An Four Series PTO (Power Take-Off) shaft is a form of power transmission device made of metal which is used to transfer energy from an engine or any other power source to an equipment like a baler or mower. The term "4 series" signifies the dimensions as well as the specifications for the PTO shaft which are designed to handle a specific amount of torque and power. The PTO shaft of the 4 Series is splined in a standard size and pattern that lets it be easily detached to the tractor or. It usually consists from a rotating shaft that has an splined ending that connects onto the tractor's PTO output shaft, and an attachment yoke or another mechanism at the other end that connects with the implement. This PTO shaft was designed to support up or 80 horsepower based on the particular type and design. It is essential to choose the correct size and kind of PTO shaft to suit the equipment you are using, as an unsuitable or oversized shaft can cause damage to your equipment or even death or serious injury for the user. #4 Series PTO Shaft Parts The 4 Series PTO (Power Take-Off) shaft is typically made up of a number of components, including: 1. PTO Shaft PTO Shaft: The primary rotating shaft that transmits energy from the tractor into the. The shaft is typically composed of steel, and it has a an splined end which is attached onto the tractor's PTO output shaft. 2. Yoke: Yoke: PTO shaft yoke, or any other attachment mechanism is utilized for connecting an PTO shaft and the. The yoke might include a spline or another connector that is matched to the shaft of the implement's input. 3. Safety Shield Safety Shield: A PTO shaft guard or safety shield is used to protect the PTO shaft to protect pets and humans from being in close contact with rotating shaft. This PTO shaft security shields are typically composed of plastic or metal and could be hinged or sliding design to allow an easy accessibility to the PTO shaft. 4. Bearing Bearing PTO shaft bearing utilized to help support the PTO shaft and decrease friction when it turns. The bearing could be situated in the tractor itself or in the machine, based on the particular design. 5. Locking Collar Locking Collar PTO shaft-locking collar or another device is employed to lock PTO shafts PTO shaft with the tractor's PTO output shaft. The locking collar can be spring loaded or require a different tool for engaging and disengaging. 6. Universal Joint Universal Joint PTO universal joint for shafts or U-joint can be used for power transfer between both the PTO shaft, and implement. This PTO shaft U-joint can allow for slight disalignment between two shafts, and assists in reducing wear and vibration. 7. Clutch: Several PTO shafts could have an automatic clutch mechanism that permits operators to engage or disengage from the PTO with no interruption to the tractor's motor. This PTO shaft clutch could be either automatic or manual according to the specific model.