Heavy Duty Hydraulic Boom Cylinder for Volvo Excavators
High-strength boom cylinder engineered for Volvo excavators. Features include a chrome-plated 42CrMo piston rod, honed steel tube, and multi-stage sealing system. Delivers smooth lifting, stability, and long-term hydraulic performance across demanding excavation and loading 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 boom cylinder is one of the most critical hydraulic components on any Volvo crawler excavator. It powers the upward and downward movement of the boom, lifting the arm and bucket to clear trenches, load dump trucks, or work across slopes and uneven terrain.
In machines such as the EC210, EC240, and EC360LC, this cylinder:
- Bears a significant portion of the machine’s front-end lifting load
- Stabilizes the boom under pressure from arm and bucket motion
- Enables smooth elevation even during full-bucket lifts or deep trenching
- Must withstand repeated high-pressure cycles, sudden movements, and heavy impact loading
Any weakness in the boom cylinder can result in lifting lag, hydraulic drift, or even structural imbalance during operation.
Construction Material & Engineering
Each boom cylinder is built with strict attention to strength, alignment, and long-term pressure retention. Key specifications include:
- Piston Rod: 42CrMo alloy steel, chrome-plated ≥25μm, surface finish ≤Ra 0.2μm
- Tube: ST52 or Q345B seamless steel, precision honed to reduce friction and improve seal life
- Mounts and Gland Ends: CNC-machined for concentricity and force uniformity
- Welding: Performed by robotic MIG welders, then non-destructive tested
- Bore Tolerance: Controlled within ±0.05mm for proper piston and seal function
These features help ensure the cylinder handles heavy dynamic forces without deformation, scoring, or seal breakdown.
Internal Structure Overview
A detailed cross-section diagram is provided to illustrate:
- Seal arrangement: rod seal, piston seal, buffer ring, wiper
- Rod and piston interaction
- Hydraulic oil flow channels
- Wear ring positions for guidance under lateral force
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.
OEM Undercarriage Parts for Volvo Excavator
This boom cylinder fits a wide range of Volvo crawler excavators:
| 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 | ||
Need a match? Just send us your OEM number, casting code, or technical drawing, and we’ll confirm compatibility within 12 hours.
Maintenance Tips for Boom Cylinders
- Clean the piston rod regularly to prevent dust or rust buildup
- Check for hydraulic drift, vibration, or sagging boom, which may indicate internal wear
- Keep boom pivot pins and bushings well-lubricated to reduce shock loads
- Avoid overloading during max extension to prevent barrel stress
- During storage, retract the boom fully to protect the exposed rod from weathering
FAQ – Volvo Cylinder
Q: Can you match original Volvo cylinder specifications?
A: Yes, our cylinders are fully interchangeable with Volvo OEM parts. We match based on drawings, serial numbers, or part codes.
Q: Do you offer full cylinder sets for Volvo excavators?
A: Absolutely. We offer boom, arm, and bucket cylinders as a complete set or individually.
Q: Can I customize stroke length or port type?
A: Yes. We support special requests for stroke, thread, port position, and mounting style.
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.
