Because these systems are designed to be air tight to keep contaminants out, the reservoir is a very tight fit. Care should be taken to use the collar assembly, with a twisting motion, when removing the reservoir, as using the bottle as a lever may cause damage to it. Also try to apply a light lubricant to the o-ring inside the reservoir assembly to help with the removal of it. Care should be taken to use a lubricant that is compatible with Viton, as this is the material the o-ring is made of, and with the oil being used in the equipment.
Posted in: Opto-Matic Closed System Oiler