TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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I I Self-locking nut 2 Qamping bar 3 Screw 4 Bolt and Oat washer 5 Support TA265627 G 6 Cradle 7 U bolt 8 Hose clamp 9 Boot clamp !O Boot Figure 2-21. Removing or i11stol/i11g generator. model AV DS-1790-20 and A JIDS·l790-2DR engines. rotation of generator to aline the large openings in the elongated mounting slots. (g} Rotate generator counterclockwise until large elongated openings in flange are alined with mounting nuts and remove generator and boot. Remove boot from generator. Remove six self- locking nuts. (2) Installation. NOTE Apply silicone compound (MIL-S-8660) to the inside of the generator boot sealing surfaces before installation. (a) Install but do not tighten six self-Jocking nuts. Loosely install genel'ator boot on generator so that the mounting access openings (fig. 2-22) are exposed. Position generator so that large elon• gated openings in flange are alined with mounting nuts and install generator and rotate coun- terclockwise and tighten six self-locking nuts using box wrench Part No. 10935476. (b) Install exhaust tube hvse clamp (8, fig. 2-21) on generator boot (10), rotate boot to position shown and tighten exhaust tube hose clamp. Install two generator boot clamps (9). NOTE It is of utmost importance that the generato1· support, cradle, and "U" bolt be installed in a manner that l not disturb generator mounting alinement and still furnish adequate support to minimize vibration. Misalinement of 0.010 in. in any TM 9-2815·220·34 direction is sufficient to cause a leak (pressure loss) between the generator mounting flange and the gene1·ator mounting adapter. Figure 2-22. ose11it1g or tigfite11ing generator mo1111ting 1111rs. model A VDS·l 790·2D a11d A VDS-1790-2DR e11gi11es. (c) Position the assembled generator cradle (6, fig. 2-21) and support (5) on the oil pan and illStall four bolts and Oat washers (4). Tighten bolts only until heads engage washer (fgertight). Loose11 two screws (3) securing cradle to support I allowing cradle to move freely in elongated holes in the support. Install "U" bolt (7) over generator and secure with two clamping bars (2) and two self-locking nuts (1 ). Tighten two screws (3) I securing cradle to support. Tighten four bolts ( 4 ). (d) Install widng haess (6 , fig 2-20) 01� blower notor connection. Install capscrew and lock washer ( 4) on electrical lead (5) and secure to crankcase. Install elecfrical lead (2) on generator terminal and secure with self-locking nut and flat washer (l ). Install electrical lead on generator cradle and secure with screw and flat washer (3). I Change 3 2-39