TM 9-2320-289-346-15.REAR AXLE DIFFERENTIAL MAINTENANCE (ALL EXCEPT M1009) (Con’t).NOTEAt this point, side bearings are preloaded. If any additional adjustmentsare required, ensure that preload remains as established. If 1 adjusting nut(8) is loosened, the other must be tightened an equal amount to maintainthis preload.8.Mount dial indicator (22) on housingand measure backlash between ringgear (4) and drive pinion gear. Rockring gear back and forth to measurebacklash.Backlashshould bebetween 0.003-0.012 in.(0.076-0.305 mm)with(0.1 27-0.203 mm)NOTEIf adjusting nut0.005-0.008 in.preferred,(8) requiresadjustment, bolts (2 and 5) mustbeloosened.Oncefinaladjustmentshave been made,bolts must be retightened toproper torque.9 .If backlash is more than 0.012 in.(0.305 mm), loosen right adjustingnut (8) 1 slot and tighten left adjustingnut 1 slot. If backlash is less than0.003 in. (0.076 mm), loosen leftadjusting nut 1 slot and tighten rightadjusting nut 1 slot. Remove dialindicator (22) from housing.NOTEIf ring gear (4) and drive pinion were replaced, perform steps 10-13 tocheck for proper gear tooth contact pattern.10.Wipe any lubricant from housing and clean each tooth of ring gear (4).11.Using a medium stiff brush, sparingly apply prussian blue dye to all ring gear (4) teeth. Area ofdrive pinion tooth contact should be visible when drive pinion is engaged by hand.NOTEExcessive turning of ring gear (4) is not recommended. Ring gear shouldbe turned only enough to provide tooth contact pattern,12.Apply load until it takes a torque of 40-50companion flange so that ring gear (4) turnsturns 1 full revolution in opposite direction.Ib.-ft, (54-68 N.m) to turn drive pinion. Turn1 full revolution, then reverse so that ring gearTA505886-102
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