I just found this forum, looks like there is a lot of knowledge here, so I was hoping someone could share some of it. I'm looking at an old 875 that won't travel. If you take the drive chains off you can pull it with the bucket but with them on it won't move. Any ideas on what the problem might be? Any info would be appreciated, I have no experience with these old machines. Everything else works. I'm trying to decide if I should pass on it or not, I just want one to use around the farm . Thanks in advance.