SGP1-36R114 Shimadzu Gear Pump 36.6cc 20.6MPa

Product Overview

The Shimadzu SGP1 series is a high-pressure fixed-displacement hydraulic gear pump platform designed for industrial vehicles, construction machinery, agricultural machinery and special-purpose vehicles.

According to Shimadzu’s official documentation, the SGP1 range covers 16–36 cm³/rev and uses a cast iron body, with rated pressure up to 20.6 MPa. Shimadzu also highlights the series’ ability to maintain stable performance across demanding temperature and speed conditions.

For the target model SGP1-36R114, the official Size 36 specification confirms 36.6 cm³/rev displacement, 20.6 MPa rated pressure, 24.5 MPa maximum peak pressure, 400–3000 rpm speed range and approximately 4.5 kg mass for the standard configuration.

The official assembly drawing identifies a robust material architecture: aluminum-alloy front and rear covers, cast-iron body, alloy-steel drive and driven gears, special-alloy-steel side plates and bushes, and nitrile rubber sealing elements.

For aftermarket replacement, the complete mechanical configuration must be verified. Shimadzu’s official coding system includes mounting spigot diameter, port position, port configuration, mounting, shaft type and rotation.

Technical Specifications

SGP1-36R114

• Manufacturer: Shimadzu
• Series: SGP1
• Product Type: High-Pressure Hydraulic Gear Pump
• Displacement Type: Fixed displacement
• Size: 36
• Geometric Displacement: 36.6 cm³/rev
• Rated Pressure: 20.6 MPa / 206 bar
• Maximum Peak Pressure: 24.5 MPa / 245 bar
• Minimum Speed: 400 rpm
• Maximum Speed: 3000 rpm
• Standard Mass: 4.5 kg
• Inlet Pressure: -0.02 to 0.2 MPa
• Control: Fixed mechanical displacement; no variable-displacement control
• Shaft Options: SAE spline, 13 teeth or 10 teeth
• Rotation Code: L = counterclockwise; R = clockwise, viewed from the shaft end
• Mounting Code: H = horizontal 2-bolt mounting
• Port Position: F = rear-cover side ports; D = rear ports
• Port Configuration: 1 = flange port; 2 = G screw thread
• Body Material: Cast iron
• Front/Rear Covers: Aluminum alloy
• Drive/Driven Gears: Alloy steel
• Side Plates/Bushes: Special alloy steel
• Sealing: Nitrile rubber
• Model-Code Note: In SGP1-36R114, 36 corresponds to Size 36 and R corresponds to clockwise rotation under the official coding system. 114 is a three-digit code number whose detailed definition is not disclosed in the currently accessible public Shimadzu documentation.
• Replacement Testing: Our replacement units can be subjected to 100% simulated working-condition testing according to the original application requirements.

SAE 10-Tooth Shaft Limitation

Shimadzu’s official specification table provides reduced values in parentheses for the 10-tooth SAE spline configuration:

• 13-tooth spline: 20.6 MPa rated pressure / 3000 rpm maximum
• 10-tooth spline: 17.2 MPa rated pressure / 2494 rpm maximum

Therefore, shaft type must be verified before applying the full Size 36 performance rating.

Key Technical Advantages

1. Rigid Cast-Iron Housing

The SGP1 uses a cast-iron body, providing a rigid structural base for the internal gear set and bearing interfaces. This is important for maintaining geometric stability when the pump is exposed to hydraulic and mechanical loading.

2. Alloy-Steel Gear Set

Both drive and driven gears are specified as alloy steel. Gear material and manufacturing accuracy directly influence tooth wear, meshing stability and long-term volumetric performance.

3. Special-Alloy Side Plates and Bushes

Shimadzu specifies special-alloy-steel side plates and bushes. These parts control critical axial and shaft-support interfaces, where clearance has a direct influence on internal leakage and overall pump efficiency.

