TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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) LD for fig. 3-72 continued: 13 Plain nut lG Ring 14 cashcr 17 Packin 15 Fuel injection pump coupling 18 el inJcction pump coupling hub sleeve (4) Remove plain nut (12, fig. 3-232) and lkwasher (11) attaching fuel injection pump coupling hub (10), ring (9) and sleeve (4) to fuel injection pump gearshaft (2, fig. 3-71). Remove hub, ring, and sleeve from gearshaft and remove woodruff key (56) from gears haft. NOTE The splined coupler halves are a matched set. (5) Remove seven self-lking nuʦ (7, fig. 3-?) and flat washers (8) and separate rear fan drive hous- ing (2) and accessory drive housing (51). Remove three pipe plugs (2, 52 and 40, fig. 3-231) from rear fan drive housing and pipe plug (&) from accessory drive hous- ing. (6) Remove fuel injection pump gcarshaft (2) from rear fan drive housing. Remove fuel injection pump I gearshaft oil seal (8) and retnining ring (7) from rear fan drive housing, if inspection (para 3-98) reveals the need for replacement. Remove fuel injec tion pump driven gearshaft needle bearing (6, fig. 3-231 ). (7) Position fuel injection pump gearshaft (fig. 3-73) in arbor press and press gearshaft from ball bearing using press plate to support bearing. Remove bearing recessed washer (51, fig. 3-71) from shaft. (SS L1\ 11 tl i(Rl I figure 333. Rcwovg fᵫl i11jcctio11 f111mp gcars/1aſt ba /,cari11g. TM 9-2815-220-34 d. Rear Fan Driue Housing Clutch As se mbl y . Dis- assemble clutch assembly as outlined in paragraph 3-91. e. Fuel Injection Pump A(foance Assembly. (1) Remove fan drive bevel gearshaft (8, fig. 3-70), shim (9), ball bearing (10) and support (11) from flywheel end fan drive shaft (6) as an aembly. , Remove bearing supporL from ball bearing. Press fa11 drive bevel gearshaft from ball bearing and remove and retain shims (9) for use during assembly. NOTE Before removing bolts securing the compo· ncnts of the advance assembly, check alinc- ment and legibility of scribe marks on ad- justing ring boss, flyweight, and drive gearshaft flange (fig. 3-ê). The marks must be alined to insure proper assembly. If the scribe marks are not alined, scribe a new line on the geahaft flange in alinemcnt with the ring boss scribe line. Identify the new line using a prick punch dot or some other meth. The new gear flange mark and ring boss must be in alinemenl for proper assembly. l I njeclion driven gcahafl hub clamp 2 Bolt 3 king wi 4 Slolld nul 5 Adjusting ring 6 Flyweighl Figure 334. He111i11g +dv11ce )1VCilll atljusti11g ri11g ouc/ i11jcctlo11 pump drive geors/1nft. Change 3 3-137