TM 10-4320-307-244-6SPEEDINCREASERREPAIR(CONT).NOTEDo not heat the gear nor cool the shaft.(4) If advance is in acceptable range, press gear onto shaft so that it is flush with shoulder on shaft at small endof taper. The gear must be advanced to within +0.000/-0.002 inch (+0.000/-0.05 mm) of the shaft shoulder.NOTEInner races of tapered roller bearings may bepressed on cold, or heated in a 275°F (134.7 C)oven for not more than 30 minutes. If the bearingsare heated, they must be seated with a press aftercooling.g.Install tapered roller bearing outer race (12) intogear front housing (8).h.Install tube support bracket (13) with twolockwashers (14) and two screws (15) onto fronthousing (9).i.Connect nut (16) and torque screws to 27 2 ft-lbs (36.60 2.71 Nom).j.Install front baffle (17) and secure with fourlockwashers (18) and four screws (19).Torquescrews to 27 2 ft-lbs (36.60 2.71 N.m).CAUTIONSpecial tools for seating tapered roller bearingsmust have inside diameters slightly larger thanthe shaft, and outside diameters small enoughnot to touch the cages and rollers.NOTEInner races of tapered roller bearings may bepressed on cold, or heated in a 275°F (134.70C)oven for not more than 30 minutes. If the bearingsare heated, they must be seated with a press aftercooling.k.Install inner race of bearing (20) over front ofinput shaft (11) and seat. Install inner race ofbearing (21) over rear of input shaft (11) andseat.I.Install inner race of bearing (22) onto rear ofoutput shaft (23) and seat.m. Install inner race of bearing (24) onto front ofoutput shaft (23) and seat.4-28
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