How do you remove a 172 pto gearbox on a 850 tractor?

To remove the 172 PTO gearbox on an 850 tractor, start by disconnecting the PTO shaft from the gearbox. Next, remove any bolts securing the gearbox to the tractor, and disconnect any hydraulic lines or electrical connections if applicable. Carefully slide the gearbox off the tractor, ensuring you support it properly to avoid damage. Finally, inspect the mounting surfaces for wear or damage before installing a new gearbox.