You are right, trying to get lube into that evaporator motor will be tough and I suspect that's the source of the noise. Spraying lube into that
The fan motor is replacable through the removable cover in the back of the freezer section. But, it's a little tight.
If the fan is not operating properly, that can effect the ice production. We'll know that when the motor gets changed out. Another thing to try is to warm up the control setting. This one senses in the icemold and turning the control colder can offer less ice (as odd as that sounds). Try setting the operating control to the mid point or a little warmer.
You can visit
U-Line Service - Welcome to U-LINE Service or call 1-800-779-2547 for help directly from U-Line. You will be able to locate a servicer or locations to order parts.
Dean Byczynski
General Manager, Customer Services
U-Line Corporation