Have a 1370 Case tractor, that has plowed 30 acres without problems, now it runs but doesn't move

Not sure about your Case tractor but a friend has a fairly old Case tractor that is fitted with hub reduction gearboxes. These are used to reduce the amount of torque the driveline needs to transmit meaning lighter and cheaper gearboxes, differentials and driveshafts, though it does mean inside each hub is a fairly complex epicyclic gear train that can and does sometimes cause problems.

I suggest you do some research and then pull it apart and take a look inside. If the problem is not in the hub it is likely to be something like the differential side bearing, etc.

The filters are located behind the engine under the clutch housing. It is an hour glass shape cover about 1 1/2 inch thick with six 3/8 bolts .Be careful it is heavy , will loose about 2 gallons oil.

It is as hard as it looks. one plate on each side of tank, slips out the back. If you can get unstuck from the dirt.

yes there is. The feathering valve spring is broke.

Plug is under drawbar under rear frame

Sounds like you have a hydraulic cylinder bypass problem on the disc

Govenor is bad!

Shifter linkage.

have you checked all of the linkage and lines? filters? get pressure test on hydraulic system to see if pump is weak

* If your yard is up to an acre in size, the ideal cutting width is 30-42" (76-106cm). To avoid being underpowered, or putting too much strain on the engine, make sure your mower or tractor offers a minimum 14 horsepower. Riding mowers are the most commonly purchased for lawns this size. * For a yard that is between one and three acres, you’ll reduce your mowing time with a cutting width of 42-46" (106-116cm) and a strong engine up to 16 HP. Typically people purchase lawn tractors for yards of this size. * If you’re mowing more than three acres, you’ll need to look at the garden tractors, with cutting widths up to 54" (137cm) and at least an 18 HP engine, preferably bigger.