My cub cadet zero turn mower wont turn right or left. It will go straight or reverse but wont turn. I just changed the drive belt, but that's all I've done to it.

SOURCE: CUB CADET ZERO TURN Z-FORCE 3-BLADE CONFIGURATION

Under each blade is one single nut holding each blade on. It is not left-hand thread and there is nothing special about it.
Standard thread - Standard hardware - Standard tools. (If memory serves, you need a 15/16" socket to remove these.)
There is no need to index or time the blades. They cannot hit together unless something is bent or damaged on your mower deck.

Hope this helps,
Dolf-

SOURCE: Z force 48 in. cub Cadet mower starts but dies

Check the wires to the seat switch. Under the seat you should find 2 wires connected to the seat. Unplug them, and use a jumper on the end that goes into the body of the mower. Try it again, and if it works, replace your seat.

SOURCE: I have a cub cadet lt 1050 mower and I need to

I just replaced mine today and let me tell you it was a pain in the ****, Had to remove the deck, steering attachment on the underside,and the electric PTO. Took about two hours.

SOURCE: install belt on cub cadet mower

First, make sure you have the model number and serial number (located under the seat) and then go to www.cubcadet.com to get a belt diagram so you know which way the belt snakes through the pulleys.

You will have to remove the two pulley covers on either side of the deck.

Fit the belt around the right side of the deck pulleys when you are on the left. There is an arm attached to the springed pulley on the left side. It will have a hole the size of a 3/8" driver/ratchet. Set the ratchet on unscrew (to the left) and push the arm in toward the center of the mower. You will see the pulley moving too, creating enough slack to slip the belt over the edge of the rim of the pulley with a little elbow grease. If it is too tight, get someone to push in with the ratchet while you slip it on. Once again, you are the grass cutter king!

SOURCE: cub cadet rzt 50, hit stump, blades wont engage but not bent

The blades on this cub cadet are activated with air pressure. Chances are that when you hit that stump, you either blew a fuse or the control module that allows the blades to spin. Begin by checking the fuses. J.