Core Features
Power Execution: Receives high-pressure oil from the hydraulic pump (rated pressure 25MPa), outputting a stable thrust (≥120kN) to drive the scraper to complete lifting and tilting movements, suitable for heavy-duty leveling operations.
Precise Positioning: Through hydraulic valve control and cylinder stroke control, the scraper position can be finely adjusted (accuracy ±5mm), ensuring road surface smoothness error ≤3mm/m.
Impact Resistance and Cushioning: Built-in cushioning structure absorbs ground impact during scraper operation, preventing piston rod/cylinder deformation or leakage due to instantaneous load.
Sealing and Pressure Holding: Two-way sealing design prevents internal/external hydraulic oil leakage, ensuring stable system pressure and reducing energy consumption and oil loss.
Product superiority
Original Factory Precise Fit: Cylinder/piston rod dimensions are 100% compatible with GD series mounting positions. Seals are compatible with hydraulic oil, ensuring no leakage or abnormal noise after installation and guaranteeing smooth operation.
High Pressure Leak-Resistant and Durable:Cylinder inner wall is rolled/honed (Ra≤0.2μm), piston rod chrome-plated for wear and corrosion resistance, and seals made of polyurethane/nitrile rubber. Leakage under high pressure is ≤0.1mL/min.
High Rigidity and Deformation Resistance: Cylinder wall thickness ≥12mm, piston rod chrome-plated + hardened. Bending deformation under heavy load is ≤0.03mm, suitable for continuous operation and impact.
Buffering and Noise Reduction: Built-in one-way throttling buffer valve reduces peak impact by 40%, operating noise ≤85dB, improving operator comfort.
Easy Maintenance: Standard interfaces and quick-change seals shorten replacement cycles by 50%, reducing downtime maintenance costs.
Application scenarios and installation tips
Applicable Working Conditions: GD series graders are suitable for routine and heavy-duty operations such as highway subgrade leveling, municipal road maintenance, and mine site grading, especially for continuous operation scenarios involving high-frequency lifting/tilting.
Installation Instructions: Before installation, clean the hinge points and sealing surfaces, and apply grease; check that the chrome plating of the piston rod is free of scratches and that the seals are undamaged; after installation, vent air, test the smoothness of operation and sealing performance, and put the machine into use only after confirming there are no leaks.
Selection and Replacement Recommendations
Prioritize original equipment manufacturer (OEM) parts or parts that meet Komatsu hydraulic standards to avoid damage to core components such as hydraulic pumps and valves due to material or seal failure caused by inferior parts.
If the chrome plating on the piston rod peels off, the cylinder wall is scratched, or there is external leakage (daily leakage > 5mL) or slow operation, it is recommended to replace the cylinder and seals immediately.
