OEM Bucket Cylinder for Doosan Excavators
High-durability bucket cylinder engineered for Doosan excavators. Forged from premium alloy steel and fitted with precision-machined ends, chrome-plated rod, and reinforced sealing system. Designed to deliver stable force during continuous excavation and bucket actuation cycles in earthmoving, quarrying, or construction sites.
| 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 driving force behind every digging and dumping operation in your Doosan excavator. Whether you’re operating a DX220, DH280, or DX300LC, this hydraulic cylinder:
- Controls curling and dumping of the bucket
- Enables smooth and repeatable material loading
- Withstands reverse hydraulic pressure during breakout
- Balances force between boom and arm under complex loads
Frequent motion, force direction changes, and harsh materials demand a cylinder that maintains alignment, pressure integrity, and sealing across every cycle.
Cylinder Construction & Materials
We manufacture each Doosan bucket cylinder using carefully selected alloy steel, forged and machined to match OEM standards. Key features include:
- Rod Material: 42CrMo alloy steel, chrome-plated for corrosion resistance and wear life
- Cylinder Tube: Q345B or ST52 seamless tube, honed to < Ra 0.2μm for low friction and seal protection
- End Connections: CNC-machined clevis, eye, or flange ends—fully welded and tested
- Bushings: Hardened steel with optional lubrication grooves for long service life
- Optional: Custom mounting ends or stroke length based on machine variant
All machining tolerances are held to extremely tight tolerances to ensure a tight fit with the pins and bushings.
Cross-Section Diagram
You can see from the cross-section of the hydraulic cylinder that:
- Seal stack location and types
- Internal wear rings and support rings
- Rod and piston structural relation
- Fluid channel alignment
This transparency allows buyers or maintenance engineers to understand how each part contributes to performance and serviceability.
This diagram helps visualize how the rod, piston, barrel, and seals interact under pressure, showing key wear zones and sealing points for effective maintenance planning.
Cylinder Manufacturing Process
Showcasing these three key manufacturing stages can help build trust and transparency：
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 to withstand 1.5× working pressure and checked for leaks, stroke alignment, and valve performance. Final products are sealed and packed in export-grade wooden crates.
Finished products are sprayed with anti-rust coating and packed in export-grade wooden crates.
OEM Undercarriage Parts for Doosan Excavator
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| DOOSAN | DH30 | DH35 | DH50 | DH55 | DH60 | DH60-7 | DH80 | DH130 |
| DH130-2 | DH150LC-7 | DH150W-7 | DH170 | DH180 | DH200W | DH210W-7 | DH220LC | |
| DH225LC | DH220LC-7 | DH225LC-7 | DH280LC | DH300-5 | DH300-7 | DH300LC-7 | DH320 | |
| DH370LC-7 | DH400LC-7 | DH450 | DX55 | DX60 | DX80 | DX140LC | DX160LC | |
| DX200A | DX225LC | DX260LC | DX300LCA | DX340LC | DX420LC | DX500LC | DX800LC | |
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Compatible Doosan Models
This bucket cylinder is suitable for the following models and their variants:
Doosan DX220 / DX225 / DX260 / DX300 / DX340 / DX420
DH220 / DH225LC / DH280 / DH300 / DH370-7
Other models upon request
OEM reference codes available upon inquiry—just send us your old cylinder casting code, part number, or drawing.
Maintenance Tips for Doosan Bucket Cylinders
- Wipe down and inspect the rod surface every 300–500 hours to prevent scratch or seal damage
- Replace seal kits when noticing bucket drift, jerky motion, or visible oil leakage
- Keep pivot bushings greased, especially in dusty environments
- Retract the rod when idle for long periods to avoid rust buildup on exposed surface
- Avoid excessive force or impact when bucket is fully extended
FAQ – Doosan Bucket Cylinders
Q: Can I replace just the seal kit instead of the whole cylinder?
A: Yes. We offer separate seal kits as well as full assemblies. If the barrel and rod are intact, resealing is a cost-effective option.
Q: What if my model isn’t listed?
A: Send us your machine serial number, cylinder drawing, or photos—we'll match or customize within 12 hours.
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.
