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 tion. Install a piston pin retaining ring in groove in piston at each end of piston pin. Slide cylinder (5) over piston on crankcase studs and temporarily secure wilh two extended washer nuts (fig. 3-103) positioned app1·oximately 180 degrees apart. i. When all cylinder assemblies are installed as described and illustrated in figure 3-319, install remaining cylinder extended washer nuts and torque tighten the nuts alteately to 640 pound- inches. Use· box wrench 8761562 in combination with a torque wrench as shown in figure 3-102. i.1. Hold holding bar and puller assembly (fig. 2-148.2) to prevent crankshaft from tuing, and remove'self-locking nut (3) and flat washer (4). Re- move holding bar anq puller assembly. Install holding bar and puller assembly (fig. 2-148.3) on power takeoff drive coupling (1) with boss against gearshaft, and secure with two 7/16-20UNF x 1 V2-inch capscrews (2). Alteately tighten the two capscrews and remove the power takeoff drive coupling. Remove holding ba1' and puller assembly. j. Install all cylinder deflector� (fig. 3-101) except deflectors at outside of cylinder Nos. lR, lL, 6R and 6L on cylinder assemblies. Install the ten lower cytinder deflector straps and the ten lower cylinder deflector retaining straps (fig. 3-100) and secure the lower cylinder strap on each side of the engine with ten bolts. k. Install five preformed packings on oil transfer tubes of crankcase as shown in figure 3-99. Using a suitable chain or hoist (fig. 3-98) at the crankshaft damper and oil filter housing lifting eyes, install the housing assembly on the crankcase assembly, and secure with eight self-locking nuts and flat washers. I. Apply a thin coat of gasket cement, Specifica- tion MIL-C-10523 CORD), on the oil pan flange and c 0 01 0 0 a install sealing thread (fig. 3-320). Apply a 1/16 to 11 inch bead of Specification MIL-A-46106 adhesive sealant at the split line (fig. 3-320.1) on the bottom flange of the damper housing and crankcase as- sembly. Support the oil pan adequately and posi- tion oil pan on crankcase assembly. Install one self-locking nuLand washer on each side of the oil pan to prevent pan om falling when engine is rotated to upright position. Secure oil pan (4, fig. 3-97) to each side of the crankcase assembly with 27 self-locking nuts and flat washers (3) and to the crankshaft damper and oil filter housing (2) with nine capscrews, lockwashers and flat washers (1). Secure oil par) to rear of crankcase assembly with eight capscrews, lockwashers and flat washers (fig. 3-96). Torque tighten oil pan bolts to 175 pound- inches. On model A VDS-1790-2DR, install pipe elbow (6, fig. 3-97. l), bushing (5), nipple (7), tee (4), pipe elbow (3), auxiliary generator high oil pres- sure switch (2), and high oil pressure transmitter (1). m. (Model AVDS-1790-2C only) Install generator oil inlet hose adapter (4, fig. 3-94) and connect generator oil inlet hos (3). Install generator oil drain hose adapter (2) and connect generator oil drain hose (1). n. Rotate engine stand, as shown in figure 3-321 and cover all cylinder and engine openfogs with plastic covers or suitable improvised covers. Cover twelve cylinder exhaust ports (2, fig. 3-321) twelve injector nozzle holder asse1nbly ports (1) and starter adapter opening (6). Cover oil filler and oil level indicator openings (5) and cylinder head oil drain tube openings (4). Cover oil cooler inlet and outlet h' ose opening (3) on each side of crankcase damper and oil filter housing. 0 c 0 0 0 a 0 0 f'igur 3-J4. lnslalli119 uil pan sea/i119 thnad. 3-228 Change 3 ) )