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Removing a broken bolt

3

37chief

Well-known Member
Location
California
I have a couple mowing jobs next week. I was checking my tractor. I found a broken bolt for the top link bracket. It was a 5/8, broke off flush. I was going to drill for a easy out (never easy) My punch didn't even mark the grade 8 bolt. I tried welding a nut on the broken part, let it cool a bit and I got it out. My next option was using the cutting torch and blowing it out, but that gets messy. One good thing about mowing this time of the year, means I will be back in a couple months or less, to mow it again. Love the rain.Stan
 
works good , take an undersized nut and weld in the center of the nut to the broke off bolt, not on the out side
 
Thanks for answering that question I had, having had the flush snapped off bolt problem but never your solution.
 
i've now started using a flat washer first to weld to the bolt and then weld the nut to the washer. I started doing this when we went from stick welding to wire feed!
 
I had a broken bolt on my Ford 4000 where the drawbar bracket is attached to the rear of the differential. When I drilled for an easy-out, my drill went through the bolt and into the casting! Of course oil comes pouring out. I plugged the leak with RTV, but the experience made me leery of the easy-out approach. This was not my first mishap drilling for an easy-out: I had a broken starter bolt on a 5.7 Chevy that I drilled. The drill broke off in the bolt when it exited the end of the bolt. Of course you can't drill out a drill with another drill, but I was able to get it out with a die grinder.
 
I would get a whole box of nuts and keep welding them on until one holds and the broken bolt comes loose. I've used over half a dozen before until the bolt broke loose. Mark.
 
I fixed s neighbors zero turn by grinding out a bolt, complete with a easy out, on the end of the crankshaft.
 
Weld a flat washer to it,then weld a nut around the outside,to the washer. If you get too much weld on the nut to get a wrench on it,use an angle grinder to clean it up. I had one a few months ago in the loader tractor that was broken off. The one wasn't even flush,it was a thread or so down in the hole. I pooled the weld up to the washer,then welded the nut on. The first attempt didn't work,so I tried again and let it sit overnight. I used the air impact wrench the second time and it spun right out. It was a 3/4 inch bolt,not some little thing.
 

I was at the welding supply store(Airgas) and they had a rod on the counter. Naturally I asked about it. It was to weld down the bolt hole and build it up so you could weld on a nut without the welding sticking to the hole. I don’t know any more details.
Elmo
 
Helps to melt some candle wax on the hot bolt after welding...wait a few minutes to let the wax melt into the threads. Has never failed me.
 
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