2018 Kubota RTV-X1140 Steering issue and steering wheel removal

[TKainz]

We're new to RTVs and just recently purchased this Lubota X1140. We're noticing that when driving it, it seems that the steering wheel changes position. For example, if I were to mark the steering wheel at the 12 o'clock position and then start driving it around the ranch, over a short course of driving it, that steering wheel mark would migrate to the 9 o'clock position - while still driving straight. We'd go around a few turns and then get on a straight-away again only to notice the steering wheel mark would now be at the 5 o'clock position.  Is this normal or has something worn?   As far as the steering itself is concerned, the wheel turns very easily (when driving) and there are no 'noises' or grinding or anything of that sort.  The other question I have about the steering has to do with the steering wheel itself - I cannot find anything on the internet about how to pull and replace the steering wheel. The one currently on the vehicle was damaged by the previous owner and we want to replace it with a new OEM wheel. The current steering wheel, with the center star and emblem removed, does not have any threaded screw holes I've seen in the past on other vehicles for using a steering wheel puller.  Thanks