SGP1A23R010 | Shimadzu Gear Pump 23.7cc 206bar

Product Overview

The SGP1 Series High-Pressure Gear Pumps are classic hydraulic power components developed by SHIMADZU for material handling equipment and construction machinery. Since its founding in 1875, Shimadzu has built deep technological expertise in analytical instruments, medical equipment, and industrial machinery. The SGP1 series is one of the core hydraulic product lines from Shimadzu, widely used in forklifts, construction machinery, agricultural equipment, and industrial applications.

The SGP1 series features axial clearance automatic compensation and radial hydraulic balance in an external gear pump with a three-opening construction. The bushings are equipped with DU liners, the side plates are made of bimetallic material, and the pump body consists of aluminum alloy die-cast front and rear covers with a cast iron center section—effectively enhancing performance and reliability. The aluminum alloy body features high-precision styling and low noise.

The SGP1 series has successfully withstood 1 million impact fatigue tests under 24.5 MPa high-pressure conditions, demonstrating its long-term reliability in forklift applications with frequent start-stop cycles and severe load fluctuations.

Model Code System (based on Shimadzu SGP1 series official model designation rules):

• SGP1: Series number

• Second digits (16/18/20/23/25/27/30/32/34/36) : Pump size – corresponds to different displacements

• Port Position: F = Rear cover side ports, D = Rear ports

• Port Configuration: 1 = Flange port (sides only), 2 = G screw thread

• Mounting: H = Horizontal 2-bolt

• Shaft End: 1 = SAE spline 13 teeth, 5 = SAE spline 10 teeth

• Rotation Direction: L = Counter-clockwise viewed from shaft end, R = Clockwise viewed from shaft end

• Code Number: Last three digits

SGP1A23R010 model code breakdown:

• SGP1A: SGP1 Series

• 23: Pump size – 23.7 cm³/rev displacement

• R: Rotation direction – Clockwise viewed from shaft end

• 010: Code number

SGP1A32D2H1-L389D model code breakdown:

• SGP1A: SGP1 Series

• 32: Pump size – 33.2 cm³/rev displacement

• D: Port position – Rear ports

• 2: Port configuration – G screw thread

• H: Mounting – Horizontal 2-bolt

• 1: Shaft end – SAE spline 13 teeth

• L389D: Rotation direction – Counter-clockwise

SGP1A36F1H9-R155 model code breakdown:

• SGP1A: SGP1 Series

• 36: Pump size – 36.6 cm³/rev displacement

• F: Port position – Rear cover side ports

• 1: Port configuration – Flange port (sides only)

• H: Mounting – Horizontal 2-bolt

• 9: Shaft end – (special specification)

• R155: Rotation direction – Clockwise

SGP1A20R33 model code breakdown:

• SGP1A: SGP1 Series

• 20: Pump size – 20.4 cm³/rev displacement

• R: Rotation direction – Clockwise viewed from shaft end

• 33: Code number

We specialize in the R&D and manufacturing of high-pressure pumps, motors, and valve groups. All SGP1 series models offer 100% direct interchangeability with original Shimadzu SGP1 series pumps of the same model—no modification required. Every unit undergoes 100% simulated load testing before shipment, ensuring performance validation under real-world operating conditions.

Technical Specifications

SGP1 Series General Specifications:

• Brand Series: SHIMADZU SGP1 Series

• Pump Type: External gear pump (axial clearance compensation + radial hydraulic balance)

• Construction: Three-opening construction

• Body Material: Cast iron center section, aluminum alloy die-cast front/rear covers

• Bushings: DU liners

• Side Plates: Bimetallic material

• Rated Pressure: 20.6 MPa (206 bar / 2987 psi)

• Peak Pressure: 24.5 MPa (245 bar / 3553 psi)

• Inlet Pressure Range: -0.02 ～ 0.2 MPa

• Fluid Media: Mineral hydraulic oil

• Mounting Pilot Diameter: φ82.55 (A-type)

• Port Sizes (Inlet/Outlet): Ø25 / Ø19

SGP1A23R010 Specifications:

• Displacement: 23.7 cm³/rev

• Rated Pressure: 20.6 MPa (206 bar)

• Peak Pressure: 24.5 MPa (245 bar)

• Minimum Speed: 400 min⁻¹

• Maximum Speed: 3500 min⁻¹

• Mass: Approx. 3.7 kg

• Rotation Direction: Clockwise (R designation)

• Port Sizes: Inlet Ø25 / Outlet Ø19

SGP1A32D2H1-L389D Specifications:

• Displacement: 33.2 cm³/rev

• Rated Pressure: 20.6 MPa (206 bar)

• Peak Pressure: 24.5 MPa (245 bar)

• Minimum Speed: 400 min⁻¹

• Maximum Speed: 3000 min⁻¹

• Mass: Approx. 4.2 kg

• Rotation Direction: Counter-clockwise (L designation)

• Port Position: Rear ports (D designation)

• Port Configuration: G screw thread (2 designation)

• Mounting: Horizontal 2-bolt (H designation)

• Shaft End: SAE spline 13 teeth (1 designation)

• Port Sizes: Inlet Ø25 / Outlet Ø19

SGP1A36F1H9-R155 Specifications:

• Displacement: 36.6 cm³/rev

• Rated Pressure: 20.6 MPa (206 bar)（Note: 17.2 MPa with 10-tooth spline shaft configuration）

