At work we have a 580-D mower I've notice a few problems over the past season of the to me seems that a strip of grass is left uncut between the right wing and main deck, it only really happens when the wing sits up or down a slight slope while the machine and front deck sit flat. The other side is fine. Any help about this? Second one. A fellow employee found a sewer cap that stuck up a few inches with the with one side of the front deck (looks like it folds up) and folded it under. I tried to straighten it out with a chain and the truck and got it sort of back inline. It don't line up perfectly like the owner would like but trying to contiune to pull with the truck and chain just ends up draging the mower around the parking lot. Can you use heat on the deck or is that a no no?