SkidRoe
Well-known member
- Joined
- Dec 10, 2009
- Messages
- 1,885
Here is what I fixed today, for anybody who is interested:
The rod end pin has had some slop in it ever since picked up the machine from my dad. I have been greasing it regularily to try and keep it going, but I knew that I was going to have to do something someday.
The last time I tried to greas it, it wouldn't take any and I has noticed that the pin had started turning in the bobtach rather than the rod eye. I was figuring on having to repair the bobtach as well.
Well, the welding job that I was supposed to do for a guy today was cancelled, and I already had child care for the kids, so I had a look around and figured that this would be a good job to tackle. I popped the pin out and it seemed to be the main culprit for the wear.
Checked the holes in the bobtach with a bore gauge. Other than being worn about 40 thou oversize, they were only about 10 thou out of round. The eye on the cylinder was worn a bit worse, it was close to 90 thou in it's worst spot. Also, much to my disappointment, there is no bushing in the eye on my machine. So, I went at it with the die grinder and was able to get most of the spots to clean up at about 45 thou over.
I went and picked up a piece of 1-1/4" 4140HT (pre-hardened) to make a new 1.045" pin. I gun drilled it for a grease fitting and cross drilled it completely, so that there are now 2 points for the grease to lube the pin. Last of all, I made a new tab to weld to the pin to keep it from rotating and hold it in. The 4140 machines nice with carbide tooling, but I had to re-sharpen my 1/8" drill a few times to get it drilled.
Not an ideal fix, but way better than it was. I will have to pull the cylinder at some point and bore the rod eye for a bushing.
After fixing this joint, I noticed that there is a bit of wear in my lower pins as well. Have to order up some parts to do them.
The rod end pin has had some slop in it ever since picked up the machine from my dad. I have been greasing it regularily to try and keep it going, but I knew that I was going to have to do something someday.
The last time I tried to greas it, it wouldn't take any and I has noticed that the pin had started turning in the bobtach rather than the rod eye. I was figuring on having to repair the bobtach as well.
Well, the welding job that I was supposed to do for a guy today was cancelled, and I already had child care for the kids, so I had a look around and figured that this would be a good job to tackle. I popped the pin out and it seemed to be the main culprit for the wear.
Checked the holes in the bobtach with a bore gauge. Other than being worn about 40 thou oversize, they were only about 10 thou out of round. The eye on the cylinder was worn a bit worse, it was close to 90 thou in it's worst spot. Also, much to my disappointment, there is no bushing in the eye on my machine. So, I went at it with the die grinder and was able to get most of the spots to clean up at about 45 thou over.
I went and picked up a piece of 1-1/4" 4140HT (pre-hardened) to make a new 1.045" pin. I gun drilled it for a grease fitting and cross drilled it completely, so that there are now 2 points for the grease to lube the pin. Last of all, I made a new tab to weld to the pin to keep it from rotating and hold it in. The 4140 machines nice with carbide tooling, but I had to re-sharpen my 1/8" drill a few times to get it drilled.
Not an ideal fix, but way better than it was. I will have to pull the cylinder at some point and bore the rod eye for a bushing.
After fixing this joint, I noticed that there is a bit of wear in my lower pins as well. Have to order up some parts to do them.