In modern open-pit mining operations, stacker reclaimers play a vital role in material handling. These massive machines are responsible for stacking and reclaiming bulk materials such as coal, iron ore, and bauxite. A typical stacker reclaimer can weigh several hundred tons and move thousands of tons of aggregate per hour—making its operational reliability critical to production continuity. One of Yongjian’s mining clients encountered a serious issue: a major bearing in a 470-ton stacker reclaimer required replacement due to fatigue failure. The bearing supported a critical slewing motion component. Any downtime would directly impact the material loading process and overall productivity. A high-capacity hydraulic control solution enabling precise, synchronized movement of multiple cylinders. This system ensured real-time feedback and correction across each lifting point, maintaining perfect parallelism during the lift. Four ultra-high-pressure lifting cylinders (700 bar rated) were dep