CAN-bus shield

I searched the forum and as far as I can tell all posts related to the CAN-bus shield are on projects with an ODBII reader for cars.

I would like to use the CAN-bus shield in an agriculture project. JD, Claas etc. all use the CAN-bus for internal data communications, basically the same as car manufacturers. I have worked with a USB-CAnbus converter and found that Class for example is using 250 k on the nwer and 50k on the older models. All I need to do with the arduino would be able to set the speed, then monitor the CAN bus and then communicate values for the data I am interested in over the USB port to the PC.

I would think this should be pretty straight forward, but I am wondering if anybody has used the CAN-bus shield outside car CAN-bus and at different speeds.

Thanks,

Johannes