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)