4 Series PTO Shaft – Replacement of Bondioli & Pavesi PTO Shaft

4 Series PTO Shaft - Replacement of Bondioli & Pavesi PTO Shaft

A 4 Series PTO (Power Take-Off) shaft is a type of mechanical power transmission device used to transfer power from a tractor or other power source to an implement, such as a mower or a baler. The "4 Series" refers to the size and specifications of the PTO shaft, which is designed to handle a certain amount of power and torque.

The 4 Series PTO shaft has a standardized spline size and pattern, which allows it to be easily connected and disconnected from the tractor and implement. It typically consists of a rotating shaft with a splined end that attaches to the tractor's PTO output shaft and a yoke or other attachment mechanism on the other end that connects to the implement.

The 4 Series PTO shaft is designed to handle a maximum of 35 to 80 horsepower, depending on the specific model and configuration. It is important to always use the correct size and type of PTO shaft for your equipment, as using an undersized or incompatible shaft can result in damage to the equipment and even serious injury or death to the operator.

▍4 Series PTO Shaft Parts

A 4 Series PTO (Power Take-Off) shaft typically consists of several parts, including:

1. PTO Shaft: The main rotating shaft that transfers power from the tractor to the implement. The shaft is usually made of steel and has a splined end that attaches to the tractor's PTO output shaft.

2. Yoke: A PTO shaft yoke or other attachment mechanism is used to connect the PTO shaft to the implement. The yoke may have a spline or other connection method that matches the implement's input shaft.

3. Safety Shield: A PTO shaft safety shield or guard is used to cover the PTO shaft and protect people and animals from coming into contact with the rotating shaft. The PTO shaft safety shield is usually made of metal or plastic and may have a sliding or hinged design for easy access to the PTO shaft.

4. Bearing: A PTO shaft bearing is used to support the PTO shaft and reduce friction as it rotates. The bearing may be located on the tractor or the implement, depending on the specific design.

5. Locking Collar: A PTO shaft locking collar or other mechanism is used to secure the PTO shaft to the tractor's PTO output shaft. The locking collar may be spring-loaded or require a separate tool to engage and disengage.

6. Universal Joint: A PTO shaft universal joint or U-joint is used to transfer power between the PTO shaft and the implement. The PTO shaft U-joint allows for slight misalignment between the two shafts and helps to reduce vibration and wear.

7. Clutch: Some PTO shafts may include a clutch mechanism that allows the operator to engage and disengage the PTO without stopping the tractor's engine. The PTO shaft clutch may be manual or automatic, depending on the specific design.

▍4 Series PTO Shaft Tractor Yoke

	Dim. “A”	Dim. “B” mm	in.
Safety Slide Lock	1 3/8” x 6 Spl.	113.0	4.45”
	1 3/8” x 21 Spl.	113.0	4.45”
Quick Disconnect Yoke	1 3/8” x 6 Spl.	107.0	4.21”
	1 1/8” x Hex	107.0	4.21”
	1 3/8” x 21 Spl.	107.0	4.21”

	Dim.”A” Bore	Dim.”B”	in.	Shear Bolt
Ball Shear Yoke	1 3/8” x 6 Spl.	141.0	5.54”	3/8” - 16 Gr. 5
	1 3/4” x 20 Spl.	154.0	6.06”	3/8” - 16 Gr. 5
	1 3/8” x 21 Spl.	141.0	5.54”	3/8” - 16 Gr. 5

▍4 Series PTO Shaft Cross & Bearing Kit

	Dim. “A” mm	in.	Dim. “B” mm	in.
	27	1.06”	74.6	2.94”

▍4 Series PTO Shaft Inner Profile Yoke

	Dim. “A” mm	in.	Dim. “B” mm	in.
With Bearing Groove	36.8	1.45”	85.0	3.35”

▍4 Series PTO Shaft Outer Profile Yoke

	Dim. “A” mm	in.	Dim. “B” mm	in.
With Bearing Groove	44	1.73”	85.0	3.35”

