I've been asked to repair the main hinge on an old dump truck where the holes are nearly worn through.
Here are some pictures:The round bar that the bed hinges on is 1-1/2 inch diameter.
The four "ears" are 3 inches tall, 4 inches long, and 7/16 inch thick.
I have some 1/2 inch plate that I can cut some new "ears" out of. It doesn't really look like the extra 1/16th inch is going to hurt.
Either the original setup did not have any bushings/bearings, or they are long gone!
Here's my plan:
- Cut the ears out of my plate with 45 degree bevels along the weld sides.
- Take them to a machine shop to have the 1-1/2 inch diameter holes milled.
- Have machine shop include brass bushings or not?
- With new ears in hand, cut out old ears using my torch. Grind smooth.
- Grab my welding machine and glue the new ones in place with 1/8th inch
I'll need to make more passes than the original single pass weld when it was manufactured, but it should be plenty strong.
I want to make sure I have considered all options before I cut these ears off.