Hydraulic cylinders, bearings and gears are most critical component for a construction machinery, the property would affect the function and reliability.

After long time service under severe environment and working condition, the construction machinery components would be damaged at different degree. In some circumstance, the damage may be repaired, by machining, adding parts, changing part, or welding, or electro plating. But if the damage is very seriously, or damage at very sensitive position, then it's not possible to be repaired by conventional methods.

Recently, as the progress of powerful laser process, the remanufacturing of high end equipment by laser is widely promoted. Laser cladding is novel, continously surface treatment technology, could enhance the surface of hydraulic cylinders, bearings and gears, further more, could remanufacture from abunded components, the refurbished part could match the properties of new parts, which prolong the servive life time of construction machinery, effectively reduce energy and resource consumptions, contribute to continuously development.