I read a lot of post on greasing and oiling the bearings and chains and it seems everyone has there own time table on the subject.Like anything else the more you use it the more maintenance it will take and if you use it in water even more on the up keep. I bought the Argo Vanguard 6x6 3 weeks ago. I didn't get a chance to check it out before I bought it because of the distance so a friend of mine who's a good mechanic lived close and he checked it out. He told me the Vangaurd 16hp motor was in good shape the tracks were in okay shape not new but still useable and I would get a few years out of then he told me the chains all looked good and the inner bearings seemed in good shape but he could not check out the outer bearings because the tracks were on the machine. The guy selling told him and me all the bearing in the Argo were replaced less then 3 months ago and taken care of since. Last week I removed the tracks so I could grease the bearings behind the wheels. It was not easy to get the tracks off I had to cut the coolers because all the set screws were stripped and I tried ever one. That's when I started to think if all the bearings were replaced 3 months ago I should've found a spot in the tracks to come apart easy but I didn't it seemed these tracks haven't been off in years so how were the bearings changed and maintained? After I removed the tracks I started to check the wheel bearings first one I checked was shot then the 2nd one to. The 2 middle bearings seemed fine the the 2 rear one will on both there was no bearing left totally gone and both flanges were shot to the one shaft was not bad but the other has to be replaced. There was no grease near any of the outer bearings so I don't know if this guy didn't know to grease them or what but it seems like common since that if you have bearings on your machine you need to grease them. So now I'm a little pissed off I probably would have still bought it if he told me the truth I would have payed less because of the money I know have to put into it. I don't mind doing the work I kinda like it but again it's the being lied to that gets me. I called the guy a couple of times and text him to but he never got back to me but when I was buying it he would always get right back to me. There's really nothing I can make him do about it I got taken and it happens. I ordered all the parts I need and someone here told me Argo parts are not cheap and there right.