There are a lot of companies that manufacture grouser bar which you can weld to your track shoes, to bring them back up to new height. I'm quite sure this stock is hardened to a rockwell designated hardness, probably varies by Mfr. I'm not sure what the reccommended type welding method & materials would be for this, but have read that a wire feed would make this job go faster, saw it done with stick before, not sure of the electrode & set up though, also know you should tack both sides good so the bar does not rotate while running your main passes, it's a fillet type weld if you look at the profile of the bar, not sure if the last pass is a hard facing, over like a 7018 or whatever, probably best to read up on it, or get the Mfr.'s reccommended installation instructions/specifications. Do a search on the web, for "Grouser Bar" I'll post a link of the first site that came up when I did a search, in there at the bottom of the page .pdf format ( need Adobe Acrobat Reader to open the file & read) is a grouser bar profile chart, showing sizes offered, you don't want to go taller on these than what was original height. A-36 is mild steel if I'm not mistaken, not hardened, much more malleable, I'd like to think using that material would be a huge waste of time, but have seen people use reinforcing rod, Re-bar for reinforcing concrete as well. It all depends on your usage, soil conditions, running on rock or abrasive material as to what grade to get, but using grouser bar would probably outlast the remaining life in your present undercarriage.
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