Welder Dave
Senior Member
A track loader bucket is considerably stronger than a wheel loader bucket of similar or even larger size, especially for something like a 977. Arrow West has a couple 977 buckets listed. I think using line up pins and accurate cutting of ears would be a lot faster and easier than line boring. New buckets would have a jig for alignment. A jig could also be carefully made so line boring wouldn't be required. I can't see Cat or Weldco Beales, etc. line boring every single bucket they build. If you were cutting apart a bucket I think would be similar to how they remove bodies from cars for repairing or customizing. They make sure to tack enough braces on to hold everything in alignment. If a bucket "sprung" when cutting it apart, you'd have to fix that first before you worried about the pins lining up. Having pins lined up but a twisted bucket wouldn't be of much use. I've welded new ears on backhoe buckets using the bucket pins for alignment and they didn't require line boring. One bucket was a big rush job and was sent to a fab shop to finish the welding with flux-core. The ears pulled in slightly but they put a porta-power cylinder between the ears and then finished welding the outside to put the ears/pins in alignment. When I originally welded the top swing post back on my hoe, I had a piece of 2 1/2" DOM tubing turned down .005" to line up the top and bottom pivots. Everything went back together fine and no line boring was required. Careful welding and bracing made the difference. The bottom 1 1/2" thick ear was bent. I had to cut a V in it to straighten it but couldn't brace it in position. I had had it bent down about 30 deg's. to allow for the weld to shrink on cooling and pull it up. Once it got straight I tacked braces on so it wouldn't pull too much. If I had braced it straight and welded it would have way too much internal stress from the welding. It takes a lot of thought and knowing proper techniques but there can be ways to avoid having to line bore.