TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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I 2-27. 011 Coolers NOTE Tite oil coolers on each side of the engine are removed in the same manner. For instructional purposes removaJ of the right coolers is described in the fol lowing i n struc tions. Model AVDS-1790-2DR oil cooler removal and installation instructions are similar to those described below except that thjs engine is not equipped wth an engine wiring h:iess, nor the oil sampling system shown in figure 2-70. TM 9-2815-220·34 a. Remal. (1) Remove four capscrews and lockwashers (5, fig. 2-70) and remove two retaining straps (4). Remove four assembled washer bolts (I) and wiring haess bracket (2) and wiring haess (3) as a1� assembly. (1.1) Remove engine oil line coupling nut (8) from vent line tee (9). Remove trallSmission oil H11e coupling nut (7) from transmission oil cooler adapter (6). Remove adapter (6) and retain for installation in new oil cooler. Remove and discard prefor med packing. 6 TA26564ll I Assembled washer boll 2 Wiring harness bracket 3 Wiring harness 4 Retaining strap 7 Transmission oil line 8 Engine oil line 5 Capscrcw and lockwashcr 6 Adapler 9 Tee Figure 2-70. Removing or f11stal/i+g wiring harness, Model A JIDS·I 790-2C and A DS·l 790·20 engines. (2) Remove four assembled washer bolts (fig. (4) Remove four machine bolts (6) and remove 2-71) and remove wiring haess bracket assembly engine oil cooler screen (7), damper end oil cooler and transmission oil cooler screen. screen bracket (8), center oil cooler screen · bracket (3) Disconnect oil cooler inlet hose (1, fig. 2-72) and oil cooler outlet hose (2) and drain oil into a suitable container. Disconnect oil cooler vent hose elbow (3). Remove oH cooler vent hose I tee (4) and retan for installation in replacement cooler. Remove and discard preformed packing (5). (9) and engine oil cooler (10) as an assembly from oil cooler support frame. (5) Remove two ;,rnchine bolts (11) and remove transmission oil cooler screen bracket (12). Remove two machine bolts and flat washers (13) and re- move transmission oil cooler (14) from oil cooler support frame. Change 3 2-67