining excavation.
CNC Machining & Anti-Corrosion Surface Treatment
After forging, all critical points—especially the pin holes, bushing seats, and end surfaces—are precisely CNC machined to extremely tight tolerances. This ensures a snug fit with OEM bucket pins and prevents any lateral movement during high-torque operations.
The surface is then treated using one of two industry-proven coatings:
- Shot-blasted + industrial primer for general use
- E-coating (electrophoretic coating) for wet, corrosive, or marine environments
This dual protection strategy improves the rod’s durability in muddy, abrasive, or chemical-exposed worksites, preventing corrosion, surface flaking, and premature failure.
Pre-Machining Storage
After forging and rough shaping, each link rod is properly stored in preparation for precision machining and heat treatment. These solid, semi-finished parts are neatly arranged in batches — showcasing both our forging strength and our ability to manage stable, large-scale production.
Export-Ready Packaging
After completing all machining, quality checks, and anti-corrosion treatment, each finished link rod is carefully packed using reinforced pallets or wooden crates. This ensures safe handling and long-distance transport. Every package is clearly labeled for easy tracking, and logo or barcode customization is available upon request.
Compatibility
This link rod is fully compatible with:
- Komatsu PC300-3 / PC300LC-3 / PC300HD-3
- Early-generation PC320 models with similar linkage geometry
Need to confirm fitment? Just send us your casting number, machine serial, or linkage dimensions, and we’ll provide compatibility confirmation within 12 hours.
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.
Real-World Use: Built for Harsh Work Conditions
The PC300-3 is commonly deployed in:
- Limestone and granite quarries
- Large-scale earthmoving and dam projects
- Bridge foundation excavation
- Demolition and material rehandling
In these high-impact applications, the link rod must endure cyclical shock loads, torsional stress, and side-load prying forces. Our link rods are engineered to resist:
- Bore elongation
- Cracking or deflection
- Hydraulic misalignment under peak pressure
Maintenance Advice for Long-Term Use
To extend the working life of your PC300-3 link rod:
- Lubricate pin joints every 250–300 operating hours
- Replace bushings and pins together with the link rod to maintain system balance
- Inspect regularly for bore distortion, scoring, or corrosion spots
- Avoid excessive side-force or unbalanced bucket movements during operation
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.
