Power take-off
A splined drive shaft is most commonly found on a tractor or truck, but semi-permanently mounted power take-offs can also be found on industrial and marine engines, and an accessory drive can be used in conjunction with a constant speed drive in aircraft applications.
History
In 1920, IHC offered the PTO option on their 15-30 tractor, and it was the first PTO-equipped tractor to be submitted for a Nebraska tractor test. The PTO was a competitive advantage for IHC in the 1920s, and most PTOs built today[when?] are live.
Safety
Power take-off entanglements are an example of agricultural events that can result in death or permanent disability; some implements use light free-spinning protective plastic guards to enshroud the PTO shaft, and the Health and Safety Executive provides guidance in the form of a leaflet in the United Kingdom.
Technical standardization
The ISO 500 standard for PTOs calls for operation at 540 revolutions per minute (rpm). A shaft rotating at 540 rpm has six splines and a diameter of 1 3u20448 inches (350mm). The first industry standard for PTO design was adopted by ASAE in 1927. A 10-spline type was used with some early equipment such as the 1948 Land Rover.
Use on commercial vehicles
The PTO is engaged and disengaged using the main transmission clutch and a remote control mechanism, and different models will offer different “PTO shaft rotation to engine RPM” ratios. Most Unimogs come with front and/or rear PTOs and hydraulics, as well as three point hitch systems.
Split shaft
A split shaft PTO is mounted to the truck’s drive shaft, with the gearbox-facing shaft transmitting the engine’s power to the PTO. Because the PTO can only be used while the vehicle is moving, 4×4 drive systems must be available.
“Sandwich” split shaft
A “sandwich” type split shaft unit is installed between the engine and the transmission, and usually comes with its own lubrication system. Because the gearbox is sandwiched between the engine and the transmission, the driveline must be widened to accommodate the installation.
References
According to Graeme Quick, the medal for the first recorded power take-off on mobile machinery should go to an Aveling and Porter Bell-type reaper, which was displayed at the 1878 Universal Exposition in Paris.
How does a PTO work on a tractor?
The tractor’s stub shaft, also known as the PTO, transfers power from the tractor to a PTO-driven machine or implement by connecting a drive shaft from the machinery to the PTO stub shaft. The PTO and drive shaft rotate at 540 rpm (9 times/sec.) or 1,000 rpm (16.6 times/sec.) respectively.
What is the function of PTO?
A power take-off (PTO) is a device that transfers mechanical power from an engine to another piece of equipment, allowing the hosting energy source to transmit power to additional equipment that does not have its own engine or motor, such as a jackhammer powered by a tractor engine.
Do all tractors have PTO?
The information you’ve learned so far about PTO may have led you to believe that it’s only for certain types of tractors, or that it’s for all tractors. It’s natural to wonder if you’ll find PTO on every tractor you come across, and the answer is yes. Almost all modern tractors have PTO.
What is a PTO pump on a tractor?
PTO pumps (also known as trunk pumps) are directly connected to the back of a tractor and are powered by the gas engine’s driveshaft, effectively converting rotational power into hydraulic power through the power take-off.
How many types of PTO are in a tractor?
The Independent PTO comes in two varieties: mechanical and hydraulic.
What direction does a tractor PTO turn?
Agricultural tractors and equipment are the main field of application for this symbol, which indicates that the PTO shaft rotates clockwise.
How many types of PTO are there?
Mechanical and hydraulic PTOs are the two main types of independent PTOs. A mechanical-independent PTO has a separate on-off selector in addition to the PTO control lever.
Why do we write PTO?
Please Turn Over (PTO) is a phrase that is usually written at the bottom of a page to ask the reader to turn the page and to indicate that more information is available on the other side or next page. For example, you could write PTO below the description and draw your diagram on the next page.
Can you reverse the PTO on a tractor?
Unfortunately, PTOs only work in one direction – your experience is one of the reasons hydraulic post hole drills (PHDs) are so popular because they can be reversed to get out of any jam.
Is a tractor A PTO standard?
Because not all tractors have a power take-off that meets the standards, check the tractor’s operating manual before using any PTO to make sure the PTO and implements are properly matched.
What RPM is 1000 PTO?
540 and 1000 PTO at 1950 rpm.
How do PTO hydraulic pumps work?
The hydraulic oil flow is led to the piece of hydraulic equipment through the pressure line and back to the system’s hydraulic oil tank through the return line. The hydraulic oil flow is led to the piece of hydraulic equipment through the pressure line and back to the system’s hydraulic oil tank through the return line.
What is a PTO on a semi truck?
PTOs (power take-offs) are mechanical gearboxes that attach to apertures on truck transmissions and are used to transfer engine power to auxiliary components, most commonly a hydraulic pump.
How do I know if my truck has a PTO?
The PTO shaft is located next to the input shaft that protrudes from the front of the transfer case and has a removable cover. It is only found on the NV241HD transfer case; neither the NV231LD nor the NV241LD have it. Look for markings on the transfer case itself.