Permco P5151 Hydraulic Pump - Truck Equipment Atlas

Quick Facts

Manufacturer: Permco
Product Series: 5151 Series
Product Type: Heavy-duty fixed-displacement external-gear hydraulic pump
Construction: Doweled high-strength cast-iron housing
Bearing Design: Roller-bearing configurations with application-specific shaft-end-cover options
Displacement Range: Approximately 4.50 to 7.07 cubic inches per revolution
Theoretical Flow at 1,000 RPM: Approximately 19 to 30 gallons per minute, depending on model
Maximum Pressure: Up to 3,000 psi on applicable configurations
Maximum Speed: Up to 3,000 rpm on applicable configurations
Rotation: Bi-rotational pump configurations available
Standard Mounting: SAE B two-bolt or four-bolt mounting flange
Standard Shaft: SAE B 7/8-inch, 13-tooth spline on common configurations
Porting: Dual-ported design with rear and side port options
Primary Applications: Dump, refuse, agricultural, construction, industrial, material-handling, and other heavy mobile hydraulic equipment
Production Status: Current Permco product family

Overview

The Permco P5151 is a heavy-duty external-gear hydraulic pump designed for commercial trucks, vocational equipment, agricultural machinery, and industrial hydraulic applications. It converts mechanical power from a PTO, engine drive, or other approved power source into hydraulic flow.

The 5151 Series uses high-strength cast-iron construction, alloy-steel gear and shaft components, pressure-balanced wear plates, and application-specific bearing arrangements. These features support durability under high flow, pressure, torque, and side-loading conditions encountered in demanding mobile equipment.

Multiple gear widths provide displacements ranging from approximately 4.50 to 7.07 cubic inches per revolution. Common configurations produce approximately 19 to 30 theoretical gallons per minute at 1,000 pump rpm.

The complete P5151 model code identifies the pump’s rotation, shaft-end cover, port-end cover, gear housing, displacement, drive shaft, mounting, and port arrangement. Those details must be confirmed before a replacement pump is ordered.

Key Characteristics

Fixed-displacement external-gear pump
Heavy-duty cast-iron construction
Pressure-balanced wear plates
High-strength alloy-steel gears and shafts
Multiple gear widths and displacement options
Bi-rotational configurations
Dual rear and side porting options
SAE B mounting configurations
Roller-bearing options
Available with or without selected outboard-bearing arrangements
Operating pressure up to 3,000 psi on applicable models
Operating speed up to 3,000 rpm on applicable models
Pump and motor configurations within the broader 5151 family
Designed for heavy mobile and industrial hydraulic service

Major Components

Shaft-end cover
Port-end cover
Gear housing
Drive gear and shaft
Driven gear
Alloy-steel gear set
Roller bearings
Optional outboard bearing
Pressure-balanced wear plates
Thrust plates
Input shaft
Shaft seal
Housing seals
Side hydraulic ports
Rear hydraulic ports
SAE mounting flange
Tie bolts and fasteners
Identification plate

Product Type and Construction

The P5151 is a positive-displacement external-gear pump. Two meshing gears rotate inside a close-fitting housing and carry hydraulic fluid around the outside of the gear teeth from the inlet side to the outlet side.

The housing, shaft-end cover, and port-end cover are constructed for demanding hydraulic service. Dowel alignment helps maintain the relationship between the housing and covers during assembly and operation.

Pressure-balanced wear plates help maintain sealing between the gear faces and internal surfaces. This supports hydraulic efficiency across the operating range while compensating for changes in pressure.

Available bearing and shaft-end-cover configurations allow the pump to be matched to direct PTO mounting, remote drives, and applications with different shaft-support requirements.

How the Hydraulic Pump Works

A PTO or another approved mechanical drive rotates the P5151 input shaft. The drive gear turns the driven gear inside the pump housing.

As the gear teeth separate at the inlet, they create expanding spaces that draw hydraulic fluid into the pump. Fluid becomes trapped between the gear teeth and housing and travels around the outside of the rotating gears.

When the gear teeth mesh again at the outlet, the spaces decrease and force oil into the pressure circuit. Because the pump has fixed displacement, its theoretical flow increases directly with shaft speed.

The pump supplies hydraulic flow rather than creating pressure independently. Pressure develops when the cylinder, motor, valve, hose, or other system component resists that flow.

