The used vacuum caster I purchased started leaking oil after I turned it on the first time. So before turning it on again a revamp was required. The newer models are now built for servicability and for easy access to the oil input port. My older model required some modifications in order to make adding oil easier.
A trip to the hardware store seemed in order, and these are the parts from the plumbing and irrigation aisles that we thought would work.
Here are the parts installed, and below is a closeup of the modification to the oil input port.
Once the mods were made and oil was added, we ran the pump. If the pressure is low enough, water will turn to ice.
The pressure reached the max for this unit, and the water was very cold. Need a more powerful pump to make ice!