TM10-3930-660-34 While holding button down on top of the electric joystick and moving the joystick diagonally from center will energize two solenoids  at  the  same  time.  These  four  diagonal  positions  can  move  the  forks  apart,  together,  both  right,  or  both  left depending on which combination of solenoids is used. Section II.  HYDRAULIC SYSTEM MAINTENANCE PROCEDURES HYDRAULIC SYSTEM MAINTENANCE TASK SUMMARY TASK PAGE PARA. PROCEDURES NO. 16-3 Tandem Gear Pump - Repair 16-10 16-4 Main Control Valve Assembly - Repair 16-19 16-5 MLRS Attachment Control Valve - Repair 16-24 16-6 Priority Valve - Repair 16-30 16-7 Frame Tilt/Brakes Relief Valve - Repair 16-31 16-8 Frame Tilt Valve - Repair 16-34 16-9 Frame Tilt Cylinder - Repair 16-37 16-10 Carriage Tilt Cylinder - Repair 16-41 16-11 Carriage Assembly - Replace 16-45 16-12 Boom Assembly - Replace 16-48 16-12.1 Inner Boom - Replace/Repair 16-57 16-12.2 Intermediate Boom - Replace/Repair 16-73 16-12.3 Outer Boom - Replace/Repair 16-80 16-13 Boom Pivot Pin - Replace 16-89 16-14 Wear Pads - Replace 16-91 16-15 Extend and Retract Chains - Replace 16-94 16-16 Boom Extend Cylinder - Replace/Repair 16-98 16-17 Fork Sideshift Cylinders - Repair 16-107 16-18 Boom Hoist Cylinders - Repair 16-112 16-18.1 Hydraulic Joystick - Repair 16-117 16-19 MLRS Attachment Cylinder - Repair 16-121 16-20 Hydraulic Hoses - Repair 16-127 16-21 Piston Pump - Repair 16-128 16-9