TM 9-2320-209-20-3-3 18-50. HOSE COUPLING GASKET REMOVAL AND REPLACEMENT (TRUCK M49A2C). WARNING Smoking, sparks or open flame are not allowed within 50 feet of work area during this task. Fuel may burn and cause an explosion, resulting in injury to personnel and damage to equipment. TOOLS: Adjustable wrench Spanner wrench SUPPLIES: Gasket PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Removal. FRAME 1 NOTE Some hoses may have spring (1) on the end. The procedure is the same for both hoses. 1. Using spanner wrench, hold fitting (2). Using adjustable wrench, unscrew coupling nut (3). 2. Take out hose (4) from fitting (2). GO TO FRAME 2 18-255