▍4 Series PTO Shaft Inner Tube

	Length mm	in.
	1.5	59.06”
	1.0	39.37”

▍4 Series PTO Shaft Roll Pin

	Dim. “A”		Dim. “B”
	mm	in.	mm	in.
	8.0	.31”	60.0	2.36”

▍4 Series PTO Shaft Outer Tube

	Length mm	in.
	1.5	59.06”
	1.0	39.37”

▍4 Series PTO Shaft Implement Yoke

	Dim. “A”		Dim. “B”		Standard Keyway
	mm	in.	mm	in.	mm	in.
Round Bore With Keyway & Set Screw	30.0	1.18”	95.0	3.74”	8.0	.31”
	31.8	1.25”	95.0	3.74”	6.4	.25”
	34.9	1.38”	95.0	3.74”	8.0	.31”
	38.1	1.50”	95.0	3.74”	9.5	.38”
	35.0	1.38”	95.0	3.74”	10.0	.39”
	Dim. “A”		Dim. “B”		Pinhole
	mm	in.	mm	in.	mm	in.
Shear Pin With PinHole	31.8	1.25”	95.0	3.74”	6.35	.25”
	35.0	1.38”	95.0	3.74”	12.9	.50”

	Dim. “A”		Dim. “B”
	mm	in.	mm	in.
Hex Bore	28.9	1.14”	95.0	3.74”
Clamp Yoke	1 3/8” x 6 Spl.		107.0	4.21”
	1 1/4” Rd.		107.0	4.21”

▍4 Series PTO Shaft Guard

Fits Overall Driveline Length	Bearing Kit (2 per kit)
48”	961-2534
60”	961-2534
Easy Lock Replacement Kit
Guard Chain Kit

▍4 Series PTO Shaft Driveline

▍Advantages of 4 Series PTO Shaft

There are several advantages of using a 4 Series PTO (Power Take-Off) shaft:

(1) Versatility: 4 Series PTO shafts are designed to fit a wide range of tractors and implements, making them a versatile option for farmers and other agricultural professionals. They can be used with a variety of equipment, including mowers, balers, and tillers.

(2) Efficiency: 4 Series PTO shafts allow for the efficient transfer of power from the tractor to the implement, reducing the need for multiple power sources and increasing overall efficiency.

(3) Safety: 4 Series PTO shafts are designed with safety in mind, featuring guards and shields that help to prevent accidents and injuries. When used correctly, PTO shafts can be a safe and effective way to power farm equipment.

(4) Durability: 4 Series PTO shafts are typically made of high-quality materials, such as steel or aluminum, which can withstand the rigors of heavy use and rough terrain. This makes them a durable and long-lasting option for farmers and other agricultural professionals.

(5) Cost-effective: 4 Series PTO shafts are a cost-effective way to power farm equipment, as they eliminate the need for additional engines or motors. This can help to reduce overall equipment costs and increase profitability for farmers and other agricultural professionals.

▍4 Series PTO Shaft Common Applications

4 Series PTO (Power Take-Off) Shafts are commonly used in a variety of agricultural applications. Some of the most common applications include:

Mowers: 4 Series PTO shafts are often used to power rotary mowers, flail mowers, and other types of mowers used to maintain pastures, fields, and other areas.

Balers: 4 Series PTO shafts are used to power hay balers and other types of agricultural baling equipment, which are used to compress and package hay, straw, and other crops.

Tillers: 4 Series PTO shafts are often used to power tillers and other soil preparation equipment, which are used to cultivate soil and prepare fields for planting.

Spreaders: 4 Series PTO shafts are commonly used to power manure spreaders, fertilizer spreaders, and other types of agricultural spreading equipment.

Harvesters: 4 Series PTO shafts are used to power combine harvesters and other types of agricultural harvesting equipment, which are used to collect and process crops.