Position and Function Within the Vehicle

The P5151 may mount directly to a compatible PTO or be installed remotely and driven by an approved hydraulic-pump driveline. Its position depends on the truck’s transmission, PTO opening, frame, driveshaft, exhaust system, tanks, suspension, and body equipment.

The pump’s function is to convert rotary mechanical energy into hydraulic flow. That flow may operate dump cylinders, refuse equipment, conveyors, augers, hydraulic motors, cranes, spreaders, agricultural machinery, or other mobile equipment.

Because the 5151 Series includes several port, shaft, mounting, and bearing arrangements, the pump can be configured for a wide variety of mobile and industrial installations.

Common Specifications

Pump design: Fixed-displacement external-gear pump.
Construction: Doweled high-strength cast iron.
Gear and shaft material: High-strength alloy steel.
Gear widths: Common published sizes include 1-3/4, 2, 2-1/4, 2-1/2, and 2-3/4 inches.
Displacement range: Approximately 4.50 to 7.07 cubic inches per revolution.
Theoretical flow range at 1,000 rpm: Approximately 19 to 30 gallons per minute.
Maximum pressure: Up to 3,000 psi on applicable models; some larger-displacement configurations have lower limits.
Maximum speed: Up to 3,000 rpm on applicable models; maximum speed decreases on some larger-displacement configurations.
Standard rear ports: Common configurations use 1-1/2-inch NPT rear ports.
Side ports: Common configurations use side ports up to 1-1/2-inch NPT.
Standard mounting: SAE B two-bolt or four-bolt flange.
Common shaft: SAE B 7/8-inch, 13-tooth spline.
Rotation: Application-specific clockwise, counterclockwise, or bi-rotational configuration.

Final specifications depend on the complete assembly code. Pressure, speed, torque, displacement, rotation, ports, bearings, and shaft options must be confirmed for the exact pump.

Displacement, Flow, Pressure, and Operating Capacity

The P5151’s displacement is determined primarily by its gear width. Wider gears move more hydraulic fluid during each shaft revolution and therefore produce more theoretical flow at a given speed.

Published displacement options range from approximately 4.50 to 7.07 cubic inches per revolution. Theoretical flow at 1,000 rpm ranges from approximately 19 to 30 gallons per minute.

Maximum pressure and speed vary by displacement and configuration. Smaller-displacement models may support pressure and speed ratings up to 3,000 psi and 3,000 rpm, while the largest configurations may have lower published limits.

The hydraulic system must remain within the ratings of the exact pump, PTO, shaft, transmission, valves, hoses, cylinders, motors, and driven equipment.

Gear and Bearing Design

The P5151 uses alloy-steel gears and shafts designed to transmit substantial hydraulic-pump torque. Proper gear alignment and bearing support help maintain internal clearances under load.

Roller-bearing configurations support the gear shafts and can provide long service life when the pump receives clean oil and remains within its load limits.

Selected shaft-end-cover configurations may include an outboard bearing for additional shaft support. The correct cover and shaft arrangement depends on the mounting and drive method.

Radial or axial shaft loads should not be assumed acceptable merely because an outboard bearing is present. The complete Permco configuration must be approved for the intended drive arrangement.

Pressure-Balanced Wear Plates

Pressure-balanced wear plates help maintain controlled contact and sealing at the sides of the gear set. Hydraulic pressure assists the plates in compensating for operating forces and internal clearance.

This design helps reduce internal leakage and maintain pump efficiency over a range of pressures. Wear plates remain sensitive to contaminated oil, inadequate lubrication, excessive heat, and pressure beyond the approved rating.

Reduced flow at normal pump speed can indicate worn gears, damaged wear plates, scoring, bearing wear, or leakage elsewhere in the hydraulic system.

PTO Speed and Pump Rotation

Pump speed is determined by engine rpm, transmission PTO-drive gearing, and the selected PTO ratio. The combination should deliver the required flow without exceeding the maximum speed of the exact P5151 configuration.

Rotation is identified through the Permco assembly code and is viewed from the shaft end according to the manufacturer’s identification method.

Bi-rotational configurations can simplify certain installations, but port selection and hydraulic plumbing must still correspond to the direction of rotation and intended flow path.

Before initial operation, the installer should confirm rotation, inlet location, outlet location, and PTO output direction.

