What is it leaking? Water? OIl? Is it the section where the shaft shows a little bit? If so, you can turn those two nuts a 1/2 turn or so to snug up the packing glands.
Grinding is signs of bad things. Could be your impeller and wear ring making contact. Worse it could be your thrust bearing going bad. If your thrust bearing is going bad, it can do damage to your motor.
