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 (6) Apply a thin coat of gasket cement Specifica- tion MIL-C-1057 (ORD) on the rear fan drive housing (2, fig. 3-70), install accessory drive housing (51) on rear fan drive housing and secure with seven self -lk- ing nuts (7) and flat washers (8). Install three pipe plugs (2, 40 and 6, fig. 3-71) in rear fan drive housing I and pipe plug(3 I )in accessory drive housing. ( Install wruff key (8) in fuel injection pump gearshaft (2). Install fuel injection pump coupling hub (10, fig. 3-72), ring (9) and sleeve (4) on gearshaft as an assembly. cure coupling assembly to rearshaft with plain nut (12) and lkwasher (11). Torque tighten nut to Z0 pound-inch. NOTE The splined coupling halves are a matched set. Make certain the coupling half being in- stalled matches the coupling half on the fuel injection pump. (8) Pition original shims (+, fig. 3-71) on end of inner bearing (side opite bearing trade mark) of lower driven gearshaft ball bearing (13). Measure the total thickness of bearing race and shim, from shim on inner race to upper face of outer race with end play removed. Thickness should be from 1.2635 inch minimum to 1.2655 maximum. When total thickness is greater than 1.ĉ5 inch, strip 0.2 inch thick lamina- tions from the shim pack until the correct thickness is obtained. When totl thickness is less than 1.ć5 inch add 0.2 inch thick shims (stripped from a new shim pack) as necessary. Figure 3-93 illustrates shim la- tion and measuring points. (9) Position shim (+, fig. 3-71) of predetermined thickness on inner race of lower driven gearshaft ball bearing (13) and press fan driven bevel gearshaft (17) into ball bearing. Install bearing spacer (,) on fan driven gea�haft and start upper driven gearshaft ball bearing (11) on gearshaft and press gearshaft into ball bearing. Secure upper ball bearing on gearshaft with retaining ring (10). (10) Install assembled fan driven gearshaft, in rear fan drive housing (4) and secure with bolt (16) new key washer (15) and lk plate (14). Bend tab on washer. � (11) Install oil transfer plug (25) i n camshaft drive gearshaft (26). Install key washers (24) and gcarshaft plug (23), torque tighten plug to 13-14 pound-inches and bend tab on washer to secure plug. (12) Install a new preformed packing (35) on right camshaft drive inner support ($). Install camshaft drive gearshaft assembly (6) in accessory drive hous- ing (4) and install support in housing and on gearshaft assembly. cure support to accessory drive housing with three self-lking nuts (&) and flat washers (%). Install left support and gearshaft in the same manner. e. Rear Fan and Accessory Driue Housing. Assem- ble rear fan drive clutch as outlined in paragraph 3-^. f Clutch Couer Bearing and Verti,cal Driue Shaft 3-154 Change 2 Oil Seal. Install vertical drive shaft oil seal as outlined in paragraph 3-^. Install clutch cover bearing and clutch cover on clutch assembly as outlined in paragraph 3-94. g. Rear Fan and Accessory Driue Housing Assem· bly. NOTE Before installing assembled fuel injeclion advance assembly and fan drive bevel gearshaft, check gearshaft backlash and re- shim if necessary (fig. 3·79). Be sure bear- I ing cap and accessory drive housing stamped numbers correspond to their proper lation before assembling (fig. 3-95). Figure J.255. lmtall f+e/ i11jcctio11 adi:a11ce bearing cap. ) (1) Install assembled injection pump advance as- sembly (+, fig. 3-70) in rear fan and accessory drive housing and secure front fan drive bevel gearshaft bearing support (11), injection driven gearshaft hub clamp (42) and accessory driven gearshaft hub clamp (.) to rear fan and accessory drive housing with six slotted nuts (-) and cotter pins (/). (2) Install injection advance bearing cap (=) and } secure accessory drive housing (51) with two coLler pins (32) slotted nuts (31) and flat washers (30). Install four new preformed packings (63) on oil transfer tubes. (3) Install assembled fan drive housing cover in ) rear fan drive housing (2) as outlined in paragraph 3-94. (4) Install fan drive oil seal housing on fan drive housing cover as outlined in paragraph 3-94.