CHAPTER 4: MAINTENANCE OF MAIN ENGINE FUEL, AIR INTAKE,TM 9-2350-256-20AND EXHAUST SYSTEMS4-13 REPLACE FUEL CHECK VALVE- Continued5Disconnect fuel filter inlet tube (10) and elbow (11) from tee (12).6Remove coupling (9), filter (13), bushing (14), and tee (12) from fuel check valve (5).7Remove fuel check valve (5) by removing two screws (15), two lockwashers (16), and two flat washers (17).8Remove bracket (18) with two nuts (19) and two flat washers (20).b. INSTALLATION1Install bracket (18) with two flat washers (20) and two nuts (19).2Install fuel check valve (5) with two screws (15), two new lockwashers (16), and two flat washers (17).3Install tee (12), new bushing (14), filter (13), and coupling (9) to fuel check valve (5).4Connect elbow (11) and fuel filter inlet tube (10) to tee (12).5Connect manifold heater purge fuel line (8) to coupling (9).6Connect fuel pump outlet hose (6) and adapter (7) to fuel check valve (5).7Connect adapter (4) and elbow (2) to fuel check valve (5).8Connect fuel inlet hose (1) to elbows (2 and 3).c. TEST1Turn MASTER switch and fuel pump switch to ON position.2Purge fuel system (refer to TM 9-2350-256-10).3Operate engine (refer to TM 9-2350-256-10). Inspect fuel check valve (5) and connections for leaks.4Shut down engine. Turn MASTER switch and fuel pump switch to OFF position.NOTEFollow-on maintenance:Install engine deck (see paragraph 9-51)4—30
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