Eaton 71392 70553 Series Hydraulic Piston Pump | 71392-DBS 70553-RBB | Open Loop
| Model Number | 70523-RBK, 70523-RBJ, 70553-RBS, 70553-RBB, 71392-DBV, 71392-DBS |
|---|
Product Description
The Eaton/Cessna 71392 and 70553/70523 Series from LIC Hydraulic are premium Open-Loop Axial Piston Variable Displacement Pumps. Renowned for their ultra-compact footprint and high power density, these pumps are the industry standard for mobile equipment requiring precise flow modulation. Originally developed by Cessna, these units feature a rugged swashplate design that we have refined for maximum longevity. Every pump is 100% interchangeable with OEM units and undergoes rigorous simulated-load testing to ensure peak performance upon installation.
Technical Specifications
Series Model: Eaton 71392 / 70553 / 70523
Displacement: $12.3\text{–}21.0\text{ cm}^3\text{/rev}$ ($0.75\text{–}1.28\text{ in}^3\text{/rev}$)
Rated Pressure: $210\text{ bar}$ ($3000\text{ psi}$)
Peak Pressure: $250\text{ bar}$ ($3600\text{ psi}$)
Maximum Speed: $3600\text{ rpm}$
Mounting: SAE A or B, 2-bolt patterns
Control Options: Pressure Compensator, Manual Lever, or Remote Control
Fluid Compatibility: Standard Mineral-based Hydraulic Oils
Key Technical Advantages
Lightweight Aluminum Construction: The high-strength die-cast aluminum housing reduces machine weight and improves heat dissipation, crucial for air-cooled mobile engines.
High Volumetric Efficiency: Precision-engineered piston-to-bore clearances and specialized valve plate geometry minimize internal bypass, delivering consistent flow even at maximum operating temperatures.
Fast Compensator Response: The integrated control valves provide near-instantaneous adjustment to system demand, reducing heat buildup and protecting downstream components from pressure spikes.
Extended Bearing Life: Optimized lubrication flow to the internal bearings allows for high-speed operation and resistance to radial loads, significantly increasing the MTBF (Mean Time Between Failures).
Application Areas
Turf Care & Landscaping: Zero-Turn Mowers (ZTR), compact tractors, and fairway mowers.
Utility & Municipal: Street sweepers, small snow removal units, and salt spreaders.
Compact Construction: Mini-skid steers and auxiliary power units for attachments.
Industrial HPUs: Small-scale hydraulic power units with space constraints.
Expert Maintenance Tips
Air Bleeding: After installation, air must be bled from the high-pressure line. Air entrapment causes cavitation and rapid pitting of the valve plate, leading to a permanent loss of pressure.
Case Drain Integrity: Always ensure the case drain line is connected to the highest available port on the pump body. This prevents air pockets from forming around the top pistons and shaft seal.
Filtration Standard: Maintain fluid cleanliness to ISO 18/16/13 or better. These high-speed piston pumps are sensitive to fine silt; regular filter maintenance is the most effective way to prevent premature wear.
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