TM 9-2320-209-20-3-3 18-95. SNATCH SHEAVE REMOVAL AND REPLACEMENT (TRUCK M764) TOOLS : Adjustable wrench SUPPLIES : None PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Removal. 1. Hold sheave housing (1) and using adjustable wrench, unscrew and take out eyebolt (2). 2. Take ring (3) off sheave housing (1) . END OF TASK 18-521