We have a new Cat 299xe and using it with a Prinnoth mulcher head. Running in high flow and noticed that while raising or lowering the boom we can hear the head dropping RPM's. It will also begin completely loosing hydraulic flow with the boom raised above the cab sometimes for 10-15 seconds before it kicks back on and starts flowing. We notice it loosing flow pressure while lowering boom but not as bad. As soon as you stop movement of the boom it flows properly. Any ideas? We've contacted service but thought I would see if anyone else has experienced this.
