TM 9-2320-209-20-3-3 c. Replacement. FRAME 1 1. 2. 3. 4. 5. CAUTION Do not overtighten hose fittings when joining hoses. Finger tighten hose adapters. Using wrench, tighten 1/8 turn more. NOTE Take caps off hoses and fittings before putting on hose fittings. Working under truck using 7/8-inch wrench, screw on and tighten four elbows (1) into control valve (2) . Using 1 1/16-inch wrench, screw on and tighten two elbows (3) into control valve (2) . Aline holes in control valve (2) with holes in truck body. Using 9/16-inch wrench, screw in and tighten three lockwashers and capscrews (4) . Using 1-inch wrench, screw on and tighten control valve supply hose (5) and control valve-to-tank hose (6) to two elbows (3) in side of control valve assembly (2) as tagged. Take off tags. Using 11/16-inch wrench, screw on and tighten two return hoses (7) and two hydraulic cylinder supply hoses (8) to four elbows (1) on bottom of valve assembly ( 2) as tagged. Take off tags. GO TO FRAME 2 18-470