Which of the following actions should be taken if during a routine maintenance inspection of a centrifugal pump, localized scoring on a pump shaft sleeve is detected?（）<br>A:Correct the cause of the scoring and repair the sleeve or replace with a new one<br>B:Reassemble the unit and provide more water leak off for proper lubrication<br>C:Check for parallel alignment of the sleeve radial faces to the sleeve bores<br>D:Reassemble the unit and adjust the governor to obtain a slower speed

Which of the following actions should be taken if during a routine maintenance inspection of a centrifugal pump, localized scoring on a pump shaft sleeve is detected?（）
A:Correct the cause of the scoring and repair the sleeve or replace with a new one
B:Reassemble the unit and provide more water leak off for proper lubrication
C:Check for parallel alignment of the sleeve radial faces to the sleeve bores
D:Reassemble the unit and adjust the governor to obtain a slower speed

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