The John Deere 48 mower deck belt pattern diagram can be obtained from most John Deere dealerships. Many times when you purchase the belt the parts store will give you a belt pattern diagram.
The drive belt for a 48" Power King Economy mower is 3/8" x 88" in a Gates Green Belt or equivalent high strength belt.
To install the belt for John Deere, first get his permission. Once one has hi permission, select a belt for him. Once the belt is selected, proceed and wear the belt for him.
How is the belt position on the front 48" deck on a JD F525
here is a diagram that might be helpful: https://jdparts.deere.com/partsmkt/document/english/featbene/L120_L130_48_3N1deck.pdf
I will put a link to the Deere deck page below. Just scroll down to the L Series 48"
The 325 could have had one of the following decks. 38", 44" Mulch, 48", 48" Convertable or a 54" deck. The most common however were the 48", 48"C and the 54".
48
As your sitting on your mower look down on your left side on the deck is a metal arm locked under a hook get off the mower push down on the arm and pull out toward the rear tire this loosens the rear pulley now put belt over the top front pulley and over the rear pulley move metal arm back to hook and lock in place then your done.
54 cards in a deck. 52 playing cards plus 2 jokers
BELT REPLACEMENT ON HUSTLER FASTrack
With Aces high, there are 48.