Hydraulic Circuit and Equipment Integration

A complete P5151 hydraulic system may include:

Transmission-mounted PTO
Direct- or remote-mounted P5151 pump
Hydraulic reservoir
Suction hose
Pressure hose
Return hose
Directional-control valve
Pressure-relief valve
Hydraulic filter
Oil cooler where required
Hydraulic cylinders or motors
Pressure and temperature monitoring
Operator controls and safety interlocks

The pump, PTO, reservoir, plumbing, valves, and actuators must be engineered as one system. Pump displacement and shaft speed determine flow, while system pressure determines the torque required from the PTO.

Side and Rear Porting Options

The 5151 Series uses dual-porting options that can provide rear and side hydraulic connections. Common configurations include 1-1/2-inch NPT rear ports and side ports ranging up to 1-1/2-inch NPT.

Multiple port locations can help installers route hoses around frame rails, PTOs, driveshafts, exhaust components, reservoirs, and body equipment.

Unused ports must be sealed with properly rated plugs. The active inlet and outlet must be identified for the pump’s rotation and assembly configuration before operation.

Incorrect port selection can cause the pump to run without adequate oil, pressurize the wrong circuit, damage the shaft seal, or fail immediately.

Controls and Electronic Integration

The P5151 is a mechanically driven fixed-displacement pump and does not normally contain electronic displacement controls. It produces flow whenever the PTO or other mechanical drive rotates it.

System controls may include:

PTO engagement switch
Engine-speed control
Hydraulic directional valves
Electric-over-hydraulic valve controls
Pressure switches and transducers
Temperature sensors
Flow controls
Equipment-control modules
Body-equipment interlocks
Emergency-stop controls

The control-valve arrangement must provide a safe flow path whenever the pump is operating. Deadheading the pump without appropriate relief protection can cause immediate pressure overload.

Efficiency, Heat, and Lubrication

Pressure-balanced wear plates help the P5151 maintain hydraulic efficiency by reducing internal leakage around the gear faces. Efficiency still changes with speed, pressure, temperature, fluid viscosity, and component wear.

Hydraulic fluid lubricates the gears, bearings, wear plates, and internal surfaces. Contaminated, aerated, overheated, or unsuitable fluid can cause scoring, bearing damage, seal wear, and reduced output.

Heat may result from excessive pressure, continuous relief-valve flow, internal leakage, restricted plumbing, an undersized reservoir, or an operating cycle beyond the system’s cooling capacity.

Oil coolers and larger reservoirs may be required for continuous-duty or high-power applications.

Duty Cycle and Operating Conditions

The permissible duty cycle depends on displacement, pump speed, pressure, hydraulic-fluid temperature, inlet condition, bearing configuration, PTO capacity, and application.

High pressure combined with large displacement creates substantial shaft torque. Operating continuously near maximum pressure can exceed the power available from the PTO or create excessive hydraulic heat.

Cold fluid increases suction restriction and pump-input torque. The hydraulic system should be warmed at reduced pressure and speed before full-load operation in cold conditions.

High ambient temperature, contaminated oil, restricted airflow, and long operating cycles may require reduced load, additional cooling, or a different pump configuration.

Mounting and Installation

The P5151 must be installed with the correct mounting flange, shaft, rotation, ports, speed, displacement, and bearing arrangement. The complete Permco assembly code should be verified before installation begins.

The installer should confirm:

Correct displacement and gear width
Correct direction of rotation
Compatible PTO flange and output shaft
Adequate PTO torque and horsepower
Maximum pump speed
Correct inlet and outlet ports
Suction-hose diameter and routing
Pressure-hose rating
Reservoir size and placement
Relief-valve setting
Pump-support requirements
Remote-driveline alignment where applicable
Frame, exhaust, and driveshaft clearance
Proper priming before startup

The pump should never be started dry. The housing, suction plumbing, and hydraulic circuit should be filled and vented according to Permco’s installation requirements.

PTO and Vehicle Compatibility

The P5151 can be used with a compatible Muncie, Parker Chelsea, Bezares, or other approved PTO when the mechanical connection and performance ratings match.

Compatibility depends on:

Transmission model and PTO opening
PTO series and output
PTO ratio and rotation
Pump displacement
Maximum hydraulic pressure
Required flow
Pump shaft and mounting flange
Direct- or remote-mount installation
Available chassis clearance
Hydraulic-equipment duty cycle

A physical connection between the PTO and pump does not confirm that the PTO can safely provide the required torque and horsepower.

Hydraulic Fluid, Filtration, and Reservoir Compatibility

The hydraulic fluid must provide suitable viscosity, lubrication, anti-wear protection, oxidation resistance, and temperature performance for the pump and complete system.

