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GPY gear pump
GPY gear pump
 

Shimazu GPY Series Hydraulic Gear Pump OEM Replacement

Pump Type External Gear Pump
Displacement Range Min 2.94cc/rev, Max 11.8cc/rev
Pressure Rating Rated Pressure 13.7Mpa, Max Pressure 20.6Mpa
Speed Range Min 500 RPM, Max 3000 RPM
Material Aluminum Alloy
Mounting Type Horizontal 4 bolts
Rotation Clockwise, counter-clockwise
Key Features High Performance
OEM Manufactured Compatibility Shimazu
MOQ 10 PCS
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Shimazu GPY Series Hydraulic Gear Pump is a high-performance fixed-displacement solution designed as a reliable Shimazu OEM replacement for industrial and mobile applications. Featuring a displacement range from 2.94cc/rev to 11.8cc/rev, it delivers stable flow and high volumetric efficiency through its precision-machined aluminum alloy construction. The GPY series supports a rated pressure of 13.7MPa and peak pressures up to 20.6MPa, operating efficiently within a speed range of 500 to 3000 RPM. This pump solution also offers customized drive shafts, front cover dimensions, and port connection options, making it a versatile and durable equivalent for demanding hydraulic systems requiring compact and consistent power.

 ①Series number GPY series ④Position of ports
A:side ports		 ⑦Shaft end
   1:JIS Spline
   3:Oldham
②Mounting spigot diameter ⑤Port configuration
1:flange port
2:G screw thread		 ⑧Rotation viewing from shaft end
L=counterclockwise
R=clockwise
 ③Size ⑥Mounting
S:horizontal 4 bolts		 ⑨Code number in 3 figures
 
GPY gear pump Specification
Size Displacement Rated pressure  Speed  min¹ Inlet pressure Mass
cm³ in³ MPa bar psi MIN. MAX. kg Ib
3  2.94  0.179  20.6  206  2987  700  3000  bar
-0.20~0.30

MPa
-0.02~0.03

psi
-2.9~4.35

 1.2  2.64 
4  4.05  0.247  500 
5.8  5.70  0.348 
7  6.99  0.426 
8  7.91  0.483 
6  8.83  0.539  17.2  172  2494  1.4  3.08 
10  9.93  0.606 
11.5  11.4  0.695  13.7  137  1987  2500 
12  11.8  0.720 

NOTE
1. Figure shown indicated counterclockwise rotation “L”viewing from shaft end. Clockwise rotation “R” ismirror image of this.
2.Unless otherwise specified, tolerance on dimensionare +1.0 mm.
 
Size L₁ L₂
3  39.9  78 
4 
5.8 
7 
8 
9  43.7  91 
10 
11.5 
12 
 
Suggested Applications
In addition to standard industrial and mobile hydraulic systems, our hydraulic gear pump solutions are also widely used in:
•Construction Machinery
•Agricultural Machinery
•Material Handling Equipment
•Industrial Hydraulic Systems
•Mobile Hydraulic Systems
These application-oriented solutions support custom configurations to meet different system pressures, flow requirements, and installation conditions.
The GPY series gear pump supports extensive customization options, including drive shafts, front covers, port connections, sealing materials, and direction of rotation to meet diverse hydraulic system requirements.
Shimazu GPY Series Hydraulic Gear Pump solutions are manufactured under a rigorous quality management system with strict control over raw materials, machining precision, and assembly. Every pump undergoes a comprehensive inspection and testing process before delivery, including precise dimensional checks, pressure endurance testing, and functional performance verification to ensure operational stability. Our production processes align with ISO 9001 standards, and selected configurations are engineered to meet CE and RoHS requirements. When operated under normal conditions, we provide a 12-month warranty for GPY series solutions, delivering a reliable and durable Shimazu OEM replacement for professional industrial and mobile hydraulic applications.

Hydraulic Gear Pump – FAQ

What is an external gear pump?

An external gear pump is a positive-displacement hydraulic pump that uses two externally meshing gears to deliver stable hydraulic flow.

What applications are external gear pumps commonly used for?

External gear pumps are widely used in construction machinery, agricultural equipment, industrial hydraulic systems, material handling, and mobile hydraulics.

What pressure range can an external gear pump handle?

Most external gear pumps operate at rated pressures up to 200–250 bar, with higher peak pressure depending on design and materials.

What displacement ranges are available?

External gear pumps are available in a wide range of displacements, typically from 1 cc/rev to over 100 cc/rev, depending on series and configuration.

What speed range is suitable for external gear pumps?

Typical operating speed ranges from 500 to 3000 RPM, depending on load conditions, oil viscosity, and pump design.

Can external gear pumps be customized?

Yes. External gear pumps can be customized in terms of displacement, pressure rating, shaft type, mounting flange, port size, and rotation direction.

Are external gear pumps interchangeable with OEM brands like Rexroth?

Many external gear pumps are designed to be dimensionally interchangeable with major OEM brands such as Rexroth, Danfoss, Eaton, and Parker.

What materials are used for external gear pumps?

Common materials include aluminum alloy housings for lightweight applications and cast iron housings for higher pressure and heavy-duty use.

What hydraulic fluids can be used?

External gear pumps are compatible with mineral hydraulic oils, HLP/HV oils, and other standard industrial hydraulic fluids.

How do I select the right external gear pump?

Selection depends on pressure rating, displacement, speed range, application requirements, and installation dimensions. Contact our engineers for technical support.

Manual Download

GPY series gear pump.pdf

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