I’ve been running an EC 160 Volvo with a rototilt for 10 years. I rip trees right out of the ground with it. I made a shear for mine so I can cut trees up to 16” softwood and 10 “ hardwood. I couldn’t run an excavator without it.
To relief the pressure on the grapple shut down the machine and start it in acc. Use the joystick rollers for tilt, rotation and grapple. Disconnect hoses. Disconnect the grapple. Grapple should be mid-air while relieving pressure.
Even following the recommendation on bleeding off the hyd system before unhooking the tool it can still have pressure, via heat or loss of heat etc. I have a mock female and male quick couple with some pipe between and a T with a cap use this to release any excess pressure on the machine side and tool side, takes an extra minute but it makes hook up easy. You still have to clean the fittings and this is very little extra time. We run and X12 and Rototilt rt3 they both pin up to each others tools as well. I've heard even with the Quick Oil/Attachment system you still need to check the quick connects are clean for longevity of the fittings, this mean the operator is out of the cab. I would never go back to a regular bucket and thumb.
If you put the machine on hammer mode and turn the power off to the rotator you can flip the buttons a couple times and it will bleed the pressure off.
Add a saw cassette and really make time! I run a Holp tilty on my Kaiser S2-4 4x4 with Leica 2D grade control. Wished Leica would have sold me the Euro 3D....Run a tilty and you will never like a straight machine again!
