Steve goes to see devan because he cannot harvest the wheat in his field. the engine for his harvesting equipment is not functioning. after getting the equipment back from devan, steve is able to begin to harvest.

Steve is an agricultural equipment operator while Devan is a Service Technician

Explanation:

Agricultural Equipment Operators are responsible for operating specialized agricultural equipment and related machinery. Steve is a farmer and can also be termed a machine operator since he knows how to utilize an harvester on his farm.

Service technician are individuals skilled in the diagnosing mechanical  problems and making repairs. Devan was able to identify the problem with the Harvester and also make the necessary repairs.