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Electric Rope Shovel Undecking


Joy Global


Gold Mine, U.S.A.


Routine maintenance is required on a P&H 4100XPC Electric Rope Shovel after every 30,000 hours of operation. The maintenance activities require the upper section to be lifted off the car body to machine bearing surfaces and inspect and repair structural components. Weighing approximately 1,000 tons, lifting the upper car body requires a significant amount of force and control. The maintenance team at Joy Global reached out to Enerpac to deliver a shovel lift system to undeck a shovel in approximately one hour and be transported on the highway without oversized load permits. The speed and safety of the lift were critical components to reducing labor and equipment downtime.


We had previously built a similar shovel lift system for Joy Global’s maintenance team in Chile. The second generation system built for Joy Global’s service team in Gillette provided significantly more speed. The system included four 500 ton cylinders with 72 inches of stroke, an EVO synchronous control unit and four custom 8000 series hydraulic pumps. Each pump was built to operate in extremely cold or hot environments. The EVO synchronous control unit enabled a single operator to control the entire lift and ensure each lifting point remained within 3/8 of an inch. The shovel was successfully undecked in approximately one hour and the entire system was transported on the highway without oversized load permits.


Custom 500 ton Cylinders, Custom 8000 series Hydraulic Pumps, EVO Synchronous Lifting System