The reservoir should contain enough usable oil for the application and provide adequate cooling, air separation, contamination settlement, and thermal-expansion space.

The suction line should be short, large, and free of unnecessary restrictions. Permco’s published information for common 5151 configurations identifies a maximum inlet vacuum limit that must be respected.

Filtration should maintain the required cleanliness without starving the pump inlet or restricting return flow. Reservoir breathers should be serviced regularly.

Common Applications

Dump trucks
Dump trailers
Refuse trucks
Roll-off trucks
Hooklift trucks
Concrete mixers
Material spreaders
Hydraulic conveyors
Agricultural equipment
Feed and grain equipment
Construction machinery
Industrial hydraulic power units
Hydraulic motors and augers
Utility and service trucks
Heavy mobile hydraulic equipment

Advantages

Heavy-duty cast-iron construction
High-strength alloy-steel gears and shafts
Pressure-balanced wear plates
Multiple displacement options
Flow capability up to approximately 30 gallons per minute at 1,000 rpm
Pressure capability up to 3,000 psi on applicable models
Speed capability up to 3,000 rpm on applicable models
Bi-rotational configurations
Dual side and rear port options
SAE B mounting compatibility
Roller-bearing configurations
Direct- and remote-drive flexibility
Broad mobile and industrial application range
Rebuildable component design

Limitations or Considerations

Pressure and speed limits vary by displacement
Largest configurations may have lower maximum ratings
Fixed displacement cannot automatically adjust to flow demand
Flow changes directly with pump speed
Large displacements create substantial PTO torque demand
Port selection must match the pump’s rotation
Requires clean hydraulic fluid
Sensitive to inlet restriction and cavitation
Direct-mounted weight may require additional support
Remote drives require alignment and guarding
Incorrect shaft-end-cover selection can create compatibility problems
Complete assembly codes can be complex
Replacement pumps must match more than displacement alone

Driver and Operator Experience

The operator normally controls the P5151 through the truck’s PTO and the hydraulic equipment controls. Once the PTO engages, pump speed follows engine speed and the PTO ratio.

A properly sized system should provide predictable equipment movement without excessive engine speed. Slow operation, jerking, unusual pump noise, overheating, or reduced lifting force can indicate hydraulic-system problems.

Operators should avoid operating against the pressure-relief valve longer than necessary. Continuous relief operation creates heat and places unnecessary load on the pump, PTO, and engine.

PTO Engagement and Hydraulic Operating Procedure

The exact procedure depends on the vehicle, PTO, hydraulic circuit, and driven equipment. A general sequence may include:

Position and secure the vehicle as required.
Inspect the pump, hoses, reservoir, and equipment.
Confirm that the hydraulic-fluid level is correct.
Place the transmission and vehicle controls in the approved PTO mode.
Reduce engine speed to the approved engagement range.
Engage the PTO.
Allow cold hydraulic fluid to warm at reduced pressure.
Operate the equipment within approved pressure and speed limits.
Monitor noise, temperature, pressure, and equipment response.
Return hydraulic controls to their approved neutral position.
Reduce engine speed.
Disengage the PTO and confirm that the equipment has stopped.

This overview does not replace instructions from Permco, the PTO manufacturer, the vehicle builder, or the equipment manufacturer.

Inspection and Wear Points

Pump housing
Shaft-end and port-end covers
Input shaft and spline
PTO mounting flange
Pump-support bracket
Remote driveline where equipped
Shaft seal
Side and rear ports
Port plugs and fittings
Suction hose
Pressure and return hoses
Hydraulic-fluid condition
Reservoir level
Filter indicators
Operating temperature
Abnormal noise or vibration

Lubrication Requirements

The pump’s gears, bearings, wear plates, and internal surfaces are lubricated by the hydraulic fluid flowing through the unit.

The pump and suction line must be filled or primed according to the installation instructions. Dry operation can damage the gears, bearings, wear plates, and shaft seal.

The fluid level should remain high enough to prevent the pump from drawing air during every operating condition. Hydraulic oil should be replaced based on contamination, condition, temperature history, and equipment requirements.

Maintenance and Ownership Notes

Inspect the P5151 regularly for loose fasteners, hydraulic leakage, shaft-seal leakage, damaged hoses, unusual noise, excessive heat, and changes in equipment performance.

Filters and reservoir breathers should be serviced before restriction or contamination damages the pump. Suction hoses should be inspected for internal collapse as well as visible exterior damage.

