There should be a book with the machine that shows the locations where oils need to be filled, It is a good idea to make some brass tags stamped with number/letter stamps showing what oil goes where, exp. if you have lots of noobs :-)
Check the oils every day before you power on the machine. Many machines have their own hydraulic system and yours may have a problem, check the oils first tho. Some machines sense oil level and generate an alarm, others do not.