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Kobelco SK120 Pilot Pump Upgrade

Pilot Pump
January 20, 2026
Category Connection: Pilot Pump
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Tags:
#external gear pump #excavator pilot pump #hydraulic pilot pump
Brief: Follow along for a hands-on demonstration that highlights performance points. This video provides a detailed walkthrough of the K3V63 External Gear Pilot Pump upgrade for Kobelco SK120 excavators. You'll see the pump's key installation features, learn about its direct compatibility with K3V63 systems, and observe how its 13-tooth gear design ensures reliable hydraulic performance in demanding industrial applications.
Related Product Features:
  • Designed as a direct replacement pilot pump for Kobelco SK120 excavators with full K3V63 compatibility.
  • Features a 13-tooth involute spline gear with 1 module and 20° pressure angle for precise engagement.
  • Delivers nominal displacement options of 10mL/r or 15mL/r to match specific hydraulic system requirements.
  • Operates at optimum speeds between 1500-2500 rpm with a broader working range of 800-2800 rpm.
  • Maintains high volumetric efficiency of ≥92% for consistent hydraulic pressure up to 5 MPa.
  • Includes two oil hole configuration for proper hydraulic fluid flow and system integration.
  • Built to OEM-grade specifications with precise machining and strict quality control standards.
  • Compact design with specific dimensional parameters (L: 89-95mm, L1: 61-59mm, L2: 65-71.5mm) for easy installation.
FAQs:
  • Is this pilot pump compatible with my Kobelco SK120 excavator?
    Yes, this K3V63 external gear pump is specifically designed as a direct replacement for Kobelco SK120 excavators. It features identical installation dimensions and performance characteristics as the original K3V63 pump, ensuring perfect compatibility without modifications.
  • What are the key technical specifications of this pilot pump?
    The pump features a 13-tooth involute spline gear with 1 module and 20° pressure angle. It comes in two models: K3V63-10L with 10mL/r displacement and K3V63-15L with 15mL/r displacement. Both operate at 3.5-5 MPa pressure with optimum speeds of 1500-2500 rpm and maintain volumetric efficiency above 92%.
  • How does this aftermarket pump compare to OEM parts?
    This pilot pump is manufactured to OEM-grade standards with precise machining and strict quality control. It offers identical performance, dimensions, and compatibility as original K3V63 pumps, making it suitable for repair, maintenance, refurbishment, and replacement applications with reliable operation.
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