Well, I have been up and down these posts, and other posts on other sites as well, lots of people complain about this problem
Yes, the boom on my B260 Backhoe is also fast and jerky, however mine is brand new, so there are no worn out parts, it came like this new. the Dipper and Bucket operate smoothly but the boom is very fast and jerky, it sometimes will shake the whole machine, and yes I asked my dealer about it and all they told me is, "well you just need to learn how to operate it" Well he may be right, but if everyone has this problem, then it could be a design flaw in the part of John Deere.
So as I was looking over the unit I noticed that the Boom Cylinder is significantly narrower than the dipper cylinder, now I may not have a engineering degree but simple physics tells me that a smaller cylinder will fill with fluid much faster than a bigger one. Which would tell me why the boom is so fast and jerky.
Well I thought about just replacing the boom cylinder with another dipper one, so I looked online for a dipper cylinder (LVA14990) just to see how much, well its $1013, compared to $725 for the boom cylinder(LVA14991).
So what do ya'll think? Could I be on the right track??