We’ve just purchased a freeze dryer from Harvest Right, and we’re excited to start freeze drying food.
Most people don’t realize that the freeze drying units are more like power tools than a kitchen appliance, mainly because the vacuum pump requires frequent oil maintenance.
Harvest Right recommends that before each new batch you drain a tablespoon of oil, and add a new tablespoon. Then after 3 weeks of constant use you completely change the oil.
The prices for oil range from $10 – $30 a gallon on Amazon, but don’t skimp and get the cheap stuff. If you want great performance you’ll need to use high quality oil.