It takes some serious mechanical smarts to service today’s combines.Look under the shields on the new John Deere machines,looks like a job for an aircraft mechanic.Add a GPS system,motion sensors on all drive shafts and a computer to monitor everything-it’s quite a complex machine.
It is indeed a complex machine, and enormously nice to operate. I'm a software developer person, and I also operate these machines. A lot of farmers do not even try to fix 'em, because they can't.
One would not want to have any Joe Blow operate these machines without previous experience or serious training.