4659271 4673501 4328130 Boom Bucket Arm Oil Cylinder for ZX850-3 ZX870-5G Hydraulic Excavator

Prouduct Description

Why Choose Us?

Direct from Factory – No middlemen, better prices.

Own Manufacturing – Full control over quality and delivery.

Expert Support – 24/7 professional assistance for all technical questions.

Top-notch Service – Fast response, smooth communication, worry-free after-sales.

Premium Products – Durable, high-performance parts trusted worldwide.

Cylinder dimension confirmation

Before order confirmation, we will verify cylinder size and mounting details with you.

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.

Hydraulic Cylinder Tools We Can Provide

1. Cylinder Disassembly Bench
Always secure the cylinder tightly before starting disassembly. Apply steady pressure to avoid damaging the thread or surface.

2. Oil Seal Tightener
Use a small amount of hydraulic oil to lubricate the seal before installation. This reduces friction and prevents seal distortion.

3. 3-Jaw / 4-Jaw Wrench
Choose the correct jaw size for your cylinder nut. Apply even force—never hammer or twist aggressively, as this can damage threads.

4. Dust Seal Installing Tool
Align the seal properly before pressing. Using the wrong angle can cause the seal to fold or tear.

5. Oil Seal Hook / Removal Tool
Insert the hook gently under the old seal. Pry evenly from multiple points to avoid scratching the seal groove.

More Cylinders 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.