TM 9-2320-209-20-3-4 19-15. CARRIAGE CROSS CHAIN REMOVAL AND REPLACEMENT (TRUCK M764). TOOLS: 1/2-inch wrench Breaker bar 3/4-inch socket Socket extension 3/4-inch wrench 15/16-inch wrench (2) Hammer Flat-tip screwdriver SUPPLIES: None PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Preliminary Procedure. Remove secondary reduction drive chain. Refer to para 19-17. b. Removal. FRAME 1 1. 2. 3. GO Using 1/2-inch wrench, unscrew and take out four screws, washers, and lock- washers (1) from cross chain cover (2). Take off cross chain cover (2). Turn sprocket (3) until you find connecting link (4) in cross chain (5). TO FRAME 2 19-76