Small Engines (Lawn Mowers, etc.): Craftsman Riding Lawnmower Wont Move, seems like clutch wont disengage, mower deck, hydraulic fluid

Question
I am having a problemn with my rider.  The Model number is 917.258502  It starts, the mower deck engages, it just won't move forward or reverse.  Is there a way to see if the clutch isn't disengaging?  It was working fine and then all of the sudden during shifting it wouldn't move.  The shifting appears to be happening.  Any help would be great.  Thanks, Joaquin

Answer
Joaquin
There is a drive belt Thats is in the rear of the mower.That is what makes the mower move you need to see if the belt is still attached or it may be loose. If the belt is intact and adjusted correctly then you may need some hydraulic fluid in the Hydro gear.

thanks