Looking at a 1999 Deere 120 excavator with 12,000 hours on it. Haven't seen it in person but seller sent a video of the main issue it has. The hoe won't swing left or right unless you push the right travel lever forward with your foot just a little. Once you push the travel lever a touch the hoe swings just fine. You don't have to push the travel lever enough to move the machine to make it swing. Any ideas? I'd be buying it sight unseen just going off pics and video.