4. High-Pressure Operating Capability

Size 36 is specified at 20.6 MPa rated pressure and 24.5 MPa maximum peak pressure. This makes it suitable for demanding mobile and industrial hydraulic systems, while the peak rating must not be treated as a continuous operating pressure.

5. Wide Speed Range

The standard Size 36 configuration has a documented speed range of 400–3000 rpm. This enables the pump to operate across a broad range of mobile-equipment drive conditions. Actual operating limits must still be evaluated against pressure, oil viscosity and inlet conditions.

6. Balanced Material Architecture

The combination of a cast-iron body with aluminum-alloy end covers provides structural rigidity where needed while keeping the overall pump mass controlled. The official Size 36 mass is approximately 4.5 kg.

7. Configurable Mechanical Interfaces

The official SGP1 coding system covers mounting spigot, port position, port configuration, mounting method, shaft end and rotation. This makes the platform suitable for engineered replacement and retrofit projects where mechanical interface matching is critical.

Application Areas

Typical applications for SGP1-36R114 include:

• Forklifts and industrial vehicles
• Construction machinery
• Agricultural machinery
• Special-purpose vehicles
• Mobile hydraulic power units
• Material-handling equipment
• Auxiliary vehicle hydraulic systems
• Industrial hydraulic systems

Shimadzu’s official product information explicitly lists industrial vehicles, construction machinery, agricultural machinery and special-purpose vehicles as application areas for the SGP series.

With 36.6 cm³/rev displacement, the Size 36 pump is suitable for systems requiring medium-to-high fixed hydraulic flow. At 3000 rpm, the theoretical displacement flow is:

36.6 × 3000 ÷ 1000 = 109.8 L/min

Actual delivered flow will be lower according to volumetric efficiency and operating pressure. Shimadzu’s official performance curves demonstrate that flow and efficiency vary with operating conditions.

Expert Maintenance Tips

1. Verify Rotation Before Commissioning

Under the official coding system, R means clockwise rotation and L means counterclockwise rotation when viewed from the shaft end. Rotation determines suction and discharge direction and must match the hydraulic circuit.

2. Confirm the SAE Spline Configuration

SGP1-36 is available with 13-tooth and 10-tooth SAE splines. Shimadzu specifies different pressure and speed limits for these shaft configurations, so the shaft must be verified before commissioning.

3. Protect the Inlet Circuit

The documented inlet-pressure range is -0.02 to 0.2 MPa. An undersized suction line, restricted filter, excessive oil viscosity or poor reservoir layout can increase cavitation risk, hydraulic noise and internal leakage.

4. Separate Rated and Peak Pressure

20.6 MPa is the rated pressure, while 24.5 MPa is the maximum peak pressure. Relief-valve settings and continuous system design should be based on the permitted continuous operating condition rather than the peak value.

5. Maintain Hydraulic Cleanliness

The gear teeth, side plates and bushes operate with controlled internal clearances. Contaminated hydraulic oil can accelerate wear, increase leakage and reduce volumetric efficiency. A suitable filtration and fluid-maintenance program is therefore essential.

6. Verify the Complete Mechanical Configuration

Before replacing an SGP1-36R114, verify:

• 36.6 cm³/rev displacement
• Clockwise rotation
• 13-tooth or 10-tooth spline
• Mounting spigot diameter
• Port position
• Port configuration
• Horizontal mounting arrangement
• Three-digit code 114
• Shaft extension and overall installation dimensions

The 114 field should not be decoded without the original nameplate or dimensional documentation because its detailed meaning is not provided in the currently accessible public Shimadzu coding table.

7. Apply 100% Simulated Working-Condition Testing

For forklift and mobile-equipment replacement projects, our replacement pumps can be tested against the original system’s:

• Actual rotational speed
• Operating pressure
• Hydraulic-oil temperature
• Working cycle
• Suction conditions
• Mechanical installation interfaces

This allows the replacement unit to be validated under realistic operating conditions before shipment.