Hi,
We sell this style of system over here for all the vineyards, you need a heavy duty cutter bar to do dormant cane's, a cutter like the one you have shown is only good for green trimming,
have a look at the ones on this page
Hedging Systems | Whitco Vineyard Equipment
these are the guys that make the ones we sell, the medium duty ones are good for green trimming, but the heavy duty ones are what is used for Dormant wood, along with trimming trees, bush's and anything else that gets in the way.
What you will find with the lighter duty units is, because of the amount of power required to make the cut you will generally produce a fair amount of heat, also the sap from the vines is a great anti-lubricant! so you need to make sure you keep greasing the cutter bar on a regular basis, (every 2hr of cutting!)
The hydraulic flow rate going into the motor is also very critical, you need to have a Flow / Pressure regulator in the line, to much flow and you will burn the cam out in no time, to much pressure and the motor will be cactus. They are operating a a particularly high force, so you need to get this right.
When ever we setup a new system we always stick a Hydraulic Flow & Pressure meters on the line to & from the motors, only way to know for sure the system is setup correct.
Done alot of these systems , single bars, Inverted L, Double row, probably most complicated was a 6 bar system, 2 Tops, 2 Sides, 2 Skirt's! all with hydraulic in-out, Up-Down, Tilt control! So any questions feel free to ask.
