Can't help you with a B1600 but you may want to start having a look at http://www.kubotabooks.com/AutoIndex/index.php?dir=/ and
http://www.kubotabooks.com/AutoIndex/index.php?dir=Tractor%20Owners%20Manuals/
the links are from member alchemysa - he's also in SA so may be a further guide
I...