I had originally sought a replacement (see wanted section discussion) but thinking I may as well think about reconditioning the existing one first. Background is that this belongs to my 1850 auto project, spun over the engine, which generated enough oil pressure for it to leak (a goodly amount!) of oil through the slot.
I'm guessing £20 for an engineering works to skim the impeller bottom face, but the spindle is a bit cruddy near the water flinger (it's not dirt, corrosion?), which I'll need to remove to change the bearing and oil seal. Everything seems to be in a good condition as such, gear teeth, bearing still smooth, oil seal intact so not sure why it was passing that much oil.
What does collective wisdom say, keep or chuck?