My father recently purchased a Hustler 4400 with a 72' Heavy Duty Dual trim mower deck at the beginning of the summer. My husband and him were both trying to fix a loose center blade and took the deck apart. They said they remembered how the belts were placed inside. When they had it all back together they started it up and noticed that all the blades were turning in the wrong direction ! after spending almost 3 hours they both gave up. they tried looking on the hustler home page but couldnt find any type of manual. The next day they both went to the store where my father got all of his parts from and they employee said they was a page on the hustler site that had links to the operating and service manual. well i looked and so did my husband and all of our searching led us here. if anyone can help please leave me a link or a belt diagram. the mower deck model# is either 921563 or 924720 if anyone can help it would be greatly appreciated. Thank You for your time.