2438U1137F1 for Kobelco Excavator SK250-8 SK250 Hydraulic Arm Cylinder Assy

SK250 Boom Cylinder: 2438U1135F1 2438U1136F1 2438U999S1
SK250 Arm Cylinder: 2438U1137F1
SK250 Bucket Cylinder: 2438U1138F1 2438U1097F2

Excavator hydraulic cylinders are exposed to a wide range of working environments, from dusty construction sites and high-temperature mining zones to freezing winters in mountainous regions. At GLPARTS, our cylinders are engineered to deliver stable performance, extended service life, and reduced maintenance needs — even under the most demanding conditions.

How to deal with high temperature

GLPARTS uses heat-resistant sealing systems (including Japan NOK and US SKF materials), high-frequency surface-hardened piston rods, and enhanced chrome plating to prevent wear, oxidation, and seal deformation. This ensures smooth operation and leak-free performance, even when exposed to continuous high-pressure cycles and ambient temperatures exceeding 50°C.

How to deal with low temperature environment

To address this, GLPARTS cylinders can be equipped with cold-weather adaptive seals, precision-machined internal clearances, and low-temperature hydraulic oil compatibility. These features help maintain consistent piston movement and quick pressure response, reducing downtime during winter operations.

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.