I took delivery of a new 4720 this last December and have about 35 hours on it so far. Amazing machine so far...overall very happy. However, I was working the tractor in the woods with a rear Landpride 2584 rake and after a while of going back and forth and up and down with the
3ph to clear debris, I noticed a whine coming from the
3ph on lifting. It would start to whine about 2/3rds the way up and I could feel a vibration in the powerbeyond and rear remotes with my hand. It performed well...just made the noise. Also, I could feel a vibration in the steering wheel at about 1500 rpms. I believe the noise and vibration is from the HST and am wondering if this is normal or what? Hard to describe noise...almost sounds like a gravely type whine and the vibration in the steering wheel goes away with higher rpms. I did read another thread about similar stuff and a technical bulletin being issued last year. Any thoughts or info? Thanks.