I have a KitchenAid pro mixer that is making a slow clicking noise. It gets faster as I turn up the speed. I first noticed it after replacing a stripped worm follower gear. It sounds like it's coming from the motor. I have checked/cleaned/and re-greased all the other gears several times, and I am confident they are all working properly. Everything looks fine. As far as I can tell. It is not a huge clicking noise, but almost sounds like the fan is hitting something as it goes around. Is this something I should worry about? If I should worry about it, how do I fix it?
Does it only do it under higher load? Mine clicks a little bit when kneading dough, and I determined that it was actually the bowl moving a bit. I have a lift-bowl model, but it could be either that or the hinge on a tilt model.
If it is under load, try pushing on the bowl to eliminate movement. If it happens even when empty, this isn't it.
After I changed the nylon gear, I missed a small piece of the striped nylon gear that was hiding in all the grease. After running it for a few seconds it started clicking. I tore it down and spun the gear with a punch until i found a spot that would catch, and found 2 VERY small pieces of the stripped nylon gear in the teeth of large planetary? gear. After removal it's running like new. If it happens again i will change the grease, and find the piece in the gear. Very small, hard to see pieces in the back of the gear teeth.