Originally Posted by jpstevens
occasionally makes a noise like it's attempting to partially engage, although the lever is securely in the dis-engage position. Turning the wheel
generates a ratcheting noise that makes me think that soon something will break. I have not yet disassembled anything, so suggestions would be much appreciated. Thanks
Inside is a cam and a ridged belt. The cam doesn't always disengage fully, in fact under normal operation it barely disengages. Most likely your belt is old and stretched, keeping some level of engagement. Order a new belt online, take the unit apart. Don't forget to clean the inside while you're there. It's easy. You might as well know how it works anyway.
Common problem is the pin through the engagement lever will rust and the lever will flop around. If this happens push/ drill out old pin, fit new one made from a stainless nail or something. This isn't related to your complaint, just a heads-up.