A New Home Model 1585 was stuck in reverse. Can we fix it?
First step is to remove the front cover.
Pull off the knobs, remembering their position (there are some index holes if you forget)
The lump of metal indicated was the problem. It was not retracting when the reversing lever was released. Some cleaning and light oiling helped but the final solution was to slightly loosen the screw marked in red.
Reassemble and all was well