Thanks to all who replied to my question.
I live in New Caledonia (south pacific) a french speaking country.
And my french is not good enough to read technical publications.
Hence the request.
From what I have read it would seem that I have bought a good tractor.
Mine has not had the attention it deserves and requires some TLC.
Maintenance is the key, I think, to a long and happy relationship with your equipment.
Thanks again, it's probably not the last time you will see me here. Grantr