Grass deflector problem

My Husqvarna zero-turn mower gives me fits each time I go to put on or remove the grass-catcher mechanism.

The grass-catcher chutes and bags are NOT the problem, but each time I take off the grass deflector when I use the bagger, I cannot get it back on when I want to mow without the bagger. The attachment to the deck is a spring-loaded bar and pin arrangement, but I have not been able to get the spring installed properly in order to keep some resistance on the deflector. I have spent hours straining with this thing, with no success! There are no instructions on how to do this from the maker.



Any suggestions???