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Introduce Hydraulic Bucket Cylinder Seal Kit 4649053 For ZAX330-3 EX300-5 For You

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December 08, 2025
Category Connection: Excavator Cylinder Seal Kits
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Tags:
#PC200-5 Excavator Cylinder Bucket Seal Kit #SKF Cylinder Bucket Seal Kit #SKF Seal Kit
Brief: In this video, we take a focused look at the specifications and what they mean in practice for the SKF 4649053 hydraulic bucket cylinder seal kit. You'll see a detailed explanation of each component, from the dustproof seal to the piston seal, and learn how they work together to ensure reliable performance for ZAX330-3 and EX300-5 excavators under high-pressure conditions.
Related Product Features:
  • The dustproof seal acts as the first line of defense by scraping dirt and impurities from the piston rod surface.
  • The main piston rod seal provides dynamic sealing under high pressure to prevent hydraulic oil leakage.
  • A buffer seal protects the main seal from high-pressure impact and prevents extrusion during pressure peaks.
  • The piston seal isolates the two chambers of the hydraulic cylinder and bears the main working pressure for reciprocating drive.
  • Guide rings and support rings bear lateral forces to prevent metal contact and ensure smooth, aligned movement.
  • O-rings and washers serve as static auxiliary seals that support the main sealing lip for immediate response.
  • Designed specifically for compatibility with Hitachi ZAX330-3 and Hitachi EX300-5 excavator models.
  • Constructed with durable materials to withstand the demanding conditions of hydraulic cylinder operation.
FAQs:
  • Which excavator models is the SKF 4649053 seal kit compatible with?
    This seal kit is specifically designed for the Hitachi ZAX330-3 and Hitachi EX300-5 excavator models, ensuring a perfect fit and optimal performance for the bucket cylinder.
  • What is the function of the main piston rod seal in this kit?
    The main piston rod seal is the key sealing component that achieves dynamic sealing of the piston rod under high pressure, effectively preventing hydraulic oil leakage during operation.
  • How does the buffer seal protect the hydraulic cylinder?
    The buffer seal is resistant to high-pressure impact and acts as a backup, protecting the main seal from being squeezed out or damaged during pressure peaks, thereby extending the seal life.
  • What role do the guide rings play in this seal kit?
    The guide rings, or support rings, bear lateral forces to prevent the piston from making metal-to-metal contact with the cylinder barrel, ensuring proper alignment and smooth, friction-free movement.
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