I need to replace the mower deck on a snapper LT1842 Hydrostat lawn tractor. Is there a diagram for the belt layout?

Hi,
There is but I need the numbers off the model tag. It is white and blact or silver and black and will have model and serial numbers on it. Snapper used to allow a more general search, but no longer does though I cannot blame them since the site spent most of the last few months just plain down.
Peace,
Clarke