Shimadzu SGP1 SGP2 Series Hydraulic Gear Pump | SGP1A32 SGP2A44 SGP2A52

The Shimadzu SGP1 and SGP2 series high-pressure gear pumps manufactured by Chengyuan Hydraulic are the premium power units designed for forklift and construction machinery hydraulic systems. This range covers the most sought-after industry models, including SGP1A32R212, SGP2A44L411, and SGP2A52L723.

As an ideal replacement for OEM forklift pumps, the SGP series is renowned for its superior volumetric efficiency and excellent contamination resistance. Chengyuan ensures 100% original-place interchangeability regarding mounting flanges, shaft splines, and porting dimensions. Every pump undergoes 100% simulated high-pressure load testing before leaving the factory, ensuring stable pressure output and long mechanical life under heavy-duty lifting and steering cycles.

Technical Specifications :

• Compatible Series: Shimadzu SGP1 / SGP2 Series

• Core Models: SGP1A32R212, SGP2A44L411, SGP2A52L723

• Geometric Displacement:

  • SGP1A32: 31.8 $cm^3/rev$

  • SGP2A44: 44.2 $cm^3/rev$

  • SGP2A52: 52.3 $cm^3/rev$

• Rated Pressure: 20.6 MPa (210 bar)

• Peak Pressure: 24.5 MPa (250 bar)

• Rated Speed: 2000 – 3000 rpm

• Minimum Speed: 500 rpm

• Rotation: R-Right (CW) / L-Left (CCW)

• Body Material: High-strength die-cast aluminum alloy

• Working Medium: Mineral-based hydraulic oil

Key Technical Advantages:

• High-Strength Three-Piece Housing: Features a high-tensile die-cast aluminum body with a precise three-piece structure. This design suppresses elastic deformation under high pressure, minimizing internal friction and maintaining peak volumetric efficiency at 20.6MPa.

• DU Bushing Support System: Internally equipped with high-performance DU bushings, providing extreme load-carrying capacity and wear resistance. This system maintains the precise alignment of the drive and driven gears even under fluctuating oil viscosity or slight contamination.

• Axial Clearance Compensation: Utilizes a floating side plate mechanism that automatically adjusts under hydraulic pressure. This dynamic compensation ensures that the pump maintains its efficiency throughout its entire service life, even as components naturally wear.

• Low-Noise Gear Tooth Profile: Gears are forged from high-hardness alloy steel with micron-level gear hobbing and heat treatment. This optimizes the contact ratio, significantly reducing fluid pulsation and mechanical noise for quieter operation.

Application Areas:

• Forklift Hydraulic Systems: Primary lift or steering pumps for 2-10 ton forklifts (e.g., Toyota, Komatsu, Mitsubishi, HELI, Hangcha).

• Compact Construction Machinery: Auxiliary hydraulic power for loaders, graders, and street sweepers.

• Sanitation Equipment: Hydraulic lifting systems for refuse compactors and waste trucks.

Expert Maintenance Tips:

• Alignment Calibration: When installing the pump to the motor or engine drive, strictly verify the coupling alignment. Excessive angular deviation will lead to premature shaft seal failure and abnormal vibration.

• Initial Priming: Never start the pump dry. Before connecting to the system, fill the pump with clean hydraulic oil via the inlet port and rotate the shaft by hand to ensure initial lubrication of the bearings and seals.

• Inlet Vacuum Monitoring: Regularly inspect the suction filter and lines. High suction resistance can cause cavitation (audible as high-frequency noise), which rapidly erodes gear surfaces and leads to catastrophic pump failure.