Eaton Axle and Brake Service Manual. 2-Speed and Double ...

Section 3ASSEMBLY / ADJUSTMENTDrive AxleOverhaulPinion Bearing Preload Adjustment(Trial Build-Up Test).The pinion bearing spacer thickness controlsbearing preload. The spacer size forcorrect preload can be predetermined byusing a "Initial Build-Up" procedure asdescribed below:1. Assemble pinion bearing cage, cups andbearing spacer... (without pinion or oil seal).See illustration for pacerwasher application.Use nominal size spacer (see chart).NOTE: During assembly procedure, centerbearing spacer between the two bearingcones.2. Lubricate bearings and place the assemblyin the press. Position sleeve or spacer sothat load is applied directly to the backfaceof the outer bearing cone.3. Apply press load to the assembly (seechart). Wrap soft wire or strong string aroundthe bearing cage, attach spring scale andpull steadily. Preload is correct when torquerequired to rotate the pinion bearing cage isfrom 10-20 LBS. -IN. (1.1-2.3 N.m). Thisspecification is translated into spring scalereadings in the chart below.4. If necessary, adjust pinion bearingpreload by changing the pinion bearingspacer. A thicker spacer will decreasepreload. A thinner spacer will increasepreload.22