FAQ: What Is A Pto Shaft On A Tractor?

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.


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.


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 an additional gearbox that separates the vehicle’s drive shaft into two parts: the gearbox-facing shaft that transmits the engine’s power to the split shaft PTO; and the axle-facing shaft that transmits the propelling power to the axle.

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“Sandwich” split shaft

A “sandwich” type split shaft unit is mounted between the engine and transmission and is commonly found on road maintenance vehicles, fire trucks, and off-road vehicles. This unit receives drive directly from the engine shaft and can deliver up to the full engine power to the PTO. These units usually come with their own lubrication system.


NASA Technical Memorandum 101731; Monitoring Techniques for the “X-29A Aircraft’s High Speed Rotating Power Takeoff Shaft”; David F Voracek, Ames Research Center, Dryden Flight Research Facility, Edwards, California, December 1990 nasa.gov


Pripps, Robert N.; Morland, Andrew (photographer) (1993), Farmall Tractors: History of International McCormick-Deering Farmall Tractors, Farm Tractor Color History Series, Osceola, WI, USA: MBI, ISBN 978-0-87938-763-1. Wikimedia Commons has media related to Power take-offs.

What is the use of PTO in tractor?

What is a Power Take Off ( PTO )? A Power Take Off ( PTO ) is a mechanical gearbox that connects to apertures on tractors and is used to transfer energy from the tractor engine to other components, primarily hydraulic pumps, which generate hydraulic flow that is directed to hydraulic motors and cylinders to perform work.

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 the difference between live PTO and independent PTO?

A live PTO uses a two-stage clutch, which allows the operator to change gears or slow down while the PTO is still running. Independent. An independent PTO uses a separate clutch to control the PTO shaft.

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How much PTO is normal?

According to the Bureau of Labor Statistics (BLS), the average number of PTO days for private sector employees who have completed one year of service is ten (10) days, rounded to the nearest whole number (it’s actually 9.7 days). This number does not include sick days or paid holidays.

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.

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 was the first tractor with live PTO?

Subject: Which of the Ford Tractors was the first to have live PTO? The *00 series, which debuted in 1955, was the first, with the *60 models being the live PTO models, made possible by the two-stage clutch.

Is Live PTO good?

When mowing, this is very useful because you can stop, change gears, back up, and so on while the mower is still receiving power, whereas if the PTO is not “live,” the mower will stop receiving power every time the clutch pedal is depressed.

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How many hours PTO per year?

Divide your annual hours by 12 or 24. For example, if you get 15 days off per year, you’ll have 120 hours of PTO at the end of the year; if you’re paid twice a month, divide 120 by 24, which equals five, and you’ll have five hours of PTO at the end of each pay period.

How much PTO can you accrue?

While there is no set number for a permissible cap, the California Department of Labor Standards Enforcement (DLSE) u2013 the agency in charge of enforcing California wage and hour laws u2013 has previously stated that a vacation cap cannot be less than 1.75 times the annual accrual rate.

How many sick days per year is normal?

Employees typically earn paid sick time as they work; according to the Bureau of Labor Statistics, most employees earn between 5 and 9 paid sick days per year.

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