I. Product Positioning
• Core Function:TheLift Cylinderis a key hydraulic actuator for theboom (arm) lifting mechanismof Komatsu’s27/28/30/40MR-2 series compact excavators. It converts hydraulic energy into mechanical force to drive the boom’s upward/downward movement, enabling digging, loading, and other operations.
• Compatible Models:Designed exclusively forKomatsu 27/28/30/40MR-2 compact excavators. Strict adherence to original specifications is required to ensure compatibility and performance.
------
II. Technical Specifications
1. Structure & Materials
• Cylinder Body & Piston Rod: High-strength alloy steel for pressure resistance, impact durability, and corrosion protection.
• Sealing System: Wear-resistant, high-temperature seals to minimize hydraulic fluid leakage and extend service life.
2. Hydraulic Parameters
• Operating Pressure: Matches the excavator’s main system pressure (typically21–35 MPa; refer to model-specific manuals).
• Stroke Length: Customized to the boom’s design for optimal lifting height and operational range.
• Mounting Dimensions: Precision-engineered to align with the excavator’s boom connection points and ball joint specifications, avoiding installation interference.
3. Performance Optimization
• Fast Dynamic Response: Smooth lifting motion with reduced shock and vibration.
• Low Friction Design: Enhances energy efficiency and operational productivity.
------
III. Application Scenarios
• Typical Operations:
• Earthmoving, material loading, site grading, and other tasks, particularly in confined spaces or light-duty applications.
• Environmental Adaptability:
• Suitable for general construction conditions (temperature ranges, dust, humidity).
• Avoid extreme environments: Prolonged submersion, high-temperature radiation, or corrosive substances.
------
IV. Selection & Replacement Guidelines
1. Original Equipment Verification
• Confirm the part number (e.g.,708-3S-03572or equivalent) matches the original excavator to prevent mismatches or performance issues.
• Prioritize purchasing fromKomatsu-authorized channelsor certified suppliers to ensure authenticity.
2. Compatibility Checks for Aftermarket Parts
• If using non-original components, validate:
• Hydraulic port dimensions and thread specifications.
• Mounting hole spacing and ball joint diameter.
• Stroke length and load capacity alignment.
3. Maintenance Recommendations
• Regularly inspect seals for wear and replace aging components promptly.
• Protect the cylinder body from external impacts to prevent deformation or scratches.
• Usemanufacturer-recommended hydraulic fluidand adhere to replacement/filtration intervals.
------
V. Market Reference
• Price Range:
• Original Komatsu lift cylinders typically costseveral thousand to over ten thousand RMB, varying by model and region (consult suppliers for exact quotes).
• Alternative Solutions:
• Some certified third-party manufacturers offer compatible parts, but rigorous quality verification is essential.
