Hi James
Thanks for contacting the Answer Army to post your questions.
There really is no trick to installing the vacuum attachment. Be sure to follow the instructions outlined on page 14 of your owner's manual also being sure that everything is lined up properly and the vacuum tube should go on with relative ease. Given it may be slightly more difficult to remove being that it essentially ratchets into place.
Thanks again from the Husqvarna Technical Services Team
Hi James
Thanks for contacting the Answer Army to post your questions.
There really is no trick to installing the vacuum attachment. Be sure to follow the instructions outlined on page 14 of your owner's manual also being sure that everything is lined up properly and the vacuum tube should go on with relative ease. Given it may be slightly more difficult to remove being that it essentially ratchets into place.
Thanks again from the Husqvarna Technical Services Team