Is this noise normal for a Hobart KA K45SS?
I just bought one for a song intending to resell it, but sitting there on the counter it reminds me so much of my grandmother that I've hesitated on the reselling part. It works on all speeds, and easily handled oatmeal raisin cookie dough, but I've noticed a slight "tunk, tunk, tunk" noise at the lower speeds (1-4 or so). Is this normal, or could it have some sort of gear problem? I've played with the idea of opening it up to regrease it anyway. If so, should I be looking for something amiss? It makes the noise with or without a beater attached, and runs smoothly and quietly at the higher speeds.
Thanks so much for any insights you might have!