TM 9-2320-209-20-3-2 13-12. HYDRAULIC MASTER CYLINDER ASSEMBLY REMOVAL AND REPLACEMENT. TOOLS: 3/8-inch wrench 3/4-inch wrench 1/2-inch wrench Cross-tip screwdriver (Phillips type) 8-inch slip joint pliers 1/2-gallon container 9/16-inch socket Pliers 3/8-inch drive socket wrench set SUPPLIES: Cotter pin PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Removal. FRAME 1 1. Using screwdriver, unscrew and take out screw (1). Open master cylinder access door (2). GO TO FRAME 2 13-78