It may be as simple as tightening just a little to stop the leak. Some of the fittings have O rings in them, look to see if you see rubber smashing out around at the fitting, if so, replace the O rings and don't tighten them down too tight.
The vibration of a working tractor can loosen the fittings and this will happen at intervals as you use the tractor. Most of the time it's just a matter of a few turns. You don't want to tighten any of them more than you need to stop the leaks.
If it looks as though the O rings are smashing out too far, then get your dealer to fix it under warranty as they were tightened too tight to begin with.
Make sure, if you're tightening them yourself, to pay attention to the way they are configured. In some cases you need one wrench to hold a nut while you turn another in the opposite direction.
John