What is the condition of your drive disc? The belts can be great but if your disc is bad it ain't gonna budge. If it's questionable you'll want to clean it off and maybe even take some sand paper to it to rough it up a bit. Also clean the drive plate off.I have a JD 726 that will not engage the drive when the clutch handle is gripped. Everything in the drive compartment seems to be in place and able to move. No belts are loose or broken.
Looking for any suggestions?
And I may add if I may to check for the rod or cable adjustment connected to your drive handle, they can be tightened to have your friction disk press harder against the drive plate. But as Micah noted check your friction disk condition first, if you see lot of rubber near the friction disk and if the rubber ring is near the metal ring holding it then it's time for replacement.What is the condition of your drive disc? The belts can be great but if your disc is bad it ain't gonna budge. If it's questionable you'll want to clean it off and maybe even take some sand paper to it to rough it up a bit. Also clean the drive plate off.
There appears to be a missing roll pin/bolt in your third picture.Here is the belt area. Both belts are in place. The loose one is the one that engages the blades.
Here is the compartment. Both chains are on the sprockets.
A close up of the friction plate. There does not appear to be any excessive residue on the plate. The rubber is a bit cracked. When I squeeze the handle, it does make good contact with the plate and I can not move it by hand.
A close up of the chains.
A close up of the belts in the compartment.
To my eyes, the belts and chains and friction wheel seems okay. The differential might be the next place to look then?