A recurring shaft-seal leak can result from misalignment, excessive inlet vacuum, high return pressure, unsupported pump weight, a damaged shaft, heat, or contamination.

Before installing a replacement pump, inspect and clean the reservoir, hoses, valves, cooler, cylinders, and motors as necessary. Debris from a failed pump can damage the replacement unit.

Common Pump and Hydraulic-System Problems

Pump produces no flow: An incorrect rotation, disengaged PTO, broken shaft, wrong port connection, empty reservoir, blocked inlet, trapped air, or internal damage may prevent flow.
Cavitation noise: A restricted suction line, undersized hose, low oil level, cold fluid, excessive pump speed, clogged breather, or collapsed inlet hose may cause cavitation.
Aerated hydraulic fluid: Loose inlet fittings, low reservoir level, poor return-line placement, damaged seals, or turbulent reservoir flow may introduce air.
Low flow: Low pump speed, internal wear, damaged wear plates, bearing wear, suction restriction, valve leakage, or incorrect displacement may reduce output.
Low hydraulic pressure: Pump wear, relief-valve problems, valve leakage, cylinder leakage, motor wear, or excessive equipment load may prevent normal pressure.
Hydraulic system overheats: Continuous relief flow, excessive pressure, internal leakage, restricted plumbing, an undersized reservoir, or inadequate cooling may generate heat.
Shaft-seal leakage: Seal wear, excessive inlet vacuum, misalignment, shaft damage, high case pressure, heat, or unsupported weight may cause leakage.
PTO or shaft failure: Excessive hydraulic pressure, oversized displacement, pump seizure, pressure spikes, or an incorrectly rated PTO may overload the mechanical drive.

Safety and Service Precautions

Never install or service the pump while the engine is running. Disengage the PTO, remove the ignition key, secure the vehicle, and chock the wheels.

Release hydraulic pressure before disconnecting hoses, fittings, valves, or pump components. Accumulators and suspended equipment may retain pressure after the engine and PTO are switched off.

Raised bodies, booms, cylinders, or other equipment must be supported by approved mechanical blocking before service. Hydraulic pressure alone must not be trusted to support equipment.

Never use bare hands to search for leaks. High-pressure hydraulic fluid can penetrate skin and requires immediate emergency medical treatment.

Identification Information

The complete Permco assembly code identifies the exact pump configuration. Record the identification plate before ordering a replacement pump or internal components.

Permco 5151 Series designation
Complete assembly code
Pump or motor designation
Shaft-end-cover code
Port-end-cover code
Gear-housing code
Gear width and displacement
Drive-shaft code
Direction of rotation
Bearing configuration
Mounting flange
Side and rear port sizes
PTO manufacturer and model
Vehicle and equipment application

Do not identify a P5151 replacement solely by appearance or approximate flow. Similar housings may contain different shafts, gears, bearings, ports, rotation, and displacement.

Buying Considerations

Calculate the required hydraulic flow.
Confirm the maximum operating pressure.
Select the appropriate displacement and gear width.
Determine the pump speed produced by the PTO.
Confirm clockwise, counterclockwise, or bi-rotational requirements.
Match the mounting flange and input shaft.
Select the required side or rear ports.
Choose the correct bearing configuration.
Verify PTO torque and horsepower capacity.
Determine direct- or remote-mount requirements.
Check chassis and equipment clearance.
Size suction, pressure, and return hoses correctly.
Confirm reservoir, filtration, and cooling capacity.
Record the complete Permco assembly code.
Use an experienced mobile-hydraulic installer.

Variants and Configurations

Multiple gear widths
Displacements from approximately 4.50 to 7.07 cubic inches
Clockwise rotation
Counterclockwise rotation
Bi-rotational configurations
SAE B two-bolt mounting
SAE B four-bolt mounting
SAE B spline-shaft configurations
Side-port configurations
Rear-port configurations
Roller-bearing arrangements
Outboard-bearing options
Direct PTO mounting
Remote driveline mounting
Pump and motor versions within the 5151 family

Comparison to Similar Equipment

Compared with the Muncie E Series Hydraulic Pump, the P5151 is a general heavy-duty gear pump offered with multiple port, shaft, bearing, and displacement options. The Muncie E Series is a specialized dump pump with integrated raise, hold, and lower controls.

Compared with the future Permco DM-640 Dump Pump, the P5151 is intended for broader mobile and industrial hydraulic applications. The DM-640 combines a gear pump with an integrated dump-control valve.

