How can I tighten the High Cable if it has slack?
To remove slack from the High Cable, tighten the 1/4" Nylon Locknut that connects its end to the Small "U"Bracket. Similarly, move the 3 1/2" Pulleys to alternate holes in Long "U"Brackets to prevent cable slack.
From the official Weider Pro 9645 manual, page 27
Have a follow-up question?
Answers from the official manual.
Common questions