TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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TA0217GS Fisure 2·11. Remoui11g or imrallins ge11era1or driue gear adap1er and associated parts, model AJIDS.J190-2C e11gi11e. washer in g�nerator (I 7) using new preformed packing and tighten locking nut (2). Install oil retu hose union (5) in. generator using new preformed packing. Install oil drain tee (8), drain tube elbow and nipple (9), vent restrictor ( 12), and vent hoe adapter (I l ) in generator. NOTE It is of utmost importance that the generator support and cradle assembly be installed in a manner that will not disturb generator mount- ing alinement and still fuish adequate support to minimize vibration. Misalinement of 0.010-in. in any direction is sufficient to cause a leak (pressure loss) between the generator mounting flange and the generator mounting adapter. (d) Install generator (17). Be certain genera- tor spline is properly alined with generator drive gear assembly, and one retaining strap is located behind the generator. Install "V" band clamp (16) and tighten nut (15). ( e) Position the assembled generator support (20) and cradle assembly (18) on oil pan and install three capscrews and Oat washers (19). Tighten screws only until heads engage washers I (finger-tight). Loosen two screws (21) allowing cradle to move freely in elongated holes n the support. Position retaining straps (14) over genera- l tor and secure with nuts (13). Tighten two screws (21) securing cradle to support. Tighten three capscrews (19). TM 9·2815-220-34 ) Connect vent hose (I 0) to vent hose adapter ( 11), front oil drain tube to drain lube tee (8) and elbow (9), and rear oil drain tube (6) to oil drain tee (8). Connect oil retu hose (4) to oil return hose union (5) and oil inlet hose ( I ) to oil inlet elbow (3). NOTE Most A VDS-1790-2C engines were built with the electrical leads (ground, fig. 2-14) secured to a common capscrew at the generator support. When installing the electrical leads (ground), each lead must be secured with an individual capscrcw. ( g) Clean electrical leads (ground) terminals. Install one flat washer in the generator support upper counterbore (fig. 2-17.1). Secure the inner lead with one Oat washer and capscrew. Remove lower right generator support capscrew and Oat washer. Discard capscrew. Tnstall one flat washer in generator support counterbore. s�cure the outer lead with one Oat washer and new capscrew (3/8-24 x 1-3/4 long). Torque tighten capscrews to 275 pound inches. Clean ground lead ends and hardware. Apply a liberal coating of silicone rubber, air-drying adhesive (MIL-A-25457) to the ground lead ends and attaching hardware. Optional materials include Dow Coing coating compound No. 3140 or RTV 3145; Dow Coing A-4000 also meets specification MIL-A-25457. 3/8-24 X 1·3/4 CAPSCREW i126227 re 2·17.1. /11stolli11g e/ectrlco/ fead (o1111d) (h) Connect wiring haess electrica I leads (6 and 7, fig. 2-14). Install assembled electrical lead (ground, 4) on generator terminal and secure with self-locking nut and nat washer (3). Install assembled wiring haess cable (2) on generator Change 3 2-37