TM 9-2520-246-34 f. See Install idler gear assembly and idler gear shaft. figure 3-29 for positioning of idler gear shaft. g. Install mainshaft. (See fig. 3-28.) h. Install the fourth-and fifth-speed synchronizer on mainshaft, (See fig. 3-27.) i. Install mainshaft rear bearing. Use a wooden block and mallet to drive bearing into place. See figure 3-26 for positioning of rear bearing. j. Install the input shaft and input shaft bearing cap using a new gasket. (See fig. 3-25.) Tighten the four capscrews to 13-17 lb-ft torque. k. Install countershaft rear bearing cover using a new gasket. (See fig. 3-23.) Tighten the four capscrews and lockwashers to 25-32 lb-ft torque. l. Install power takeoff opening cover using a new gasket. (See fig. 3-24.) Tighten the six capscrews and lockwashers to 10-15 lb-ft torque. m. Install mainshaft rear bearing cap assembly using a new gasket. (See fig. 3-22.) Tighten the six capscrews and lockwashers to 25-32 lb-ft torque. n. Install companion flange. Coat companion flange bearing surface with a light coating of grease, artillery and automotive (GAA), MIL-G-10924. Slide the gears on the mainshaft to lock the transmission shafts from turning. Tighten companion flange retaining nut to 120-150 lb-ft torque. Install new cotter pin to secure nut. Be especially careful not to damage rear bearing cap seal. See figure 3-21 for positioning of companion flange. NOTE After applying torque, tighten nut to closest cotter pin hole. o. Place shifter forks in cover, and place transmission gears and synchronizers in neutral position. (See fig. 3-20.) Install shifter shaft cover using a new gasket. Be sure cover assembly is seated and tighten the eight capscrews and lockwashers to 25-32 lb-ft torque. (See fig. 3-19.) p. Install clutch bell housing using a new gasket. Tighten the five capscrews and lockwashers to 60-80 lb-ft torque. (See fig. 3-18.) q. Install the clutch release yoke, yoke keys, and clutch release shaft. Tighten the two capscrews and lockwashers to 40-50 lb-ft torque. (See fig. 3-16 and 3-17.) r. Install the clutch release bearing support assembly and secure in position using the two support springs. See figure 3-16 for positioning of springs. 3-20