Removal of rear wheel on cox stockman ride on mower

There appears to be a roll pin up under the steering wheel that holds it on the shaft. You will have to tap this out with a small punch or nail before you can remove the wheel.

Old question, but maybe this will help others:
Here is the answer for all Cox Stockman machines fitted with a single large bolt through clutch cone. Below it you'll find a VERY GOOD REASON WHY YOU SHOULD NOT DO IT!!!

1. Disconnect the negative (-) lead from the battery.
2. Loosen the four bolts that secure the engine and slide engine backwards.
3. Remove the 'R Clip' on the link rod at the front of the clutch carrier, then disconnect the link rod.
4. Loosen all four grub screws on the drive plates and slide them as far out as you can.
5. Raise the rear of the machine and secure with axle stands or some other method that will leave you with a SAFE WORKPLACE!
6. Remove the 9/16" locknut on the clutch pivot bolt (under the rear of the machine), then unscrew the pivot bolt. Do not try to drive it out with a punch, as it is screwed into the adjusting plate.
7. When bolt is removed, slide the rear of the carrier across to one side and the front of the carrier to the other side ( to clear the bracket at the front of the carrier) and work the whole assembly forward enough to clear the rear chassis rail. Then drop it down and remove the assembly from the machine.

To replace the cone, lock the large bolt head into a vice, then use a 2 or three pronged lock bar to unscrew the pulley from the bottom of the bolt. Then, fit a new cone onto the bolt and reverse teh entire process.

Now, here's why you should NOT DO THIS AT HOME!!!!!!!!!!!!!!!!!!!!!!!
If you don't read this part, I absolutely guarantee that it will end up costing you far more money than if you'd sent the machine to a Cox Service agent ( I am one).

About the only thing on any Cox machine that requires specialist knowledge and tooling to correctly repair, is the drive cone clutch system. Removing and replacing the drive cone itself is the easiest part of the process and I have seen it done by plenty of people. I've also spent plenty of time then fitting another new cone to their machine, because the one they put on is now stuffed. The drive cone is just one part of an assembly and if the entire job is not done correctly the FIRST TIME, the new cone can be destroyed in a very short time. And the only way to do the entire job correctly is to have the special tools and knowledge. No if's, no but's and no maybe's!

By removing the four lug nuts.

You will have to put it on ramps or find some way to get it off teh ground so you can get under the deck. The blades will have 1 large nut that you need to remove and thats it. Just take the nut off replace the blade and put the nut back on.

it is common for the rear wheels to get stuck to the axle i just change the tires or add a tube while its on the axle you will damage more trying to get them off

they have a nut under a cap in the middle of the rim and some have a cotter pin remove the pin take the nut off be sure tire is off the ground trhe pull on the wheel you may have to use a rubber mallet for help to remove it.

The wheels are not designed for easy removal. You have to pop off the hub cap, remove a retaining ring (which is easier with a special tool), and then pull off the wheel (which may require a special puller tool). So don't do it. Jack up the tractor and you can remove and replace a tire on the rim without taking the wheel off.
Good luck! If this is helpful, please rate my answer, thanks!

Do you have the rim and tire off and you want to remove the hub?
I believe every rider mower and tractor I've had and worked on had the rear tire attached to the hub as in a car, with lug nuts or lug bolts. Check to see if there are four or five lug bolts that hold the rim onto the hub.

in the center of the rim remove plastic cap remove c clip retainer then pull rim and tire off the machine

Try some penetrating oil around where the rim and shaft meet. Spray as far into the space as possible. Let sit for a little while to let the oil work. You may have to persuade it with a hammer.