Introduction: "To do a good job, one must first sharpen his tools." The performance and lifespan of an expensive hydraulic shear largely depend on daily operation and maintenance. Misoperation may cause the blade to break and the arm to crack, while neglecting maintenance can lead to premature aging. This article systematically outlines the correct operating specifications, core maintenance points, and efficiency improvement techniques for hydraulic shears.

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1. Safe operation norms and efficient techniques

Pre-assignment check:

Peripheral inspection: Check all fastening bolts (especially the knife shaft pin and main pin) for firmness, and inspect the hydraulic pipeline for wear and oil leakage.

Key points: Inspect the wear condition of the blade, checking for chipping and cracks. Check the lubrication condition of the rotary joint (if equipped).

Correct cutting posture:

Align the position: Try to place the material to be cut at the center of the cutting edge to avoid eccentric shearing, which can greatly increase the load on the hydraulic cylinder and structural stress.

Vertical shear: Ensure the excavator's posture is adjusted so that the shear force is perpendicular to the main stress direction of the material, in order to achieve the best shear effect.

Avoid brute force: When encountering thick and hard materials that are difficult to cut, do not "hold pressure" for a long time. Try adjusting the cutting point, or use a "pecking" method to cut in stages.

Efficient work skills:

Pre-compression and obstacle removal: Before shearing, use a blade to compact or remove the concrete and debris on the surface of the material to ensure that the blade directly contacts the metal.

Utilizing gravity: For long materials, one can first use a hydraulic shear to grab and lift one end, and utilize the material's own weight to assist in bending. Then, perform the cutting, achieving twice the result with half the effort.

Classification task: Sort and stack materials of different thicknesses and materials for centralized processing, reducing the frequent switching and wear of blades between materials of different hardnesses.

II. Tiered maintenance plan: ensuring investment value exceeds cost

Daily maintenance (per shift/per day):

After the work is done, clean the entire hydraulic shear, especially removing the accumulated material and dirt from the cutting edge and rotating parts.

Apply butter (lithium-based grease) to all pin shafts and rotating parts until the old grease is completely squeezed out.

Conduct a visual inspection for any signs of oil leakage, abnormal wear, or cracks.

Regular maintenance (every 250-500 working hours):

Comprehensive tightening: Use a torque wrench to retighten all critical bolts according to the torque specified by the manufacturer.

Inspect the blade: Measure the wear of the blade in detail. When the edge wear reaches the specified limit (usually 10-15 millimeters), it must be re-edged or replaced, otherwise the shearing force will decrease sharply and damage the blade seat.

Replace the filter element: If the hydraulic shear has an independent circulation system or return oil filter, replace the hydraulic oil filter element as required.

Long-term storage: After thorough cleaning, apply anti-rust oil to all exposed metal parts (especially the blade and piston rod), retract the cylinder piston rod, and store it in a dry room.

Conclusion: Integrating professional operating habits and systematic maintenance plans into your daily work will transform your hydraulic shear from a "cost center" into a "profit center" that continuously generates value for you. Every correct lubrication and timely inspection safeguards its long-term service and your return on investment.