Drive pump 453?

[Billwalsh119]

Can someone steer me in the right direction please. Bobcat 453 the left drive control just stopped working. Right side still goes forward and reverse fine but nothing from the left! I lifted the cab and did a visual, nothing looks out if order (no leaks or breaks) peddles work fine right drive works fine but left is dead anyone know what I should look for? How to test the pump? Thanks for any help.

 

[Tazza]

Does it still lift and tilt? not sure how the pumps are arranged, its possible the shaft between the pump segments broke?
Linkages all the way to the pumps are still good?