As some of you know, I just recently purchased the 27/60 XR7 Super Z. I ordered the striping roller, and the dealer installed it. This works awsome, and will adjust to any setting you want, and is extremely heavy duty. My question is, since my dealer installed it , I didn't get any literature with it. I looked it over to see if I could find a grease zerk and could not. Is this a non serviceable roller? Just want to be sure I didn't overlook it.