PIVOT FATIGUE
Axial vibration can cause damage and fatigue of tilting pad pivots, both pivot and carrier ring suffering damage by indentation or fretting. In some cases tiny cavities of almost hemispherical form may be produced. Damage may occur due to axial vibration imposed upon the journal, or may be caused by thrust collar face running out of true. 

TILTING PAD THRUST BEARINGS 
Fig. 42 - Pad carrier ring showing damage due to axial shaft vibrations. 

Fig. 43 - Pad pivot showing hemispherical cavities caused by pivot fretting due to vibration.

RECOMMENDED ACTION 
Recondition carrier ring, and fit new or reconditioned pads