I was using my Branson 3820 tonight to plow snow. The tractor has 47 hours on it and I haven't changed the fluids yet (other than the front transaxle), thus it has all the original equipment on it. As soon as I heard the noise I remembered this post, I moved the FEL slightly and the noise went away until the FEL stopped moving. The rpm didn't really seem to matter. It is a little colder out today (20 F) so I'm kind of thinking the fluid might now want to flow very well. The noise was present even after about 30 minutes. Today was the first day I've noticed the noise, but with the wind whipping the last few days and having to cover up so much, it might have been there without me noticing.
I was talking to a friend at work today, mentioning that I was impatient with how long the FEL took to move in the winter. He said his JD had the same problem and finally totally stopped moving altogether. He cleaned his hydraulic screen which was filled with particles and it made all the difference. I'm not saying that the two issues are tied together, but maybe the cold weather/thick fluid, blocked screen might be somewhat of an issue with the noise(?).
When I was trying to clean the driveway and having to wait for the FEL to dump, I noticed I cannot lift my 3Pt when I'm moving my FEL, is this the case with all Bransons? I cannot remember if this was an issue in the summer or not.