Compared with the Parker F1 Hydraulic Pump, the P5151 uses external-gear construction. The Parker F1 uses a bent-axis axial-piston design capable of higher pressure in suitable applications.

Compared with the future Bezares BEZA Lightweight Hydraulic Pump, the P5151 emphasizes heavy-duty cast-iron construction and multiple traditional North American mounting and port options.

Best Fit For

Heavy mobile hydraulic equipment
Dump and construction trucks
Refuse and roll-off equipment
Concrete mixers
Agricultural machinery
Hydraulic conveyors and augers
Equipment requiring 19 to 30 gallons per minute at 1,000 rpm
Systems operating at up to 3,000 psi when approved
Applications requiring cast-iron construction
Installations needing side or rear port flexibility
Direct PTO-mounted pumps
Remote-driven hydraulic pumps
Fleets requiring rebuildable heavy-duty gear pumps

Related Vehicle and Trailer Types

Related Truck and Trailer Models

Related PTO and Hydraulic System Types

Related PTO and Hydraulic Products

Related Equipment Systems

Related Guides

Regulatory and Compliance Notes

The P5151 installation must comply with applicable vehicle, hydraulic-system, workplace-safety, equipment-guarding, hose-routing, and final-stage manufacturing requirements.

Every pressure-containing component must be rated for the system’s maximum pressure, flow, temperature, and operating environment. Proper pressure-relief protection is required.

The pump and hydraulic equipment must not interfere with steering, braking, driveline, exhaust, emissions, fuel, electrical, or stability systems. Added equipment must remain within the truck’s axle and gross weight ratings.

Real World Operating Notes

A larger-displacement P5151 produces more flow but also requires more input torque at the same hydraulic pressure. The largest available pump is not automatically the best choice.

Port flexibility can simplify hose routing, but the unused ports must be plugged correctly and the selected inlet and outlet must match the pump’s rotation.

Many apparent pump failures originate elsewhere in the hydraulic circuit. Low oil, restricted suction plumbing, clogged breathers, leaking valves, worn cylinders, or an incorrectly adjusted relief valve can produce similar symptoms.

After a major internal failure, the reservoir, cooler, valves, hoses, cylinders, and motors should be cleaned and inspected. Metal contamination left in the system can quickly damage a replacement pump.

Frequently Asked Questions

What is the Permco P5151 Hydraulic Pump?

The P5151 is a heavy-duty cast-iron external-gear pump used in mobile and industrial hydraulic systems.

What displacements are available?

Common published configurations range from approximately 4.50 to 7.07 cubic inches per revolution.

How much flow can a P5151 produce?

Depending on displacement, published theoretical flow ranges from approximately 19 to 30 gallons per minute at 1,000 pump rpm.

What is the maximum pressure?

Applicable configurations are rated up to 3,000 psi. Some larger-displacement models have lower published maximum-pressure ratings.

Is the P5151 bi-rotational?

Bi-rotational configurations are available. The exact pump model and port arrangement must still be confirmed before installation.

Can the P5151 mount directly to a PTO?

Yes. Direct-mount configurations are possible when the PTO flange, shaft, rotation, speed, torque, and horsepower ratings match.

Why does the P5151 have side and rear ports?

Multiple port locations provide installation flexibility and allow hoses to be routed around chassis and equipment obstructions.

What causes a P5151 to become noisy?

Common causes include cavitation, low fluid, suction restriction, excessive speed, aerated oil, cold fluid, bearing wear, misalignment, or PTO problems.

Can the P5151 be used as a hydraulic motor?

The broader 5151 family includes pump and motor configurations. A pump should not be used as a motor unless its complete Permco configuration is approved for motor operation.

How is the correct replacement identified?

Use the complete Permco assembly code, including the shaft-end cover, port-end cover, gear housing, displacement, drive shaft, rotation, bearing, and port information.

Availability and Where to Find

Permco P5151 pumps, motors, service components, seals, gears, shafts, bearings, port covers, and mounting equipment are available through Permco distributors, commercial-truck equipment dealers, hydraulic specialists, vocational-equipment installers, and heavy-duty parts suppliers.

Availability depends on displacement, shaft-end cover, port-end cover, rotation, drive shaft, bearing arrangement, mounting flange, and port configuration.

Current product information, official literature, distributor resources, and product-selection assistance are available through the Permco product library and Permco literature library.

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