Hi Richard, is it the plastic or...
bronze variety? Our bronze box has a lock nut that needs to be loosened before the box can be tightened. Two service wrenches work the best, one for the lock nut and one for the box. I have a piece of SS tubing that slides over each wrench handle to give more leverage. Is your one drip a second when the shaft is spinning or at idle? No big deal. I usually tighten the box by hand only, which usually gets me the drip rate I need but does not over tighten. No drip at rest and one drip every five seconds or so is best when the shaft is spinning.Terry