4698978 4698977 Durable Boom Hydraulic Cylinder Assy for ZX870-5G ZX870LC-5G Excavator

Prouduct Description

For the tube:

1.we use 25Mn steel, which is the same as original manufacturer of hydraulic cylinders.
2.The surface is sandblasted ,first, using the paint baking process, spraying primer and drying, and then spraying top paint, 2 layers of paint

For the rod:

1.Piston rod overall conditioning
2.High frequency surface hardening , hardness up to 55.
3.The surface is treated with hard chromium plating.

For the seal:

We use Japan NOK and US SKF imported seals, and the oil leakage rate of the cylinder is controlled below 1%.

Company Information

With over 16 years of specialized expertise, GuangZhou GuoLi Engineering Machinery Co., Ltd. has emerged as a manufacturer and solution provider in the excavator hydraulic systems sector. Our company delivers comprehensive, precision-engineered components—including arm, boom, and bucket cylinders, high-strength cylinder barrels, induction-hardened piston rods, fully customizable hydraulic cylinders, advanced sealing kits, hydraulic pumps, and critical electrical components. Each product is meticulously developed to ensure seamless compatibility with a broad spectrum of excavator brands and models.

Serving customers in more than 100 countries across six continents, we are committed to delivering performance-driven, durable, and cost-effective hydraulic solutions that meet the evolving demands of heavy equipment professionals worldwide. Our vertically integrated production capabilities, strict adherence to international quality standards, and dedication to responsive service distinguish us as a trusted long-term partner in the global construction machinery supply chain.

Customer Evaluation

More Cylinder We Can Provide(not more than that)

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.