Stick Arm Cylinder fit Volvo Excavators
Heavy-duty arm cylinder engineered for Volvo crawler excavators. Constructed with chrome-plated 42CrMo piston rod, honed steel barrel, and multi-stage sealing system. Delivers stable, efficient force transfer between the boom and arm during trenching, digging, and reach operations.
| 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 arm cylinder, also referred to as the stick cylinder, controls the reach and pulling motion of the arm in a Volvo excavator. Whether in EC210, EC240, or EC360LC models, it plays a vital role in:
- Controlling trench depth and wall accuracy
- Applying forward reach and digging force
- Absorbing backward shock during breakout
- Supporting the synchronized movement between boom and bucket
In high-duty jobs like utility trenching, quarry excavation, or slope forming, the arm cylinder must maintain tight geometry, reliable sealing, and shock resistance throughout repeated pressure cycles.
Construction Materials & Engineering
Built for durability and precision, our arm cylinders meet or exceed OEM specifications. Key structural elements include:
- Rod Material: Induction-hardened 42CrMo alloy steel, chrome-plated (25–30μm) for corrosion and seal wear resistance
- Barrel: Seamless ST52 / Q345B / 27SiMn tube, honed internally (< Ra 0.2μm) for frictionless seal travel
- End Mounts & Pistons: CNC-machined, welded using robotic processes for high weld strength and concentricity
- Bore Tolerances: Maintained within ±0.05mm to preserve sealing contact and reduce energy loss
These materials ensure the cylinder performs smoothly under pressure surges and long-duration digging operations.
Cross-Section Diagram
Showcase our standard cross-section diagram to illustrate internal structure and working logic of the Volvo arm cylinder, including：
- Seal arrangement
- Fluid chamber paths
- Rod and piston connection
- Structural reinforcement zones
Helps customers and technicians understand component longevity 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.
Manufacturing Process Overview
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.
OEM Undercarriage Parts for Volvo Excavator
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| VOLVO | EC55 | EC140 | EC160 | EC180 | EC210 | EC210B | EC210CL | EC240 |
| EC240B | EC240CL | EC290 | EC290B | EC290CL | EC300 | EC300B | EC300DL | |
| EC330 | EC360 | EC360B | EC380DL | EC460 | EC460B | EC480DL | EC700B | |
| EC700CL | EC950E | EC750E | EC480EL | EC380EL | EC300EL | EC250EL | EC220EL | |
| EC200D | EC210D | EC140D | EC160D | EC180D | EC250D | EC300D | EC380D | |
| EC480D | EC750D | EC950D | EC700D | EC290LC | EC240LC | EC210LC | EC360LC | |
| EC460LC | EC700LC | EC950LC | EC480LC | EC300LC | EC250LC | EC220LC | EC140LC | |
| EC210BLC | EC240BLC | EC290BLC | EC360BLC | EC460BLC | EC700BLC | EC750EL | EC380FL | |
| EC300FL | EC250FL | EC220FL | EC480FL | EC950FL | EC160EL | EC180EL | EC140EL | |
| EC140BLC | EC160BLC | EC180BLC | EC290EL | EC360EL | EC460EL | EC700EL | ||
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Compatible Doosan Models
This arm cylinder fits a wide range of Volvo crawler excavators, including:
- EC140 / EC160 / EC180 / EC210 / EC240 / EC250
- EC290 / EC300 / EC350 / EC360 / EC380 / EC460
Other models upon request
Don’t see your model? Just send us your casting number, OEM reference, or cylinder drawing — we’ll confirm compatibility within 12 hours.
Maintenance Tips for Arm Cylinders
- Wipe and inspect the rod surface every 300–500 hours—look for scratches or corrosion
- Check for seal leakage, arm drift, or slow operation, which may indicate piston or rod seal wear
- Lubricate bushings and pivot points regularly to reduce cylinder side load
- Store cylinders with rod fully retracted to minimize oxidation during long idle periods
- Avoid operating at full extension under extreme load conditions
FAQ – Volvo Arm Cylinder
Q: Are your cylinders interchangeable with original Volvo parts?
A: Yes, all dimensions match OEM specs. We can also match based on drawings or machine serial numbers.
Q: Can I get a full set of cylinders for my excavator?
A: Absolutely. We supply boom, arm, and bucket cylinders as a complete kit or separately.
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.
