Questions & Answers about Non sappiamo ripararlo.
Could I move the lo to the front and say Non lo sappiamo riparare?
Yes! Because sapere acts like a modal verb here (just like potere, volere, or dovere), you have two choices for pronoun placement. You can attach it to the end of the infinitive verb (Non sappiamo ripararlo) or put it before the conjugated verb (Non lo sappiamo riparare). Both are completely correct and mean the exact same thing.
Why is it ripararlo instead of ripararelo?