Franklin Electric XS Series Hydraulic Driven Centrifugal Pump

XS Series Hydraulic Driven Centrifugal Pump

How the Hydraulic Drive System Works

A hydraulic driven pump system works by connecting a hydraulic motor to the tractor or equipment auxiliary hydraulic circuit, then connecting that hydraulic motor directly to the pump shaft through the SAE spline interface. The tractor’s hydraulic pump pressurizes hydraulic fluid through the motor, which converts that hydraulic pressure into shaft rotation, which drives the centrifugal pump impeller.

The flow rate and pressure output of the XS Series hydraulic driven pump depend on the RPM the hydraulic motor delivers, which is controlled by the hydraulic flow rate from the tractor. Most modern tractors with auxiliary hydraulic outputs allow you to vary the hydraulic flow, giving you a degree of speed and flow control over the pump without additional electronic controls.

The grooved suction and discharge connections on all four models are designed for quick-coupling hose and pipe connections, which makes setup and teardown fast when moving the pump between locations in the field.

Construction Details

Volute

The heavy cast iron volute uses the same back pullout design as the belt-drive XS Series. This allows the pump end to be pulled for service without removing the volute from the mounting or disconnecting the suction and discharge piping. The volute is rotatable for installation flexibility, letting you position suction and discharge ports in the direction that best suits your hose and piping layout in the field or on a skid.

Impeller

The cast iron enclosed impeller is double keyed to the shaft for improved reliability under the torque loads that hydraulic motor drives can generate, particularly during startup when hydraulic systems can produce short bursts of higher torque. The enclosed design delivers high hydraulic efficiency in clean to mildly dirty water applications.

Seal

The standard seal is a packed box type, which is the practical choice for water truck and field irrigation applications where regular operator presence means periodic packing adjustment is not a burden. A mechanical seal option with carbon and ceramic faces, BUNA elastomers, and 300 Series stainless steel hardware is also available for installations requiring no-adjustment sealing.

Bearing Frame

The heavy duty iron bearing frame uses an oversized shaft and max-life bearings to handle the loads from hydraulic motor connection and pump operation. External grease lubrication fittings allow bearing service in the field without pump disassembly, which matters on equipment that works far from a shop.

Applications and Industries

The XS Series hydraulic driven pump is the right tool for jobs where you need high-volume water transfer but have no access to electrical power and want the simplicity and reliability of tractor hydraulic drive over a gas engine.

• Agricultural Irrigation: Tractor-mounted or skid-mounted hydraulic driven pumps are widely used in row crop irrigation, flood irrigation, and pond-to-field transfer where the tractor is already on site and electrical power is not available at the water source. The XS Series hydraulic pump attaches directly to the tractor auxiliary hydraulics for a clean, integrated solution.
• Remote Field Water Transfer: Moving water between storage tanks, ponds, and distribution points in remote fields where running power lines is not practical. The tractor provides the power, the XS Series provides the flow.
• Dust Control: Construction and road-building operations use hydraulic driven pumps on water trucks and equipment to supply water for dust suppression in areas where the truck does not have a dedicated pump drive.
• Construction Dewatering: Excavation sites use skid steer and excavator hydraulic outputs to power dewatering pumps when electrical hookups are not yet established on the site.
• Water Trucks: The grooved connections and available rotation directions make the XS Series hydraulic driven pump a practical fit for water truck installations where the truck hydraulic system provides the drive.
• Municipal and Commercial: Remote municipal water transfer and commercial irrigation where equipment hydraulic systems are the available power source.
• Mining: The heavy cast iron construction and oversized bearing frame handle the rough service conditions common in mining site water management.

Features and Benefits

• SAE B and C Hydraulic Motor Fit Options: Two spline interface sizes cover the range of hydraulic motors used on tractors and equipment from small utility tractors to large agricultural equipment. Ordering the correct fit ensures a direct, reliable connection between your hydraulic motor and the pump shaft.
• Clockwise and Counter-Clockwise Rotation: Available in both rotation directions to match the output rotation of your specific hydraulic motor. This eliminates the need for additional drive components to correct rotation direction.
• Grooved Suction and Discharge Connections: Victaulic-style grooved connections allow fast hose and pipe coupling in the field. Setup and teardown are significantly faster than threaded connections when moving equipment between locations.
• Back Pullout Volute Design: Service the pump end without disconnecting suction and discharge hoses or removing the pump from the skid. This saves meaningful time on field service calls.
• Rotatable Volute: Position suction and discharge ports in the most convenient direction for your hose and piping layout. Reduces the number of fittings needed and simplifies field installation.
• Double Keyed Cast Iron Enclosed Impeller: The double key connection to the shaft handles the startup torque loads from hydraulic drives reliably. The enclosed design delivers high efficiency in the flow range the XS Series is built for.
• Heavy Duty Bearing Frame with External Grease Fittings: Oversized shaft and max-life bearings handle the radial and axial loads from hydraulic motor connection. External grease fittings allow field bearing service without disassembly.
• Packed Box Seal Standard: Practical for field applications where operators are present for regular adjustment. Mechanical seal option available for installations requiring no-adjustment sealing.
• No Electrical Power Required: The entire power input comes from the tractor or equipment hydraulic system. No generator, no electrical hookup, and no power cord management in the field.

