TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download

TM 9-2815-220-34  (   >       0  (  . z  0 -14 12 -10 -8 -6 4 -2 ' -0 ' 200 I  , ' ' � � ,  . ' � 600 I � .  )    �  (  � K y " ' " ' � ",  1000 I  ' . '    '   v ' . ' ' .   ' .  i y     �      A    T 1400 1800 2200 2600 I        INJECTION ADVANCE UNIT RPM TA022013 Fire 3-252. Fl injector nce 1it ce (15) Tum spd regulator control (10, fig. 3-ú) to ro (0),  reduce speed, and counter switch, motor switch, and master switch handle to the "OFF" i- tion. WARNING Injection pump advance �mbly l be hot following t. Operator should wear glov when removing unit from tt stand. (16) en fasteners and remove cover. Remove aring  and remove unit from nch. Remove oil transfer shaft. Place injtion advance assembly on oil drain tray with email gear end up to drain and cꝏl. Place advance aembly in a clean dirt fr container, preferable a polyethelene bag, for storage. (17) Repeats (9) through (14) abve to check pre- vious readin. If advance asmbly fails to pa the tt, it must be adjus. Note whether advance �m- bly advanc o on or o late. Either condition can normally  corrted by rotating the advance flywhl adjusting ring (fig. 8-91). NOTE The advance ambly should be retarded slightly if the advance vari more than 2 d at P0 rpm when the oil psure drain button is dep�ed. This variance in- dicates the mhanical retard stop is not in phase with the hydraulic valve. (18) Push speed control stop switch to disengage dy current clutch. Turn counter, motor, and motor starter off. (19) en fteners and remove cover. Remove two cotter pins, and ln the two slotted nuts enough 3-152 Change 3 to permit adjusting ring rotation (fig. 8-21). . NOTE  not turn the adjusting ring more than 1116 of an inch during any one adjustment. () Rotate the adjusting ring (fig. 3-91) 1/16-inch toward the rear of the bench (rerd ition) if the ad- vance assembly advanced o on. Move the adjusting ring 1/16-inch in the oppite dition (advance pi- tion) toward operator, if the advance asmbly ad- vanc o late. Tighten the slotted nuts, install cover and reפat (3) through (14), ave. When advance read- in are within the prcribed limits, the advance as- mbly may be removed from the bench as outlin in (16) above. cure the adjusting ring slotted nuts with cotter pins. NOTE If the advance ambly cannot be properly adjust as outlin ave, the flyweight sprin must  chk in accordan with �imits sפcified in table 3-24. d. Rear Fan and AccBo Dve Ho. (1) Install flywheel end fan drive shaft (6, fig. 3-æ) in injection automatic advance aembly (+). (2) Pition 01iginal shims (9) on end of inner ar- ing race (side opite bearing trade mark) of rear fan drive vel geahaft ball bearing (10). Measure total thickns of bearing ce and shim, from shim on inner race to face of ter race, with end play removed. Thickness should be from 0.7Y1 inch minimum to 0.7911 Inch maximum (fig. 3-ý). When total thickn· is more than 0.7911 inch, strip O. inch thick lamina- tion from the shim pack until the correct thickns is ) ) )