Hi folks,

I just assembled a vacuum chuck system with a "YaeTek 1/3HP 5cfm vacuum pump - 110V single stage 5cfm rotary vane vacuum pump refrigerant air conditioning" from Amazon. I filled the oil to the max fill line and turned it on to check the pressure; everything was good. I start using it, after 5 minutes of using it the vent on the top starts producing quite a bit of smoke to the point I had to open some windows to air out my shop before it becomes a cloud. I also noticed that not only is smoke coming out of the vent but its also spitting oil out of the same vent hole.

My question is; is that all normal? The smoke and oil spitting?

Thanks in advance for the advice,

Darren