how to fix this mess

54suds wrote:
I have repaired the same problem using Loctite epoxy instant mix self mixing applicator and fluted dowels and drilling a new pilot hole in the dowel
is you BF a 1500 series?


you can also try using a much larger diameter lag bolts . try it in one of the middle holes to check for how well it holds

Bedlam wrote:
Start by filling the holes with tooth picks dipped in epoxy. Once set, use the next diameter larger screw. If you have access from the inside, you came add an internal backing plate and use bolts instead.

If it's a wood frame, either version above of this fix will work. Metal frame, next bolt size up. I don't know that I'd install through bolts and nuts with a backing plate. While it would make it much stronger, if something like this happens again, it may rip out the whole back, not just the jack. This one's your choice.
I have had to fill rust and water deteriorated jack bolt holes on my TC jacks with epoxy and dowels and it is working great . Seal up good around the repair when done.