• Peak Pressure: 24.5 MPa（reference value）

• Minimum Speed: 400 min⁻¹

• Maximum Speed: 3000 min⁻¹

• Mass: Approx. 4.5 kg

• Rotation Direction: Clockwise (R designation)

• Port Position: Rear cover side ports (F designation)

• Port Configuration: Flange port (1 designation)

• Mounting: Horizontal 2-bolt (H designation)

• Port Sizes: Inlet Ø25 / Outlet Ø19

SGP1A20R33 Specifications:

• Displacement: 20.4 cm³/rev

• Rated Pressure: 20.6 MPa (206 bar)

• Peak Pressure: 24.5 MPa (245 bar)

• Minimum Speed: 500 min⁻¹

• Maximum Speed: 4000 min⁻¹

• Mass: Approx. 3.5 kg

• Rotation Direction: Clockwise (R designation)

• Port Sizes: Inlet Ø25 / Outlet Ø19

Note: SGP1A36 is rated at 17.2 MPa (172 bar) when equipped with SAE 10-tooth spline shaft (shaft end code 5). Specifications above are based on Shimadzu SGP1 series official technical data. Refer to the pump nameplate for exact specifications.

Key Technical Advantages

1. Exceptional Durability – One Million Cycle Impact Fatigue Test

SGP1 series gear pumps have passed one million cycle impact fatigue tests under 24.5 MPa high-pressure conditions. This rigorous durability testing fully demonstrates their long-term reliability in forklift applications with frequent start-stop cycles and severe load fluctuations.

2. Axial Clearance Compensation + Radial Hydraulic Balance – Guaranteed High Efficiency

The SGP1 series features axial clearance automatic compensation and radial hydraulic balance design. With precision-engineered construction, this series maintains high volumetric efficiency and high mechanical efficiency. The three-opening construction with DU liners and bimetallic side plates effectively minimizes internal leakage.

3. High-Strength Composite Pump Body – Lightweight with Durability

The SGP1 series features a composite pump body with a cast iron center section and aluminum alloy die-cast front/rear covers. This design achieves lightweight construction while maintaining structural strength, with the aluminum alloy body featuring high-precision styling and low noise. High-performance, wear-resistant bearings ensure reliable operation under high pressure and high speed.

4. Low-Noise Operation – Improves Operator Environment

The SGP1 series is renowned for low noise, smart structure, and easy installation. The low-noise characteristic significantly improves the forklift operator’s working environment, reducing fatigue during extended operation. Wide temperature range design ensures broad applicability across varying oil temperatures and speeds.

5. Broad OEM Interchangeability – Compatible with Major Forklift Brands

SGP1 series hydraulic gear pumps offer direct replacement for original Shimadzu equipment, widely used in 1–3.5T electric forklifts. Standard mounting pilot (φ82.55 A-type) and SAE spline shafts ensure complete compatibility with original equipment.

Application Areas

• Electric Forklifts (1–3.5T)—hydraulic lift and steering systems

• Internal Combustion Forklifts—hydraulic implement systems

• Construction Machinery—excavators, pavers, road rollers, drills, bulldozers

• Building Machinery—concrete pump trucks, concrete mixer trucks

• Material Handling Equipment—hydraulic systems for various warehousing and handling equipment

• Agricultural Machinery—agricultural, forestry, and fishery machinery

• Industrial Equipment—metallurgy, mining, chemical, plastics, die-casting machinery

• Marine Machinery—steering gears, windlasses, cranes

Expert Maintenance Tips

Model Code Verification (verify each element):

SGP1 series model codes contain critical information. Before selection and installation, confirm the following:

• SGP1: Series number.

• Second digits (16/18/20/23/25/27/30/32/34/36) : Pump size – corresponds to different displacements.

• Port Position: F = Rear cover side ports, D = Rear ports.

• Port Configuration: 1 = Flange port (sides only), 2 = G screw thread.

• Mounting: H = Horizontal 2-bolt.

• Shaft End: 1 = SAE spline 13 teeth, 5 = SAE spline 10 teeth.

• Rotation Direction: L = Counter-clockwise viewed from shaft end, R = Clockwise viewed from shaft end.

• Code Number: Last three digits.

Verify Rotation Direction:

Confirm that the drive shaft rotation matches the direction code in the model – “L” indicates counter-clockwise, “R” indicates clockwise. Incorrect rotation will prevent pressure build-up and may damage internal gears and bearings.

Mounting Flange and Drive Shaft Matching:

SGP1 series mounting pilot diameter is φ82.55 (A-type). Verify that the equipment-side flange type and shaft specification match the pump configuration before installation. SGP1 series offers SAE 13-tooth (code 1) or 10-tooth (code 5) spline shaft options.

Suction Line and Inlet Pressure Requirements:

SGP1 series requires an inlet pressure range of -0.02 ～ 0.2 MPa. Ensure the suction line is properly sealed with no air leaks and the suction filter is not clogged. Use mineral hydraulic oil meeting ISO/DIN standards.

First-Start Priming Procedure:

After new pump installation or system overhaul, ensure the pump cavity is filled with oil before first start. Jog the pump at low speed and low pressure until the pump body is fully filled with oil and air is purged, then gradually increase to rated speed and working pressure. Running the pump dry will cause irreversible damage to gears and bearings.

Oil Cleanliness and Regular Maintenance:

Replace hydraulic oil and return filters every 1,000 operating hours or per equipment manufacturer recommendations. Using hydraulic oil with proper cleanliness will significantly extend pump service life. Regularly monitor pump body temperature—if it consistently exceeds +80°C, inspect the system cooling.