PTO Gearboxes
PTO or Speed up gear boxes are primarily applied to agricultural tractors where more hydraulic power is necessary than the system on the tractor can provide.
The quick release coupling upon the gear box attaches to the tractor PTO shaft and steps up the PTO speed to 1 much more suited to the efficient speed of a hydraulic pump. A Gear pump is fitted to the other aspect of the gear box.
The Power Take-Off, most commonly referred to by its acronym, PTO, is a common form of mechanical power delivery in the mobile pto gearbox machine marketplace. The PTO can be a way of transferring high power and torque from the engine (usually via the tranny) of trucks and tractors. In mixture with gearboxes and pump mounts, almost any type of mechanical power transmission is possible.
There are three common power take-away methods in the mobile machine market; tractor style, truck transmission design and engine crankshaft-powered, although the latter is not commonly known as a PTO. The crankshaft-driven approach to power transmission is often utilized for hydraulic pumps installed to the front of an on-highway pickup truck, like a plow/spreader or cement mixer. A small shaft with U-joints attaches to a yoke coupler to carefully turn the pump. This configuration of drive isn’t generally referred to as a PTO, however.
The tractor PTO dates back pretty much so far as tractors. Most early PTOs were powered from the transmission, which being proudly located behind the tractor, allows for easy area of an output shaft. The transmission kind of PTO is only engaged when the transmission clutch can be engaged, and is coupled right to transmission, so that when the clutch 
is usually depressed, the PTO isn’t driven.
If the transmission is driving the wheels, then the transmission PTO is turning. This also means the implement can backward-power the transmission aswell when the clutch is certainly depressed, such as for example down a hill or if the attachment has a mechanism with high rotational inertia, resulting in surging of the drive tires. This was avoided by the addition of a dedicated overrunning clutch for the PTO, which prevents torque from becoming applied in the contrary direction.
A live PTO often runs on the transmission clutch with two stages. The 1st stage of the clutch operates the driven part of the transmission, and the next stage of the clutch handles the engagement of the PTO. This method allows independent control of the transmitting, to ensure that the PTO maintains procedure regardless of transmitting clutch activity, which includes stopping of the tractor itself. For a tractor with a mower attachment, for instance, this is the very least requirement; you can’t have the mower switch off when you feather the clutch up a hill and around a tree.