SERVICE MANUALon differential housing (Fig. 33). To adjust the backlashmove the ring gear toward or away from the pinion. Thisis done by backing off one adjusting ring and advancingthe opposite ring the same amount.Fig. 33. Setting Gear Lash1Dial IndicatorWhen original gear and pinion sets are beingreinstalled the wear pattern of the gear teeth must beconsidered in the backlash adjustment. Gears that havebeen in service for long periods form running contactswhich should not be greatly changed. If, in checkingbacklash, the amount measured is in excess of theamount shown on the ring gear, the lash may be reducedonly in the amount that will avoid overlap of the worntooth section (Fig. 34). A slight overlap at the wornsection will cause gear operation to be noisy and rough.Fig. 34. Examples of Lash Adjustment Where WornGears Are Reinstalled1Correct4Pinion Too Deep2Ring Gearin Ring Gear3Worn Section5Overlapof Ring Gear6IncorrectPreload Diff BearingsTo set the bearing preload, mount dial indicator atside of ring gear (Fig. 35). With the bearing capscrewsloosened to permit bearing movement, loosen adjustingnuts only enough to notice end play on indicator.IMPORTANTWhile gear is held in .000 end play and beforeloading bearings, check gear for runout byrevolving ring gear. If runout exceeds .2 mm(.08"), remove differential and check for cause.Tighten both adjusting nuts from .000 end play topreload the differential bearings (see "Specifications" ).Tighten bearing cap bolts to specified torque (see"Torque Chart").Recheck gear lash to make certain that the lashsetting has not been changed.Install adjusting ring locks and cotter pins.Fig. 35. Adjusting Bearing Preload1Dial IndicatorCTS-4044PRINTED IN UNITED STATES OF AMERICAPage 19
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