HPL Series High Pressure Gear Pump | HPLPA214SMNG6G4BHY | HPLPA114 HPLPA180

LIC Hydraulic offers the HPL Series, a premium range of high-pressure external gear pumps designed for maximum performance in compact spaces. The series includes the HPLPA (standard high pressure), HPLMA (medium pressure), and HPLPT (thru-drive/tandem) versions. Featuring the flagship model HPLPA214SMNG6G4BHY, these pumps utilize high-strength aluminum extrusion bodies and advanced pressure-compensated bushings. Capable of handling continuous pressures up to $250\text{ bar}$ ($3600\text{ PSI}$), the HPL series is the preferred choice for mobile applications requiring an excellent power-to-weight ratio.

Technical Specifications (Bulleted List)

• Series: HPLPA, HPLMA, HPLPT

• Displacements: $14, 31, 48, 80\text{ cc/rev}$ (covering Group 1 & 2 frames)

• Max. Pressure: Continuous $250\text{ bar}$, Intermittent up to $300\text{ bar}$.

• Construction: High-tensile aluminum alloy with anti-friction bushings.

• Mounting: SAE and European standard 2-bolt/4-bolt patterns.

• Efficiency: Over $90\%$ overall efficiency at rated conditions.

Key Technical Advantages

• Pressure-Compensated Bushings: These components automatically adjust to maintain perfect contact with the gear faces, minimizing internal leakage and maximizing volumetric efficiency.

• Lightweight & Compact: The aluminum construction makes the HPL series significantly lighter than cast-iron alternatives, ideal for mobile vehicle weight reduction.

• Low Vibration & Pulsation: Precision-machined gear profiles ensure smooth fluid delivery, reducing stress on downstream hydraulic components like hoses and valves.

• Modular Tandem Capability: The HPLPT series allows for the assembly of multiple pump stages, enabling complex multi-circuit hydraulic control from a single drive shaft.

Application Areas

• Material Handling: Forklift mast lift pumps and steering circuits.

• Aerial Work Platforms: Scissor lifts and boom lift power units.

• Compact Construction: Auxiliary hydraulics for mini-loaders and attachments.

Expert Maintenance Tips

• Initial Priming: Always fill the pump with hydraulic fluid before the first start. Operating the pump dry for even a few seconds can cause the aluminum bushings to gall against the gears.

• Suction Line Integrity: Ensure the suction hose is rated for vacuum and has no air leaks. Air ingress (cavitation) will cause high-pitched noise and rapid internal erosion of the gear housing.

• Temperature Control: For HPL aluminum pumps, keep the oil temperature below $80\text{°C}$ ($176\text{°F}$). Excessive heat can lead to seal hardening and reduced fluid viscosity, which accelerates wear.

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