Group 3 Agricultural PTO Pump Assemblies

Group 3 Agricultural PTO Pump Assemblies

Flowfit Group 3 agricultural PTO pump assemblies provide a complete solution for generating higher hydraulic flow directly from a tractor or machinery power take-off system.

Each assembly combines a PTO gearbox with a matched Group 3 hydraulic gear pump, providing a convenient option for agricultural, mobile and industrial equipment requiring increased pump displacement and hydraulic output.

Complete Group 3 PTO Gearbox and Pump Assemblies

Our range includes assemblies with different pump displacements, hydraulic flow rates, maximum working pressures and gearbox specifications. This allows you to select a compatible gearbox and pump combination without sourcing the components separately.

Options include aluminium and cast iron PTO gearboxes, standard Group 3 pumps and selected assemblies fitted with Walvoil gear pumps. Depending on the model, versions with a fixing plate and retaining chain may also be available.

Common Applications

• Large agricultural tipping trailers
• Hydraulic tankers and slurry equipment
• Crop sprayers and fertiliser spreaders
• Irrigation and water-transfer equipment
• Forestry and timber-processing machinery
• Hydraulic motors and larger cylinders
• Mobile plant and agricultural machinery
• Higher-flow PTO-driven hydraulic systems
• Replacement or upgraded PTO pump installations

Benefits of Group 3 PTO Pump Assemblies

• Matched PTO gearbox and Group 3 hydraulic pump assembly
• Designed for applications requiring increased displacement and flow
• Aluminium and cast iron gearbox options
• Multiple hydraulic flow rates and pressure ratings
• Standard and Walvoil Group 3 pump options
• Suitable for agricultural, mobile and industrial hydraulic systems
• Selected models available with a fixing plate and retaining chain

Choosing the Correct Group 3 PTO Pump Assembly

Selecting the correct assembly depends on the hydraulic requirements of the equipment, the PTO specification and the operating conditions.

• Required flow rate: Influences the operating speed of the connected hydraulic cylinder, motor or equipment.
• Maximum working pressure: Must be suitable for the hydraulic load and system design.
• Pump displacement: Determines the volume of hydraulic oil delivered for each pump revolution.
• Gear ratio: Determines the pump speed in relation to the PTO input speed.
• PTO speed: Must be considered when calculating the expected pump speed and hydraulic flow.
• Gearbox material: Choose aluminium or cast iron according to the application, duty and installation conditions.
• Shaft connection: Must match the PTO arrangement used on the tractor or machinery.
• Maximum gearbox power: Must not be exceeded during operation.
• Hydraulic oil capacity: The reservoir must hold enough oil for the selected pump and connected hydraulic circuit.

Need more guidance? Read our guide to choosing the right agricultural PTO pump assembly for a more detailed explanation of pump displacement, hydraulic flow, working pressure, gearbox ratios, PTO speed and other important selection factors.

Aluminium and Cast Iron Gearbox Options

Aluminium PTO gearboxes provide a compact and comparatively lightweight option for mobile installations where overall assembly weight is important.

Cast iron PTO gearboxes offer robust construction for demanding applications and operating environments. The gearbox should always be selected according to the required power rating, expected duty and installation conditions.

Fixing Plates and Retaining Chains

Selected assemblies are supplied with a fixing plate and retaining chain. The fixing plate provides a secure mounting point for the gearbox, while the retaining chain helps resist unwanted movement or rotation during operation.

This can improve installation stability on equipment exposed to frequent use, vibration or demanding agricultural working conditions.

When Should You Choose a Group 3 Pump?

Group 3 gear pumps are generally selected when a larger pump displacement or greater hydraulic flow is required than a Group 2 assembly can provide.

They are suitable for equipment using larger hydraulic cylinders, motors or circuits that require increased oil delivery. The complete hydraulic system must be designed to accommodate the selected flow rate, pressure and oil capacity.

For more compact or lower-flow hydraulic applications, view our Group 2 agricultural PTO pump assemblies.

Need Help Choosing a PTO Pump Assembly?

If you are unsure which Group 3 PTO pump assembly is suitable for your equipment, our hydraulic specialists can help you compare flow rate, pressure, displacement, gearbox material, PTO speed and shaft configuration.

Call 01584 876 033 or email sales@flowfitonline.com for product selection advice, availability and delivery information.