I have a Nolting CLX 20 Long-arm. I keep a log to track hours since needle change and last oiling. It was time to oil today. I dutifully dropped one drop of oil onto each of the oil wick ports on the top of the machine head this afternoon. When I turned on the machine for warm-up I heard a distinct squeak. It drove me absolutely nuts. I waited a few minutes to see if oil would reach this squeak. Nope.
This squeak was clearly a cry for lubrication. I cut the power to the machine, turned the hand-wheel and could hear a whisper of a squeak in two spots of the full turn of the wheel. The wick ports were wet with oil. I decided that I had to get to the innards.
Now, the front of the Nolting has 6 hex screws that holds the front plate and light bar in place. Two of them are located beneath the light bar, you can't see them in this photo. The two on the left side of the photo below also hold in the back side plate.