TM 9-2320-209-20-3-4 19-22. FLEXIBLE HYDRAULIC LINES REMOVAL AND REPLACEMENT (TRUCK M342A2). TOOLS: 1 1/4-inch open end wrench 1 3/8-inch open end wrench (2) One-gallon container SUPPLIES: Tags PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine WARNING off, handbrake set. Never work under dump body unless safety braces are in place. Dump body could drop and personnel could be seriously injured. a. Preliminary Procedure. Raise dump body and set safety braces. Refer to para 19-24. 19-113