Does anyone know what what used to pack the final impeller shaft, to keep the oil in the gear housing? Would oakum, like plumbers use to pack castiron sewer pipe work? The impeller shaft is the lowest on the gear housing and as such it would sure tend to leak oil into the scroll cage. There is a 'snout' on a gear alignment frame that is bolted to the inside of the gear housing. This cylindrical snout inserts into a cylindrical opening on the impeller side gear housing, so I imagine there can be generated some compression to form the packing against the 1/2 in shaft. Any info would be appreciated.