Dadnatron
Veteran Member
I purchased an old (probably late 50's early 60's) pull scraper. Parts were discontinued in 1981.
I currently have an issue with the cylinder dump pin/bushing. It wore so badly, that it stripped off the nut and came out. I had it turned true (or almost so) and a larger bronze/alum bushing wear bushing made to fit the system. The issue is, originally, it was screwed directly into a threaded part of the main dump box. Subsequently, over the last X#yrs, someone put a toplock nut on it, but it didn't catch the entire thread, so they welded the nut to the shaft. This is what stripped and broke off.
So, when I replaced the turned part, I saw that the shaft barely penetrated the inner box, and the nut caught about 1/3 of the threads. I closed my eyes, welded the nut to the shaft and the box, hoping that it would hold. And it did... for about 6 pulls.
I didn't feel good about the repair, and I had several reasons why.
First, the hole is oblong. The shaft originally was 1 1/2", but had worn to about 1 1/4" and the hole in which it passed was worn to an egg shaped 1 1/2" x 1 3/4". I knew putting it in, that it wouldn't hold, but I hoped, since it had lasted as long as it had, that it would get me through this project.
So, I had a 'shoulder' turned in the main part to be a true 1 1/2". It should seat into the egg shaped hole... but I now need to change the egg to a circle. I believe I can do this by welding up the long axis to create the size and give added steel to grind flat for the shoulder seat.
Which gets me to my questions...
1st, I have a die grinder, but don't have a bit that I think would work. Will you guys help me choose something to grind the inner 'roundness' to shape the welded part back to a circle? I'm not looking for a daily use bit... I need it for this job... just this job right now, unless the cost difference is reasonable.
2nd, Copper... I know that welding spoons are used to fill holes in that they aren't 'sticky' to weld. I don't really know the extent of this 'non-stickiness' but it did make me think. Could I get a copper pipe with OD of 1 1/2" , put it through the egg, weld up around it, then pull it out? I'm sure it would weld to some degree, but I don't know. Even if it helped retain the major portion of the hole shape and size and allowed me to have to grind less. (This is probably a pipe dream... lol)
I currently have an issue with the cylinder dump pin/bushing. It wore so badly, that it stripped off the nut and came out. I had it turned true (or almost so) and a larger bronze/alum bushing wear bushing made to fit the system. The issue is, originally, it was screwed directly into a threaded part of the main dump box. Subsequently, over the last X#yrs, someone put a toplock nut on it, but it didn't catch the entire thread, so they welded the nut to the shaft. This is what stripped and broke off.
So, when I replaced the turned part, I saw that the shaft barely penetrated the inner box, and the nut caught about 1/3 of the threads. I closed my eyes, welded the nut to the shaft and the box, hoping that it would hold. And it did... for about 6 pulls.
I didn't feel good about the repair, and I had several reasons why.
First, the hole is oblong. The shaft originally was 1 1/2", but had worn to about 1 1/4" and the hole in which it passed was worn to an egg shaped 1 1/2" x 1 3/4". I knew putting it in, that it wouldn't hold, but I hoped, since it had lasted as long as it had, that it would get me through this project.
So, I had a 'shoulder' turned in the main part to be a true 1 1/2". It should seat into the egg shaped hole... but I now need to change the egg to a circle. I believe I can do this by welding up the long axis to create the size and give added steel to grind flat for the shoulder seat.
Which gets me to my questions...
1st, I have a die grinder, but don't have a bit that I think would work. Will you guys help me choose something to grind the inner 'roundness' to shape the welded part back to a circle? I'm not looking for a daily use bit... I need it for this job... just this job right now, unless the cost difference is reasonable.
2nd, Copper... I know that welding spoons are used to fill holes in that they aren't 'sticky' to weld. I don't really know the extent of this 'non-stickiness' but it did make me think. Could I get a copper pipe with OD of 1 1/2" , put it through the egg, weld up around it, then pull it out? I'm sure it would weld to some degree, but I don't know. Even if it helped retain the major portion of the hole shape and size and allowed me to have to grind less. (This is probably a pipe dream... lol)
