Chosen Solution

I have this vintage juki babylock ef-205 two thread serger(or overlocker I’m not sure which one it is called), I looked for a broken or stuck part and everything seems fine. But still stuck. Handwheel doesn’t turn, only a few degrees back and forth. Any help would be appreciated.

After spending two hours, I decided to open the machine up, oiled all the joints and moving parts again an it started to loosen up a bit. As it turns out this model has a sponge and some thread under it’s oiling hole on the body to deliver to four different parts (apparently which was not enough) so all I did was to oil those parts that were out of reach, turn the handwheel back and forth til it could turn all the way and then powered the machine for two minutes to make sure everything was right