The truth is that the farmers don’t own their tractors when JD puts in trash like this.
One technicality in this set-up is that these implements have become so expensive that many farmers literally NEVER actually OWN these things any more. They lease them. The lease contract probably contains stipulations that ALL repairs MUST be done by a qualified technician from the implement company, which the lessee signs. This is not your old “H” or “M” Farmall any more.