Hi Folks,
The sight glass in my 2810 started leaking oil @ about 120 hours and I was able to pull it out with my fingers. I called my dealer, ordered a new one and he visited with Branson about the issue. He told me to use black silicone on the new one as per Branson. Before the new part arrived I took apart the old one, cleaned both the housing and parts, siliconed the inside and outside of the old one, and reinstalled. I let it sit for 24 hours to allow for a full cure before exposing to oil. So far, with another 20 hours on the tractor, the old sight glass has not leaked a drop. I will keep the new one on the shelf just in case.
I hope this helps!