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dmcmmc

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Reply with quote  #76 
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.

Attached Images
jpeg G-8.5_NU1030.JPG (247.10 KB, 18 views)
jpeg G-13.JPG (216.96 KB, 18 views)
jpeg G-13.5(1).JPG (219.06 KB, 18 views)
jpeg G-13_Repair_Block.JPG (255.14 KB, 18 views)

Sinski

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Reply with quote  #77 
This is some good stuff. Would be good to see followup data and compare the improvement. Would also be good now that you know what the faults are to compare this with the data you took and have a look.
dmcmmc

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Reply with quote  #78 
Here is the latest vibe data on gears 8.5, 13 and 13.5.

This just serves as a reminder to me that if the seemingly small things are not fixed they can grow to havoc inducing problems.

 
Attached Files
docx 11-28-16_Readings.docx (57.76 KB, 14 views)

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