While you wait for answers, we may have found some information which could help you.
Click here for Replace Cable Blackchain has come off my hedgetrimmer How do I get it back on?
How can I fix my Black & Decker Hedge Trimmer LHT2220?
how do i reassemble black and decker gt100 hedge trimmer?
Works intermittantly?
Black & Decker hedge trimmer - not working?
Black & Decker U-272 hedge trimmer?