TM 9-2320-209-20-3-1 1. Using 9/16-inch open end wrench, hold nut (1) on fuel return hose (2). 2. Using 7/16-inch open end wrench, screw in and tighten nut ( 3) from return tube (4) into hose (2). 3. Using 9/16-inch open end wrench, hold nut (5) on fuel supply hose (6). 4. Using 7/16-inch open end wrench, screw in and tighten nut (7) from supply tube (8) into hose (6) . NOTE Follow-on Maintenance Action Required: 1. Replace intake air cleaner. Refer to para 4-3. 2. Reconnect battery ground cable. Refer to para 7-58. 3. Operate engine manifold heater. Refer to TM 9-2320-209-10. 4. Check all manifold heater fuel lines and fittings for leaks. 5. Turn off engine manifold heater. Refer to TM 9-2320-209-10. END OF TASK TA 082250 4-120