Set up hydraulic jacks used to raise precast concrete floors.
What does a Hydraulic-Jack Adjuster do?
Sets up hydraulic jacks used to raise precast concrete floors and roof slabs: Guides threaded lift rods, raised by STRUCTURAL-STEEL WORKERS, through holes in jack frames. Slips lift nut over end of rod and inserts hinged nut to fasten lift rod onto jack. Mounts hydraulic motor to jack, using handtools. Fits drive chain around gears on motor and lift nuts. Pulls idler gear arm to adjust tension of drive chain and bolts it in position. Snaps hose fittings and electric wiring in place to connect jacks to control panel and pump. Observes performance of jacks during lifting operations and signals LIFT-SLAB OPERATOR when malfunction occurs.