The oil resevoir in the back of the machine how long should it take to go down running aprox 8 hour days?
Cincinati arrow 1000
When we used to set these up, people always complained that they weren't working because the reservoir never seemed to go down. We started marking the tank to show the level at install, and if I remember correctly, it would drop about 1/4" every year when set up properly.
To verify that it is working, you should be able to see small oil bubbles in the air lines. It may be necessary to use a flashlight to get good lighting from the side so the bubbles are visible.