No problem on the grapple hydro pump size they are all the same on a Deere.
The cylinders are not bigger and there is only one cylinder per action instead of two like on a single function grapple so action might be faster instead of slower.
The rear of the cable machine is shorter than the same 540B grapple rearend, but that shouldn't bother it too much, as this is the smaller version of the Esco Swing Boom that I am mounting onto it.
For a few weeks I have been using my CAT 518 Skidder with the larger model Swing Boom, and it can pick up 30" oak trees and move them from side to side and up and down at the further extents with complete ease. So I don't see this scaled down version as being any sort of problem for the smaller 540B skidder size, and I love this skidder it is the tightest best handling skidder I know of, flawless describes it best, as it has super fast steering and I'm putting a bigger engine in it as soon as a hill job presents itself. Right now the 90-100 hp is fine for flat ground work, but I hate it for any kinda hill work.
Now we are just too busy to get away and get the swing boom mounted. I have some more guys coming to help work and that might give me a chance to take the cable machine home or to the machine shop and mount the swing boom and joystick controls. As soon as I get that completed, then joystick controls are going onto the 518, that machine is just amazing at what it can do with that boom. I will never log without a swing boom, I can tell you that for sure. What you can do with them is tops.
Sam