Juki 555 oil bubble
I bought a Juki 555-5 machine.
It has a plastic bubble on the top. I was told this is an oil sight gauge.
Am I supposed to see it splashing up in there like an old fashioned coffee percolator, or not?
I'm not seeing anything, so how would I know it is being lubricated?
It seems to run just fine, but I'm worried it isn't pumping the oil out of the pan.