Need to order the following parts: One main hydraulic pump 6 Hydraulic filter elements One pressure regulating valve One (1) auxiliary hydraulic pump One (1) Steering valve -Orbitrol One (1)air dryer/filter for the compressed air system One (1) service kit of steering bushings for FD420Z5 -nr 53900131 with ISUZU motor model 6RB1T . serial nr 512823