My craftsman ZTS 7000 42" zero turn mower wil not go forward or reverse. It has hydraulic drive. It has been on ramps and stands for nearly a month while I rebuilt the deck and replaced the bearings in the spindles.

SOURCE: craftsman 42 inch deck won't run

Check proper belt routing. These models are a little tricky. Also check tensioner spring.

SOURCE: How do I remove the spindle from the deck of a Craftsman mower.

Put your blade back on so you will have some backup on the nut. Wedge a piece of 2x4 between the blade and deck to hold the shaft while you take off the nut. You should do that before unbolting the spindle. If you are just replacing bearings, you don't have to unbolt the spindle at all. Just remove the pulley on top and the shaft with blade attached will slide out the bottom. The botton bearing, however, will be on the shaft and is difficult to get off. I use a bearing splitter to get it down far enough to drive off the shaft.

SOURCE: I have a craftsman zts 7500 zero turning radius 26

i going to assume that yr tractor does have the hydrolic p.t.o. that controls the drive and cutting mechanism's???... if so you might start with checking the hydrolic fluid in the resevior. or you might check into replacing the hydrolic p.t.o. pump , if you ran the tractor in heavy work without any hydrolic fluid in the p.t.o. pump the pump is probably burnt up. if so im sure you can beat the cost of a new pump by rebuilding it yrself with a kit.

SOURCE: NO FORWARD NO REVERSE

I had the same problem so I looked under the mower and the belt that goes from the engine to the back of the mower was off so I pushed the clutch as far forward as I could and the belt went on it and it worked