TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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(3) Refer to figure 5-131 and install fan and advance unit housing sling - 4910-795-7954. (4) Refer to figure 7-17 and install rear fan and accessory drive housing with clutch assembly. 1. Lower the rear fan and accessory drive housing assembly (A) until holes in housing aline with studs in mounting base. 2. Continue lowering housing until accessory drive bevel gearshaft gear teeth (B) engage with the gear teeth of the accessory drive gear. 3. Refer to figure 5-131 and remove lifting sling (C) after rear fan and accessory drive housing are positioned. Figure 7-17. Installing rear fan and accessory drive housing using fan and advance unit housing sling-4910-795-7954. (5) Refer to figure 5-130 and torque tighten the 12 self-locking nuts (A) to 275 pound-inches. Refer to figure 5-129 and torque tighten 14 self- locking nuts to 275 pound-inches. b. Fuel Injection Pump Mounting Base. (1) Install new preformed packing on oil transfer tube in crankcase (fig. 5-128). (2) Refer to figure 5-127 and torque tighten four bolts to 750 pound-inches. c. Front Fan Drive Housing with Clutch Assembly and Mounting Base. (1) Install new preformed packing at oil transfer tube in crankcase assembly (fig. 5-126). (2) Apply a thin coat of gasket cement (MIL-C-10523 Ord.) on the mounting base lower mounting surface. (3) Refer to figure 5-125 and torque tighten ten slotted nuts and two cap screws to 275 pound-inches. (4) Position cover adapter (58, fig. B-26) on front fan drive shaft cover (57). Similarly, position adapter (58) on rear fan drive shaft cover (62). (5) Join the two shaft covers (58 and 621 using rubber hose (61) and two hose clamps (60). Tighten hose clamps just enough to hold the covers together as a unit. Install a preformed packing (56) on adapter end of each shaft cover (6) Install retaining ring (55) on front far drive shaft (54). Note. Do not install retaining ring in groove located on the front spline. Ring must be located beyond the spline at this time. (7) Install front fan drive shaft with retaining ring, in front fan drive bevel gearshaft (50.1) of front fan drive housing and clutch assembly. Long spline must enter gearshaft. Install the assembled drive shaft covers i), above) over the front fan drive shaft, with Irt housing toward front fan drive housing as shown in figure 7-18. 7-13