Fight fire with fire. Masonry problems are cured with masonry products. Clean crack and repair area. Get acrylic fortifier (acryl 60 etc), bag of surface bonding cement (aka b bond), and a bag of Thoroseal. Pack crack with the b bond, then skim over the damaged area. Next day 2nd coat...
I bought an old (maybe model MF) McCormick Deering Grain drill at an auction. It was froze up on every moving part almost. 1.5 gallons of WD 40 and a rubber mallet later, it's almost all working. THe seed shafts and spinners and levers etc. BUT--almost every single disc/disk is rusted...
I have above rake. it works fine but belt slips. I ordered a 7/8x140" belt for it just because I found a forum online where someone claimed that to be the size. I want to find a parts manual that shows the parts/part numbers/shcematics in it. I want to have spare bearings on the shelf...