The JLG Steering Control Hydraulic Orbital is used on various JLG and Gradall telehandlers. The orbital controls the hydraulic output of steering functions on telehandler machines.For use on Gradall models : 522, 522D, 522D Lo-Pro, 524, 524D, 524D Lo-Pro, 532C-6, 532C-10, 534C-6, 534C-9, 534D-6, 534D-6T, G6-42P, and on JLG models: TF6-42, G6-42A, G6-42P, G9-43A, G10-43A, G10-55A, G12-55A, G15-44A. Please confirm the proper serial number rangefor your machine.