The gears were finally repaired during the November outage. Here is what was found.
Gear # 8.5 had a loose bearing fit on the outer race of one bearing. Inspection of the bearings also revealed an inner race defect in the NU1030 bearing. A new housing was installed and the bearings were replaced.
Gear # 13 was found to have severe tooth wear from gear misalignment. This gear assembly was replaced.
Gear # 13.5
The gear shaft/pin was found to have a loose fit in the outer machine frame housing. This caused the gear to be misaligned. The gear shows severe tooth wear on outer 1/3 of each gear tooth and moderate wear on the other 2/3 of each tooth. The machine frame was bored out and an adapter/repair block was machined to restore proper gear alignment. A longer shaft/pin was made to accommodate the added width of the block.
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