Arm Cylinder 31Y1-30120 31Y1-28631 Boom Cylinder 31NA-60111 for R290LC-9 R210LC-9 R360LC-7 Excavator

The 9292427 9292425 are part numbers of the arm, 31NA-60111 is part number of the boom hydraulic cylinders respectively for the R290LC-9 R210LC-9 R360LC-7 Excavator.

Specification

Construction Material:

Piston Rod: Crafted from 40Cr steel, heat - treated via hardening and tempering, then hard chrome - plated and mirror - polished. This boosts surface hardness, wear resistance, reduces friction, and ensures smooth, long - lasting operation.

Cylinder Barrel: Made of 25Mn steel, tempered to avoid deformation. It has a higher bearing capacity than common C45 or C20 steel, ensuring durability under high - pressure hydraulic forces.

Barrel/Rod End & Head: Forged from high - strength steel, these parts offer superior strength and toughness to endure operational stress and shock.

Seal Kits: Premium seal kits from renowned brands like NOK or SKF prevent hydraulic fluid leaks, maintain system pressure, and optimize cylinder performance.

Company Information

With over 16 years of experience in hydraulic cylinder manufacturing, GLPARTS has exported products to more than 100 countries worldwide, including the United States, Germany, Australia, and the Middle East. Backed by a skilled team of engineers and a responsive sales force, we provide comprehensive support—before, during, and after the sale—to ensure your satisfaction every step of the way.

Why Choose Us

OEM/ODM Capabilities
Competitive Pricing & Bulk Discounts
Fast Shipping & Customs Clearance Support

Other Products

Final Drive / Travel Motor
Swing Motor & Swing Gearbox
Hydraulic Pump
Control Valves
Engine Parts
Seal Kits
Undercarriage Parts
Electric Parts
Cab & Body Components

More Cylinders We Can Provide

Guangzhou Guoli Engineering Machinery Co., Ltd., located in GuangZhou city, benefits from a large construction machinery parts market and convenient transportation access. Our company specializes in producing a range of excavator hydraulic cylinders, including excavator arm cylinders, boom cylinders, bucket cylinders, cylinder tubes, and cylinder rods. With 10+ years expertise, we've established a complete production line from R&D to manufacturing, offering OEM customization and precise part number systems with technical specifications/photos/pricing. We pride ourselves on using premium materials such as high-strength steel and advanced processing technologies to ensure durability and performance.

In addition to hydraulic cylinders, we also provide a comprehensive range of other hydraulic components. This includes hydraulic pumps, swing motor, control valve,travel motors,engine parts,and undercarriage components, all designed for use in various excavator models. Our extensive product portfolio reflects our commitment to delivering complete solutions for construction machinery, ensuring that all critical components are available to meet the needs of our customers.

We serve a global customer base, including clients from Thailand, the Philippines, Indonesia, Malaysia, the United States, Turkey, Russia, Mexico, and many other countries. Our products have been recognized and recommended by local dealers and are highly regarded for their quality and reliability. With our competitive prices, timely delivery, and outstanding customer service, we are committed to providing the best solutions for each client. We warmly welcome inquiries from businesses worldwide and look forward to establishing long-lasting partnerships.