Komatsu Excavators Use Bucket Cylinder for Sale
High-strength bucket cylinder built for Komatsu crawler excavators. Forged from premium alloy steel, CNC-machined for fitment precision, and assembled with leak-resistant seal kits. Engineered for long-term use in high-frequency digging, lifting, and trenching tasks.
| Cylinder Tube | Q345 / ST52 / 27SiMn / 20# Steel |
|---|---|
| Piston Rod | 45# / 40Cr / 42CrMo (Hard Chrome Plated) |
| Piston | Ductile Iron / Forged Steel (45# / 20Cr) |
| Cylinder Head | Q345 / 45# Steel / Cast Steel |
| Seals | Polyurethane (PU), NBR, FKM |
| Guide Bush | Bronze Alloy / Composite Materials |
| Ports & Fittings | Zinc-Plated Carbon Steel / Stainless Steel |
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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 bucket cylinder is the final power actuator in the Komatsu excavator’s front working group. It controls the tilting and curling of the bucket, allowing operators to perform scooping, digging, and dumping actions with accuracy and force.
On models such as PC200 / PC300 / PC360, the bucket cylinder endures continuous shock loads, material backpressure, and rapid directional change—especially in environments involving rock breaking, foundation excavation, or wet soil handling. A well-built cylinder ensures full transfer of hydraulic force, precise motion control, and long service life.
Materials & Mechanical Durability
Each Komatsu bucket cylinder is forged from Q345B or 42CrMo steel, selected for its balance of yield strength and wear resistance. Key features include:
- Induction-hardened chrome-plated piston rod
- Thick-walled cylinder barrel for internal pressure stability
- Precision-machined rod ends and pin holes
- High-pressure welding and seal grooves
The inner bore is honed to mirror finish (< Ra 0.2μm), minimizing seal friction and improving oil film retention.
Sealing Performance Under Harsh Conditions
Our cylinders use multi-stage sealing systems with components sourced from leading brands like NOK, Hallite, and Parker, designed to withstand:
- High hydraulic pressure surges
- Dusty, muddy, or corrosive environments
- Extended operation cycles without leakage
- Typical sealing structure includes:
- Rod seals
- Dust wipers
- Wear rings
- Buffer rings and O-rings
This sectional diagram highlights the internal components of a standard hydraulic cylinder, including piston, rod, barrel, and seal stack. It helps buyers and technicians understand wear points, hydraulic flow paths, and maintenance considerations.
Cylinder Manufacturing Process
Each Komatsu bucket cylinder is manufactured through a controlled, multi-step process:
Rod Polishing & Surface Prep
The piston rod is ground and polished to achieve a mirror-smooth surface, ready for hard chrome plating. This step reduces wear on seals and ensures long-lasting hydraulic performance.
Assembly & Sealing
In a cleanroom assembly area, the barrel, piston, rod, and end caps are fitted and torqued to spec. Seal kits are carefully installed to prevent fluid loss and contamination.
Pressure Testing & Export Packaging
Each cylinder is tested at up to 150% of rated pressure to verify sealing integrity. Final units are cleaned, oil-coated, and securely packed in wooden crates for international shipping.
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 Hitachi Models
This bucket cylinder is compatible with a wide range of Komatsu excavators, including:
- PC200 / PC210 / PC220 / PC240 / PC270
- PC300 / PC360 / PC400 / PC450 / PC490
Custom specifications available on request
Don’t know your part number? Just send us your machine model, cylinder drawing, or serial plate photo, and our team will confirm compatibility within 12 hours.
Maintenance Tips for Bucket Cylinder Longevity
- Regularly grease pivot points and inspect for rod scratches
- Replace bushings and seals proactively during cylinder service
- Monitor for signs of internal leakage or reduced pushing power
- Avoid sudden arm retraction under full load to reduce fatigue stress
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.
