TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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TM 9-2815-220-34 TA2656321 Figure 2-32. 1. Re11101•ing or i11s1a/ling smoke genera Jing system fuel hose loop clamps. model A VDS-l 790-2DR engine. Cotter pin, slotted nut and llat washer 2 Front cooling fan and hub asscmbl 3 Rear cooling fan and hub assembly I 4 Self-locking nut and nat washer 8 Left front upper cover S Oil gage rod tube cap 9 Assembled washer boll 6 Assembled washer boll 10 ght rear upפr cover 7 Left rear upper cover 11 Right front upper cover Figure 2-33. Re11101'i11g or ins1all111g cooli+g fa11 upper covers, model AV DS-1790-2C a11d A DS-1790-20 engines. (6.1) On Model A VDS. . 1790-2DR open oil gage rod tube cap ( l, fig. 2"33.1) and remove oil gage indicator rod. Remove 12 self-locking nuts and flat washers (2) and four assembled washer bolts (3) attaching cooling fan shroud to top frame. Remove two assembled washer bolts (4) and remove retaining strap (5). Remove eight assem" bled washer bolts (6) and lift left front upper cover assembly (7), with oil level indicator tube cap attached, from the oil Jcvel indicator tube assem" bly. Remove and discard the two preformed packings from the tube cap neck. Remove eight assembled washer bolts and remove the left rear upper cover (8). Remove five assembled washer 2-46 Change 3 bolts (9) and remove cover adapter (10). Remove IO assembled washer bolts (1 I ) and remove right I rear upper cover (12). Remove 12 assembled washer bolts (13) an remove right front upper cover (14). (7) Remove five assembled washer bolts and two loop clamps (fig. 2-34) attaching cooling fan shroud to left and right front shroud. (8) At rear of engine remove four self-locking nuts (not shown) and four assembled washer bolts (1, fig. 2-35), securing the fuel retu tube clamps to the inside of the shroud. Remove the three remainjng assembled washer bolts (2) securing the cooling fan shroud to the rear shrouds. Remove cooling fan shroud and fan housing. (9) Remove 12 self-locking nuts (not shown) and machine bolts (fig. 2-36) and associated plates and clamps from left bank injector tube clamp supports at No. l L through 6L cylinders (1, fig. 2-37). Remove clamps from supports at No. 1R through 6. R cylinders in the same manner. (10) Remove eighteen self-lockh1g nuts and machine bolts (1, fig 2-37) and associated plates and clamps from fuel injector tube clamp brackets (2). Remove twelve self-locking nuts and machine bolts (3) and associated plates and clamps from fuel injector tubes. Remove two self-locking bolts ( 4) and remove plate ancl clamps from fuel injector tube clamp bracket. (11) Using crowfoot ad�pter, loosen 12 fuel injector support nuts (fig. 2-38) and disconnect 12 fuel injector tube nuts from fuel injector nozzles. (12) Loosen 12 fuel injector support nuts (fig. 2-39) and disconnect 12 fuel injector tube connectors from fuel injection pump. Remove fuel injector tubes and install ps (l, fig. 2-40) in fuel iJ1jection pump tube openings.