320C and 322C Excavators Attachment Hydraulic System – Shuttle Valve (Pilot Lines) Illustration 1 g02575516 Table 1 Specification for 164-6979 Shuttle Valve Gp Item Qty Part Specification Description 1 2 175-4430 Connector As Torque to 35 ± 3 N·m (26 ± 2 lb ft).