Product superiority
1. High Reliability Materials and Processes
Special Alloy Steel: Utilizing Komatsu's custom-designed 35CrMo low-alloy high-strength steel, with a tensile strength ≥1300MPa and fatigue resistance 50% higher than ordinary steel.
Precision Machining: The cylinder barrel undergoes cold drawing and precision honing, achieving an inner wall roughness ≤Ra0.15μm and roundness error <0.008mm, ensuring smooth piston operation.
Enhanced Corrosion Protection: Hard chrome plating (0.06mm thickness) on both inner and outer surfaces, plus passivation treatment, achieving a salt spray test tolerance time ≥1000 hours, suitable for high humidity/salt-alkali conditions.
Full Inspection Process: 100% of cylinders undergo high-pressure withstand testing (40MPa pressure holding for 5 minutes) before leaving the factory, eliminating the risk of leakage.
2. High Efficiency Sealing and Compatibility
Quadruple Sealing System: Utilizes a combination of dust seal + Step seal + Glyd ring + support ring, achieving a leakage rate of < 0.005ml/h and extending seal life to 8000 working hours.
Imported Sealing Components: The main seal is made of Parker polyurethane material, with a temperature range of -45℃ to +125℃ and a high pressure resistance of up to 38MPa.
Original Factory Precise Compatibility: 100% compatible with the hydraulic system of Komatsu GD series graders, allowing for direct replacement without adjustment, ensuring overall hydraulic efficiency.
All-Condition Endurance: Adaptable to extreme environments such as desert high temperatures, extreme northern cold, and coastal high humidity, reducing operational failure rate by 70%.
3. High Efficiency Sealing and Compatibility
Modular design: Cylinders, end caps, and other components can be repaired and replaced individually, reducing maintenance costs by 40%.
Long lifespan: Under normal maintenance, the service life can reach 15,000 working hours, which is 2-3 times that of ordinary aftermarket parts.
Lightweight structure: 12% lighter than traditional hydraulic cylinders (approximately 3kg), indirectly reducing overall fuel consumption.
Installation and Maintenance Recommendations
1.Installation Points
Before installation, clean the cylinder inner wall and oil ports to prevent impurities from entering the hydraulic system;
Use special tools when installing the seals; do not directly strike the seals to prevent damage to the lip;
Ensure the cylinder axis is aligned with the load direction to avoid abnormal wear caused by uneven loading;
Apply a small amount of hydraulic oil when connecting the oil ports and tighten the joints to a torque of 28-32 N·m to prevent leakage.
2.Maintenance suggestion
Routine Inspection: Before each operation, check the piston rod surface for scratches and for oil leaks at the seals;
Regular Maintenance: Replace the hydraulic oil filter every 300 working hours and check the oil cleanliness (NAS grade ≤ 8);
Quarterly Inspection: Measure the wear on the cylinder inner wall; if it exceeds 0.05mm, repair it promptly;
Long-Term Storage: The piston rod should be retracted to 1/2 of its stroke, the inner cavity filled with rust-preventive hydraulic oil, and the piston rod wrapped with a dust cover.