XS Series Hydraulic Driven vs. XS Series Belt Drive: Which Do You Need?

Both versions of the XS Series use the same cast iron pump end, back pullout design, and grooved connections. The difference is entirely in how they connect to their power source.

If your tractor or equipment has auxiliary hydraulic outputs and you want the cleanest, most integrated power solution for remote field pumping, the hydraulic driven version is the right choice. If you are running a fixed electric motor or engine belt drive setup, the frame mount belt drive version is the better fit. Call Ken’s Distributing at 303.699.7845 and we will help you choose.

Installation and Compatibility

• Hydraulic Motor Fit Selection: Confirm your hydraulic motor spline specification before ordering. B fit uses a 13-tooth 16/32 inch pitch spline. C fit uses a 14-tooth 12/24 inch pitch spline. These are not interchangeable after manufacturing.
• Rotation Direction: Confirm your hydraulic motor output rotation direction before ordering. Clockwise and counter-clockwise models are available to match. Running the pump in the wrong rotation direction will significantly reduce flow and can cause damage over time.
• Hydraulic Flow Rate: Match your tractor hydraulic output flow rate to the operating range of your hydraulic motor. Too little hydraulic flow means the pump runs below its performance curve. Too much flow can overspeed the hydraulic motor and pump beyond their design limits.
• Mounting Orientation: The XS Series hydraulic driven pump is designed for horizontal mounting. Ensure your skid or mounting frame holds the pump in the correct horizontal orientation during operation.
• Grooved Connections: Use appropriate Victaulic-style couplings for suction and discharge hose connections. Inspect couplings and gaskets before each use in field applications where connections are made and broken frequently.
• Bearing Lubrication: Use the external grease fittings at the intervals specified in the Franklin Electric service manual. Field conditions with dust and abrasive soil make regular greasing especially important for bearing longevity.
• Priming: The XS Series hydraulic driven pump is not self-priming. Fill the pump housing with water before the first startup. Install a foot valve at the water source to maintain liquid in the suction line between pump cycles.

Replacement Parts and Service

The back pullout design makes field service practical even in remote locations. The pump end can be pulled and the seal or impeller replaced without removing the volute from the mounting skid or disconnecting suction and discharge hoses. This is a real advantage when a pump seal fails in the middle of an irrigation season miles from a shop.

Ken’s Distributing Company carries genuine Franklin Electric XS Series replacement parts including packing sets, mechanical seals, impellers, and bearing kits. Call us at 303.699.7845 for parts availability and fast shipping so your pump is back in service as quickly as possible.

Browse our Franklin Electric replacement parts and repair kits for the XS Series and all other Franklin Electric pump lines.

Frequently Asked Questions

What is a hydraulic driven centrifugal pump?

A hydraulic driven centrifugal pump is powered by a hydraulic motor connected to a tractor or equipment auxiliary hydraulic circuit rather than by an electric motor or engine drive. The tractor’s hydraulic system pressurizes fluid through the motor, which converts that pressure into shaft rotation that drives the pump impeller. This eliminates the need for electrical power or a separate engine at the pump location.

What is the difference between SAE B fit and C fit on the XS Series hydraulic pump?

The B fit uses a 13-tooth involute spline with a 16/32 inch pitch for connection to smaller SAE B hydraulic motors. The C fit uses a 14-tooth involute spline with a 12/24 inch pitch for larger SAE C hydraulic motors used on higher-output tractors and equipment. Match the fit to your hydraulic motor specification before ordering.

Can I control the flow rate on a hydraulic driven pump?

Yes. The flow rate of the pump depends on the RPM delivered by the hydraulic motor, which is controlled by the hydraulic flow rate from the tractor. Most tractors with auxiliary hydraulic outputs have a flow control valve that lets you vary the hydraulic flow rate, giving you control over pump speed and output without additional electronic components.

Does the XS Series hydraulic pump need electrical power?

No. The XS Series hydraulic driven pump is powered entirely by the tractor or equipment hydraulic system. No electrical power, generator, or power cord is needed at the pump location. This makes it practical for remote field applications where running electrical power is not feasible.

Is the XS Series hydraulic driven pump self-priming?

No. The XS Series is a standard centrifugal pump and requires the housing to be filled with liquid before startup. Install a foot valve at the water source to maintain liquid in the suction line between pump cycles so the pump can restart without manual re-priming.

What rotation direction do I need for my hydraulic motor?

The correct rotation direction depends on the output rotation of your specific hydraulic motor. The XS Series hydraulic driven pump is available in clockwise and counter-clockwise rotation when facing the shaft. Confirm your hydraulic motor rotation before ordering because the rotation direction is fixed at manufacturing.

Can I get replacement parts for the XS Series hydraulic pump from Kendisco?

Yes. Ken’s Distributing Company carries genuine Franklin Electric XS Series replacement parts including packing sets, mechanical seals, impellers, and bearing kits for the hydraulic driven models. Call 303.699.7845 for parts availability and fast shipping.

Related Products

• See the XS Series frame mount centrifugal pump for belt-drive and electric motor applications
• View the Franklin Electric XS439 water truck pump, our most popular XS Series model
• Browse all Franklin Electric water truck pump models
• Compare with the Franklin Electric FMIH hydraulic driven self-priming pump
• Shop Franklin Electric replacement parts and repair kits for all series

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