Jose,
I know very little about your country, maybe just a few basic facts about your location, history, government etc. I do know that there are 17 million people there and that you have survived a horrific cival war, terrible floods and devistation, including some 1 million mines that are still un-exploded.
I understand that your country is now part of the British Comonwealth and wonder if this could be advantageous for someone like you and your position. I would make contacts (friends) with local libraries, parts stores and any agricultural agencies that may contribute information and support.
I am going to make a few guesses here: Your primary language is Portueguese, and probably speak a few others.
You may be 1 in 10,000 that own a tractor, and maybe 1 in 5,000 that have a computer or access to the internet. And since you have a fair grasp of the English language, you just might be able to become a source for your country as "A Tractor Wizard"
Have you tried to find other tractor owners in your country? Is there any way to barter, trade or buy a manual for your 3110B? I think that TBN is THE source for honest, experienced people that want to help you, but I think that there may be much that is lost in translation. If you could get one picture of each problem the replies would come fast and accurate.
I want to help whenever I can, but honestly know very little about your Yanmar model. Good luck, Mark