Using the long t-handled allen wrench, loosen the 2 screws inside of the spring cover near the top (Don't completely remove them.) Then, slide out the cover from the screws to remove the cover off the spring in the back. Then, using the supplied socket wrench, remove the bolt from the bottom of the spring. Make sure the lid is closed and fully latched first! Remove the spring. On the hinge assembly, pull out the cotter pin out of the bolt. Then remove the bolt (you might have to use a hammer to gently tap the bolt out.) You can then unlatch the lid in the front and lift it off the grill.
Re-installation is just the reverse of this process.
Other Forum Members - Did I leave anything out??