Heavy Equipment CAN Bus Tap

[kipster1203]

Hey guys, I'm coming to this site in hope to find someone that may be able to help:

I work with large drilling rigs of various brands and all operate on a CAN bus system (not surprisingly)
My job is to install monitoring equipment to these machines, to record:
Hydraulic Pressures
Drilling Rates
Drilling Rotation Speeds
Mast Inclination
Etc...

Even though all of this information exists on the CAN bus network, I currently have to pull all of these signals manually which you can imagine is a lot of wiring!!

The manufacturer will not with us to let us know where each is located on their bus but I have to think there must be a way to connect to it and figure it out on my own.

Would you please some direction?
I currently have an IXXAT USB-CAN V2 converter but could purchase something else if needed.

Thanks a lot for all your help!