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
Here's my plan:
1. Cut the ears out of my plate with 45 degree bevels along the weld sides.
2. Take them to a machine shop to have the 1-1/2 inch diameter holes milled.
3. Have machine shop include brass bushings or not?
4. With new ears in hand, cut out old ears using my torch. Grind smooth.
5. 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
14 years ago