Do you have a diagram of what lines of each port goes to I am converting my 317One thing to look at first is the bottom of the steering column and determine if you have a 4 or 5 port column. The plumbing is different on the two. With the 5 port system the hydraulic system use does not stop the ability to steer while in use. It appears the earlier models Jane the 4 port and later models have the 5 port. I converted my JD317 to JD318 power steering. The 5 port is much better.