Limbsaw requires a hydraulic flow of 7 USGPM.
Your tractor can deliver a theoretical max flow of 8.3 USGPM at full engine rpm.
Your tractor, as an open center style hydraulic system, may reduce or almost stop flow to the Limbsaw any time you move the FEL.
Suggest you talk to the manufacturer to fully understand what you can expect from their product on your tractor as running at almost full speed to satisfy the saw's hydraulic needs while trying to trim will add challenges.
Also talk to manufacturer about possible hydraulic system overheating if saw used for prolonged periods. Your system does not hold a lot of fluid.. 12 quarts
Dave