Irrigation pumps: 4 Series PTO shafts can be used to power irrigation pumps and other types of water management equipment, which are used to move water and irrigate crops.

Wood chippers: 4 Series PTO shafts are used to power wood chippers and other types of forestry equipment, which are used to process timber and other types of wood.

Overall, 4 Series PTO shafts are a versatile and essential component of many different types of agricultural equipment, helping farmers and other agricultural professionals to work more efficiently and effectively in the field.

4 Series PTO Shaft for Post Hole Digger	4 Series PTO Shaft for Rotary Tiller
4 Series PTO Shaft for Fertilizer Spreader	4 Series PTO Shaft for Rotary Cutter

▍Series 4 PTO Shaft Maintenance & Lubrication

Proper maintenance and lubrication of a Series 4 PTO (Power Take-Off) shaft are essential to ensure safe and efficient operation. Here are some general guidelines for maintaining and lubricating a Series 4 PTO shaft:

Regular Inspection: Inspect the PTO shaft before each use for signs of wear or damage, such as cracks, bends, or missing components. Replace any damaged parts before using the equipment.

Lubrication: Apply a high-quality lubricant, such as grease or oil, to the PTO shaft and all moving parts before each use. This helps to reduce friction and wear and prolong the life of the components.

Cleaning: Clean the PTO shaft and all components regularly to remove dirt, debris, and other contaminants that can cause damage or interfere with proper operation.

Guarding: Ensure that all guards and shields are in place and functioning properly to protect against accidental contact with the rotating PTO shaft.

Storage: Store the PTO shaft in a dry, clean place when not in use, and protect it from exposure to moisture, sunlight, and other environmental factors that can cause rust and corrosion.

Maintenance Schedule: Follow the manufacturer's recommended maintenance schedule for the PTO shaft and all associated equipment, including lubrication, inspection, and replacement of worn or damaged parts.

Overall, proper maintenance and lubrication of a Series 4 PTO Shaft can help to prevent accidents and injuries, prolong the life of the equipment, and ensure safe and efficient operation in the field.

▍Agricultural Gearboxes for 4 Series PTO Shafts 

Agricultural gearboxes are essential components in farming machinery, as they help transfer power from the tractor's power take-off (PTO) shaft to the implement's working parts. The 4 Series PTO shafts are a category of PTO shafts designed for medium to heavy-duty agricultural applications.

Here are some common types of agricultural gearboxes for 4 Series PTO shafts:

1. Rotary cutter gearbox: This type of gearbox is used in rotary cutters or mowers designed to cut through thick grass, brush, and small trees. Rotary cutter gearboxes typically have a high torque rating to handle the rigorous demands of cutting through tough vegetation.

2. Rotary tiller gearbox: Used in rotary tillers or cultivators, this type of gearbox is designed to transfer power to the tines that dig into the soil, breaking it up and mixing it. Rotary tiller gearboxes are built to withstand the high torque and heavy loads generated during tilling operations.

3. Post hole digger gearbox: This gearbox is used in post hole diggers, which are designed to dig holes for fence posts, tree planting, or other applications. The post hole digger gearbox must handle high torque as the auger digs into the ground and encounters various soil types and obstacles.

4. Fertilizer spreader gearbox: Fertilizer spreaders use this type of gearbox to distribute granular or liquid fertilizer evenly across a field. The fertilizer spreader gearbox ensures consistent spreading by controlling the speed and rotation of the spreading mechanism.

5. Seeder gearbox: This gearbox is used in seeders or seed drills, which are designed to plant seeds in rows at specific intervals and depths. The seeder gearbox ensures accurate seed placement by controlling the speed and rotation of the seeding mechanism.

When selecting an agricultural PTO gearbox for a 4 Series PTO shaft, it's essential to consider factors such as the implement's requirements, the gearbox's torque capacity, and gear ratio. Additionally, it's essential to ensure proper lubrication and maintenance to prolong the agricultural gearbox's lifespan and maintain optimal performance.