REDUCTION DIFFERENTIAL: INSPECTION Reduction Gear Face Runout
Tooth Contact
Using a dial indicator, check the reduction gear for face runout at the maximum radius position in back of the gear. If the runout exceeds the limit, check the reduction gear bolts for tightness; retighten if necessary. Check the tapered roller bearings for condition. Readjust or replace them if necessary.
Check the gear reduction tooth contact. To check, apply a thin coat of bluing to several gear teeth on both drive and coast sides. Press forward on the reduction pinion and rotate the reduction gear back and forth until a contact pattern is noted on both concave and convex faces of the gear teeth. To adjust the tooth contact, refer to the chart.
Face runout of reduction gear
A
0.05 (0.0020) maximum
B
0.05 (0.0020) maximum
Unit: mm (in.) A = Assembly Standard B = Repair or Service Limit
200250
200249
2.16