The parts needed vary if the machine is already equipped with third valve ready mounting hardware, or is a high lift machine. If a machine is not equipped with a third valve ready attachment, 608-9882 Third Function Hydraulic Kit (hardware) is also required. High lift machines need additional components see parts list for more details. Operator third valve implement controls (single axis lever, or joystick) are needed to enable this functionality. See MWL Kits Visual Reference Guide for details. For further details, reference media available at catpublications.com and SIS2.cat.com (M0136401) or contact your local Cat® Dealer.