We're going to need a wee bit more information than that (although the picture is helpful). Do you know the approximate hp of the tractor? How many cylinders (number of injectors)?
1.170L on the second picture is the displacement of the engine.
Check Tractordata on Iseki Landhope TU series. Or just the TU series as Tractordata refers to. The engine with that displacement is in the 17 to 20 HP range.
On the valve cover, should be a sticker with more info on the kW/HP of the engine.