POWER TRAINTM 5-3805-263-14&P-2ADJUSTMENT PROCEDURE FOR BACKLASHOF RING GEAR AND PRELOAD OFDIFFERENTIAL SUPPORT BEARINGSTHROUGH THE SIDE BORES IN THEDIFFERENTIAL CASE1. Disconnect the parking brake actuator by releasing it withair pressure and removing the cotter pin and pin or use airto keep the brake disengaged while adjustments are beingmade.2. Remove locks (1) and (2) on bearing nuts (4) and (6). Thesenuts are used to adjust the differential side bearing preloads.3. Insert a drive axle shaft through both side gears of the dif-ferential from the ring gear side (on nondifferentials. inser-tion in one spline is enough). Turn the shaft with a pipewrench to rotate the differential as the bearings are beingadjusted.4. Tighten nut (6) (on the side opposite the ring gear) as tightas possible by hand while rotating the ring gear with theaxle shaft. The ring gear must be rotated for the bearingsto seat properly. While tightening nut (6) and rotating thering gear periodically, rock the ring gear against the bevelgear so the backlash can be felt. An approximate backlashof .010 in. (0.25 mm) should be established by looseningor tightening nut (4) (ring gear side) while nut (6) is beingtightened.5. When the approximate backlash of .010 in. (0.25 mm) hasbeen established, rotate the ring gear and tighten nut (4)as tight as can be done with hands. Mark the position ofnuts (4) and (6) with a marking pen or something similar.6. Tighten nut (4) an additional three notches.7. An accurate backlash setting must now be made. Refer tothe Specifications section of the model being adjusted.6. To measure the pinion to ring gear backlash, mount a dialindicator with a magnetic base (5) to the end of the dif-ferential housing assembly.9. Fasten a block to one of the final drive mounting studs onthe main frame. Assemble dial indicator (5) so the indicatorplunger is against this block at a radius equal to the ringgear diameter and will indicate the rotational movement ofthe ring gear when it is rocked through its backlash withthe pinion gear.10. Adjust nuts (4) and (6) equally to obtain the specified back-lash. Check the marks made in Step 5 to assure a totalpreload of three notches from band tight to the final lockingposition has been maintained.EXAMPLE: If nut (4) has to be loosened two notches, then nut (6)should have been tightened two notches.11. Install locks (1) and (2) that hold nuts (4) and (6) in position.If the locks do not perfectly align in the notches, do notadvance the nuts more than a total of one half notch to alignthe two locks.2-134
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
