A professional who tends machine that flattens and dries oilseed, such as soybean, cottonseed, and corn, and presses it to extract oil. Respnsibilities include:

• Turns handwheels to adjust distance between rollers that flatten oilseed.
• Starts rollers and turns gate valve to admit oilseed.
• Observes rolling process to ensure that pressure of rollers on oilseed is not sufficient to extract oil.
• Turns control of heat drier to specified temperature, and opens chute to admit flattened oilseed to drier.
• Turns steam valves of heat cooker to cook dried oilseed.
• Turns handwheels to adjust roller pressure of oil expeller.
• Feels samples of expelled oilseed to determine that sufficient quantity of oil has been removed.
• May tend attrition mill that breaks up dehydrated oilseed.
• May tend filter press to filter oil.
• May be designated according to process phase as Crusher Tender (oils & grease); Drier Tender (oils & grease) II; Oil-Expeller.