Guangzhou Yangkai Machinery Parts Co., Ltd.
| For | Hitachi hydraulic system |
| Available | in stock |
| Pressure | 40 MPa |
| AppliCion | Excavator hydraulic bucket cylinders used in construction and earthmoving equipment |
| Parts No | 4649053 |
| Sealtype | Rod seal, piston seal, guide ring |
| Installation | Easy to Install with Standard Tools |
| Certifiion | ISO 9001、ISO 14001 |
| Temperature | -40°C to +100°C |
| Function | Prevents Hydraulic Fluid Leakage |
| Transport Package | Carton Packing |
| Material | PTFE、NBR、AU |
| Color | Black, white, green, purple |
| CertifiCion | ISO 9001、ISO 14001 |
| Payment Terms | L/C, T/T, D/P, D/A,Alipay, PayPal |
| Supply Ability | 500 sets |
| Delivery Time | 7~10 Work days |
| Packaging Details | Plastic/cardboard box/ custom-made |
| Brand Name | SKF |
| Model Number | ZAX330-3 EX300-5 |
| Place of Origin | Korea |
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Product Specification
| For | Hitachi hydraulic system | Available | in stock |
| Pressure | 40 MPa | AppliCion | Excavator hydraulic bucket cylinders used in construction and earthmoving equipment |
| Parts No | 4649053 | Sealtype | Rod seal, piston seal, guide ring |
| Installation | Easy to Install with Standard Tools | Certifiion | ISO 9001、ISO 14001 |
| Temperature | -40°C to +100°C | Function | Prevents Hydraulic Fluid Leakage |
| Transport Package | Carton Packing | Material | PTFE、NBR、AU |
| Color | Black, white, green, purple | CertifiCion | ISO 9001、ISO 14001 |
| Payment Terms | L/C, T/T, D/P, D/A,Alipay, PayPal | Supply Ability | 500 sets |
| Delivery Time | 7~10 Work days | Packaging Details | Plastic/cardboard box/ custom-made |
| Brand Name | SKF | Model Number | ZAX330-3 EX300-5 |
| Place of Origin | Korea | ||
| High Light | Bucket Cylinder Seal Kit 4649053 ，Bucket Cylinder Seal Kit EX300-5 ，seal kit bucket EX300-5 | ||
Durable hydraulic cylinder excavator bucket seal kit SKF 4649053 for ZAX330-3 EX300-5
| Typical components | Core Functions |
| Dustproof seal (dust ring) | The first line of defense involves forcefully scraping away the dirt and impurities adhering to the piston rod surface. |
| Main piston rod seal | The key sealing component achieves dynamic sealing of the piston rod under high pressure, preventing oil leakage. |
| Buffer seal (backup seal) | It is resistant to high-pressure impact and protects the main seal from being squeezed out at pressure peaks. |
| Piston seal (main pressure seal) | The two chambers of the hydraulic cylinder are isolated to bear the main working pressure and realize the reciproCing drive of the hydraulic cylinder. |
| Guide ring/support ring | It bears lateral forces, prevents the piston from coming into metal contact with the cylinder, and ensures alignment and smooth movement. |
| O-rings/washers | The static auxiliary seal supports the main sealing lip, ensuring its immediate sealing response. |
Core Principles and Functions
►Hydraulic bucket cylinders operate in extremely harsh environments: high pressure, high-frequency impact, large lateral forces, and high dust levels.
►A single seal is insufficient to handle these conditions; therefore, SKF employs a "system solution," utilizing a carefully matched set of sealing components working in tandem.
♦ Key Advantages and Value of SKF Genuine Parts ♦
Compared to ordinary seals or generic kits, they offer significant advantages
►Extremely High Reliability: Specifically designed and tested for extreme conditions, with precise material matching, they can withstand high pressure and temperature variations, significantly reducing failures.
►Significantly Extended Lifespan: Low-friction, high-wear-resistant materials (Turcon) reduce seal wear, extending service life.
►Superior Sealing Performance: Maintains a stable seal even under pressure and temperature fluctuations, reducing hydraulic oil leakage, keeping equipment clean, and saving expensive hydraulic oil.
►Optimized Equipment Performance: Precise guidance and low-friction design result in smoother cylinder operation and faster response, contributing to improved overall machine efficiency and smoothness.
►High Maintenance Cost-Effectiveness: While the initial purchase cost may be higher, the longer service life, less downtime, and avoidance of damage to other expensive components result in a lower Total Cost of Maintenance (TCO).
Connecting global vision, building an excellent future. We remain active at the forefront of industries both domestically and internationally.
From 2023 to 2025, we have participated in the Russian CTT International Construction Machinery Technology Exhibition,
the Shanghai bauma Construction Machinery Exhibition, and are about to appear at the Indonesia Energy and Engineering Series Exhibitions.
Every appearance is a firm commitment to technological innovation and industry development.
We look forward to meeting you and jointly creating a new chapter of cooperation, building a solid future together.
►HOT PRODUCTS
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Company Details
Business Type:
Manufacturer,Distributor/Wholesaler
Year Established:
2008
Total Annual:
5000000-8000000
Employee Number:
50~60
Ecer Certification：
Verified Supplier
Guangzhou Yangkai Machinery Parts Co., Ltd. was founded in 2008, our company has 18 years experience which is a professional, diversified construction machinery parts supply enterprises, Our products suitable for: komatsu, C, Hitachi, sumitomo, kato, daewoo, hyundai,kobelco,,Sany and other brands of... Guangzhou Yangkai Machinery Parts Co., Ltd. was founded in 2008, our company has 18 years experience which is a professional, diversified construction machinery parts supply enterprises, Our products suitable for: komatsu, C, Hitachi, sumitomo, kato, daewoo, hyundai,kobelco,,Sany and other brands of...
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