TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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tion shown in figure 3-331, rotate engine cnk- l shaft 360 degrees and the camshaft lobes will be in , the position shown in figure 3-331. igw·e 9-331. Corrr>r:t 11usitio11 of c11ti11dt•1· IR l'all!lnrjt lul1r (c<inzs) fol')i1el i1v1·ctw11 1nw1p i11st111/uli1111 -i11:1talfrd ,.iew. c.J. Tu crankshaft using holding bar and pul- ler assembly (fig. 2-148.2) and aline "lR INJ PORT CLOSE" timing mark on flywheel with timing mark on transmission housing adapter (fig. 2-51.1). If camshaft lobes are not in the position shown in · fige 3-331, rotate engine crankshaft 360 degrees I and the camshaft Jobes will be in the position shown in figure 3-331. . Push drive coupling sleeve toward rear fan and accessory dl'ive housing, until sleeve clears splined hub. Rotate coupling sleeve until identifi- cation marks approximate the conect position to mate with injection pump drive coupling sleeve identification marks (fig. 2-53). NOTE Fuel injection pump lower right mount- ing bolt and plain washer (fig. 2-44) must be inserted in injection pump before pump is seated on mounting base. The bolt can- not be installed with pump in position. e. Install bolt and plain washer (5, fig. 3-56) in pump housing. Install pump (6) with mounting bolt and plain washer on mounting base and install three bolts and plain washers (4). Torque tighten the four bolts to 600 pound inches a · nd install lock- ing ire. f Position fuel injection pump coupling sleeves making sure timing marks on bearing retaining TM 9-2815-220-34 plate and coupling hub remain ali ned. These marks must be alined before attempting to assem- ble the coupling. Loosely install four lock plates, lockwasher, and bolts in drive shaft coupling sleeves (fig. 2-43). Insert two 5/16 in. steel rods in sleeve alinement holes (fig. 2-54). Hold fuel injec- tion pump drive coupling sleeve (neat·est the pump) stationary and rotate the other drive cou- pling sleeve counterclockwise to remove backlash from the pump drive shaft. When backlash is re- moved and flat sides of drive coupling are alined, tighten four drive coupling bolts securely. When flat sides of drive coupling sleeves do not mate when backlash is removed, the coupling sleeves must be separated and reset. Separate coupling and push sleeve of drive coupling on rear fan and accessory drive housing shaft toward drive shaft and from hub splines. Adjust sleeve on splines so nat sides of coupling halves are alined. Torque tighten coupling bolts to 375 - 425 pound-inches. g. Remove two pipe plugs from coupling and in- stall 1116 - 27 inch lubrication fitting (fig. 2-55) in one hole and lubricate coupling with MIL-G-81322 grease. Discontinue adding lubrication when grease shows in the open hole on opposite sid� of coupling. Over filling cavity will result in failure of coupling seals. Remove lubrication fittings and in- stall the pipe plugs (fig. 2-54). NOTE For instructional purposes, installation of rocker arm cove1· for cylinder No. lR is used. Remaining covers are installed in the same manner. /1. Rotate the crankshaft until the two camshaft lobes (cams) for the intake and exhaust valves for No. lR cylinder are pointed towards the cran.kshaft (fig. 3-331 and fig. 3-332). Remove pro- tective cover from fuel injector nozzle holder as- sembly opening in cylinder assembly. i. Apply a light film of sealing compound (MlL- S-45180 ORD) on valve rocker arm cover and install cover on cylinder. Identifying numbers on cover and cylinder must correspond (fig. 3-64). Valve rocker arm rollers must contact base circle of cam- shaft and lip of preformed intercylinder hoses must not be folded under cover. Tap cover gently to position cover over dowel pins. j. Install four new packings with reLainers on four bolts (fig. 3-326) and install the four bolts and torque tighten to 275 to 325 pound-inches. Secure rocker cover to cylinder head with two capsrews and flat washers (3, fig. 3-67) seven bolts and flat washers (2) and four bolts and flat washers (1). Torque tighten eleven bolts and two capscrews to 100 pound-inches. · k. Using thickness gage blade part number 10882615 as shown in figure 3-326, set intake valve Change 2 3-235