I have posted about this old mill in the past and found this place to be a great source for info. I have Lagun FU3-LC horizontal mill with a vertical head. The head that was on it when I bought it needed more work than it was worth so I swapped it out for a Lagun FTV2 head. I am currently in the process of Installing a 3 axis DRO and I also want to change the oil. I have no book for this machine. I have contacted Lagun they say getting a book for this mill is not a possibility. Honestly the person at Lagun who responds to my emails is not very helpful. I am trying to determine what oil to put in it. It is not heavy gear oil. It does not feel like motor oil or hydraulic oil on my fingers. Unfortunately my allergies are in full swing and I cant smell it. So any one what type of oil this old mill takes. The oil is where the horizontal spindle is but the pump has lines coming off it that sends oil to other parts of the machine. I got pictures soon as I figure out how to post them.