4450651 4438245 Bucket Hydraulic Cylinder For Hiatchi Excavator EX1200-5 EX1200-6 Excavator Parts

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%.

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Company Information

GuangZhou GuoLi Engineering Machinery Co., Ltd. has over 16 years of expertise in excavator hydraulic cylinders, serving as a trusted global supplier and manufacturer. We provide a wide range of products, including arm cylinders, boom cylinders, bucket cylinders, cylinder tubes, piston rods, custom hydraulic cylinders, seal kits, hydraulic pumps, and electrical parts—compatible with various excavator models. Exporting to over 100 countries, we are committed to delivering high-quality, durable solutions to meet the needs of our customers worldwide.

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Excavator Hydraulic Cylinder Maintenance Tips

1. Check for Leaks– Regularly inspect hydraulic cylinders for oil leaks around seals and connections to prevent performance issues.  

2. Inspect Seals and Rods– Examine seals for wear or damage and keep the piston rods clean to prevent contamination and premature wear.  

3. Use High-Quality Hydraulic Oil– Ensure the use of clean, high-grade hydraulic oil and replace filters regularly to maintain smooth operation.  

4. Avoid Overloading – Do not exceed the excavator’s rated load capacity to reduce excessive stress on hydraulic cylinders.  

5. Monitor Performance– Pay attention to any unusual noises, jerky movements, or slow operation, as these may indicate internal damage or wear.  

6. Lubrication and Corrosion Prevention – Apply proper lubrication to moving parts and protect exposed surfaces from rust and corrosion.  

7. Schedule Regular Maintenance – Perform routine inspections and servicing to extend the lifespan of hydraulic cylinders and prevent costly repairs.