Amy - I'm stumped on your CW 36 auger. Let us know how you do finally make out.
Charlie - my son sent me the pics of the red wheel weight with the old IH and C encircled emblem. I didn't know he would also asked someone else and that person would post a similar question on another site. However, I suppose I should have known.
Reggie W and Russ H - thanks for your comments. I was aware the 12" IH wheel weight also fit the Farmall Cub, but I had understood even some of the Farmall A B and C's, and even some of the Farmall Cubs used a 13" front wheel which required a slightly larger weight that looks similar but not the same. Are you saying the A B and C's use a 12" front wheel?
Lewis - ya, I figured that. The Joisey Boys are real famous for all kinds of casting stuff - mostly out of cement tho.
Don T - did you look closely at the emblem in the pic I posted? Have another look and then have a look at the emblem in your weights. I think you'll see your weights have the IH stamping done in a circular area. I doubt yours will have the large letter "C" encircling the IH. My son's weight has a definite C.
John N and Doug B - I've only used muriatic acid to clean up mortar around bricks myself, but I think there are different concentrations and suspect John probably used one that was really to strong or stronger than necessary. I'd just visit one of the big box stores and just buy a quart bottle of the strength used for mortar cleanup work.
I did see it used to clean up a crank one time by Jim Chabot when Jim and Kenny Weimann and I were rebuilding my K341 engine. Jim did most of the supervising of my rebuild, and in between he pulled the crank out of his K241AQS that had just dropped the rod. He took a small plastic container just big enough that the journal would fit in (no acid in it yet), and set it out in the middle of the floor of his shop (about 40x60) probably 20 feet from where were were working on the engines. I'm fairly certain both the overhead shop doors were open so there was plenty of venilation. Then he filled the plastic container with just enough acid to cover the journal and left it sit about 45 minutes as best I can recall. I think he checked it about every 10 min to see how it was doing. I remember looking at it twice with him and just amazed the acid was just eating away the aluminum on the crank. The smell was fairly strong when you were really close to it. I believe once the acid had removed all the aluminum Jim placed the crank in a large deep sink and washed it thoroughly with lots of running water. I'm not sure if Jim used anything else that would neutralize the acid. He may have had some baking soda or garden line mixture which can be used, and then washed it again with lots of water, then dried it and really oiled it up with lots of oil. I wasn't watching really closely since I was watching Kenny honing my cylinder and doing the valves. I guess to be really safe you should have the baking soda or garden line and neutralize any acid that might be left on the crank.
I do recall Jim measuring up the crank and deciding it was actually still within spec, which really surprised me. He put the engine back together with a new std rod and actually had it running before my engine was done (I think he could probably rebuild a Kohler K even if he was blind folded - yes he was really that good). He had been fortunate his Model 1000 Quiet Line unit with the K241AQS had been idling when the rod broke and it just stopped, which is why he thought he lucked out on the crank being fine.
So Doug, I think all you need is some real weak strength muriatic acid, and be very careful to just get it on the journal area, not the entire crank. If you want you can dilute the acid using water, but you have to be really careful and add the acid to the water very slowly. If you add water to the acid you'll get a reaction that might react sort of like boiling and splash at you. The acid will just devour any aluminum on your crank. If you dilute the acid it may take a little longer than my experience, but it will still work. You'll hear the acid as it eats the aluminum, and you'll want to check it every 10 min so you don't over due anymore than necessary. If you do it let us know how you make out.