Reply to bob:
It, should come out okay. Just need to get the bolts up 1/2" to get valve loose and slide it out with them in it. Take it apart slowly so you keep track of where everything went. A piece of plywood with 2x4's around the outside would be a good work bench to keep from loseing parts. You will not be able to get the tubes going down inside out to reseal with tank on I don't think. Clean all around valve before you start to keep dirt out.
Later Bob
Don't think you can get into much trouble...there isn't much in there.😊
Service manual does recommend removing the fuel tank, operator's seat and steering clutch control rods.
Shaft removal is a little dodgy.
1. loosen the bolt clamping the lever to the shaft.
2. remove pin from shaft.
3. drive shaft to the left to force the plug out of the housing.
4. drive the shaft back to the right until the lever can be removed.
5. remove the key that held the lever to the shaft
6. drive the shaft out through the left side of the housing
Repeat for second shaft.
It's probably the shaft seal that is leaking and more than likely it is grooved and pitted requiring "speedy sleeve" repair