Shimadzu SGP1 Series Gear Pump | SGP1A32D2H1-L389D SGP1-32AS1HH | Forklift Hydraulic Pump

The SGP1 Series high-pressure gear pumps from Chengyuan Hydraulic are high-performance power units fully compatible with Shimadzu engineering standards, widely used in the lifting and steering systems of leading global forklift brands. For core models like SGP1A32D2H1-L389D and SGP1-32AS1HH, we utilize reinforced aluminum alloy bodies and specially treated steel side plates. The defining advantage of the SGP1 series is its exceptional axial clearance compensation system, which maintains high output efficiency even under high-temperature and high-pressure conditions. Every pump undergoes 100% simulated condition testing before delivery to ensure that pressure pulsation and noise levels match OEM benchmarks, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series Models: SGP1 (Single) / SGP1A / SGP1B

• Nominal Displacement: 31.2 cm³/rev (Size 32)

• Rated Operating Pressure: 20.6 MPa (206 bar)

• Peak Operating Pressure: 24.5 MPa (245 bar)

• Maximum Rated Speed: 3000 rpm

• Minimum Speed: 500 rpm

• Drive Shaft Options: D2 (13-tooth Spline) / S1 (Straight Key) or specific OEM custom shafts

• Mounting Flange: H1 (2-bolt Rhombus) / Other OEM-specific patterns

• Rotation: Right-hand (CW) or Left-hand (CCW) depending on specific suffix

Key Technical Advantages:

• High-Pressure Axial Compensation: The SGP1 series utilizes a specialized “3-piece” design where floating bushings automatically adjust end-face clearances based on system pressure. This mechanism maintains volumetric efficiency above 95% at 21MPa, significantly reducing internal leakage and heat generation.

• Forklift-Specific Durability: Specifically designed for the frequent loading/unloading cycles of forklifts, we have reinforced the load-bearing capacity of the gear journals and bushings. The bushing surfaces are coated with a special wear-resistant layer that resists minor abrasions caused by fluid contamination, extending service life by over 30%.

• Excellent Low-Speed Performance: Forklifts require high volumetric efficiency at idle speeds for lifting operations. Our SGP1-32 series features precision-ground gear profiles that ensure stable and continuous flow output even at speeds as low as 500 rpm.

• Silent Gear Technology: By utilizing high-precision CNC gear grinding and profile modification, fluid-borne noise from discharge pulsation is greatly reduced. This results in quieter operation for forklifts, especially in indoor warehouse environments.

Application Areas:

• IC & Electric Forklifts: Main lifting and power steering pumps for 3-ton to 5-ton forklifts.

• Logistics Equipment: Hydraulic drives for tow tractors, stackers, and side-shift attachments.

• Agricultural Machinery: Rear-lift hydraulic systems for medium-sized tractors.

Expert Maintenance Tips:

• Inlet Seal Integrity: Due to its high-speed characteristics, the SGP1 series is sensitive to air intake. Any minor air leak in the suction line (cavitation) can damage gear surfaces quickly. Always replace the inlet O-ring with a new one during installation.

• Temperature Regulation: Forklift hydraulic tanks are often compact, which can lead to rapid oil temperature increases. Ensure the oil temperature stays below 80°C to prevent the axial compensation bushings from deforming.

• Mounting Torque Specs: When installing flange-type ports like the L389D, strictly follow the recommended torque settings for bolts to avoid deforming the pump body at the connection points.