TM 9-2320-209-20-3-4 19-14. REAR WINCH DRIVE CHAIN ADJUSTMENT (TRUCK M756A2). TOOLS: 1/2-inch wrench (2) 15/16-inch wrench 15/16-inch socket Breaker bar 6-inch ruler Prybar Drill 6-inch extension SUPPLIES: None PERSONNEL: One EQUIPMENT Condition: Truck parked, engine off, handbrake set. a. Preliminary Procedure. Pull both gin poles away from truck. Refer to TM 9-230-209-10. b. Adjustment. FRAME 1 1. Using 1/2-inch wrenches, unscrew and take out four screws (1) and nuts (2). 2. Take off floor plate (3). 3. Using 15/16-inch wrench, breaker bar, and 15/16-inch socket, loosen six screws (4) and nuts (5). GO TO FRAME 2 19-70