I have a dissmantled weilder 9150 multi gym but dont have any instructions.

Hello there. If you go to iconservice.com and go to the manuals section you can download a manual for free. Pick weider from the drop down box under manufaurer, then put 9150 in the model number feild and the search will pull up your machine. The assembly instructions are located inside.
Good Luck with the assembly! Tim