Upside down brazing is neither fun nor reasonable for a good welder. There are really good cast iron welding rods available from a welding supply store (not the normal ni-rod, which does work in some cases, but this material is much better) It is also not an amature welder rod. Your issue is going to be getting the oil out completely. Welding, brazing, or JB weld, do not work when oilyconditions are present. Were it mine, I would use metal stitching. It is a process that uses overlapping metal plugs to seal the crack. In your case (no pun intended) the crack is not structural, so the integrity of the housing will not be affected. I would purchase black iron 1/8" pipe plugs (for natural gas service) from a hardware store and (with care to start at the very beginning of the crack) I would drill and tap a series of plugs into the housing. Each plug must be tightened in with locktite to prevent leaks and turning. The square head on the plug is then ground off and made flush with the housing. The next plug is then driled and installed overlapping the first, and aligned with the crack. continue in this along the crack until the end has been reached. grind off the last plug to match the housing and smooth with a flap wheel or body file. Stippling the smoothed area with a dull center punch can immitate the sand pattern of the casting. Paint and fill. Jim
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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