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Pre lube is being used from 500gal tank prior to starting. Bearing failures are occurring below static level. Top two picture shows an intact bearing. Bottom two are just above the turbine and have been worn completely away.

Pump bearings have been bronze each time. The vesconite bearings on the spiders have straight flutes vertically down not spiraled like cutless rubber.

Hi. We are having issues with low reliability on a vertical turbine pump used for irrigating nursery stock. We had a failure the other day requiring is removal. It moves 700gpm at 640TDH with 290ft of column and an open lineshaft. Upon removal it was found that the bearings in the pump had...