skyking1
Senior Member
I am rebuilding the company JD120 excavator, and the shop foreman at the dealer suggested some heat to try and shrink the big pin boss on the main frame. I will check it when i have the boom off and new pin in hand. It may only be a few extra thousands oversized, and he said they had some success with that.
Unfortunately he did not elaborate.
I have been thinking of strategies for it. One that came to mind is some moderate rosebud torch heating for a good long while, then a couple of strategic weld beads on the boss. Let the welds pull it in a bit with any luck and planning.
I won't expect miracles but I also don't just toss money at things either. If it is not too bad I can live with a little play, as long as the pin and bushings and most importantly, the boom bores are good. I will get line boring as needed.
Unfortunately he did not elaborate.
I have been thinking of strategies for it. One that came to mind is some moderate rosebud torch heating for a good long while, then a couple of strategic weld beads on the boss. Let the welds pull it in a bit with any luck and planning.
I won't expect miracles but I also don't just toss money at things either. If it is not too bad I can live with a little play, as long as the pin and bushings and most importantly, the boom bores are good. I will get line boring as needed.