Product Description
The MB and ME series large-displacement crankshaft/connecting-rod radial piston hydraulic motors manufactured by LIC Hydraulic (comprehensively spanning model footprints from ME600A, ME1300A, and ME1900 up to ME3100 and ME4100) are high-end fluid power units specifically designed for extreme heavy-duty industrial applications requiring high torque outputs and lower speed stability limits. In terms of spatial mounting configurations, output shaft parameters (splined or keyed), SAE port standards, and torque-power slope characteristics, this entire series delivers 100% drop-in interchangeability with original Mitsubishi and Kawasaki ME series radial piston hardware.
Optimized for critical global B2B industrial marine and mining supply chains, LIC has engineered enhancements into the anti-fatigue boundaries of the internal crankshaft and connecting rod friction pairs. Every ME3100 assembly undergoes 100% full-load simulated extreme work-condition factory testing prior to shipment. Sustaining continuous performance boundaries at 24.5 MPa, our motors deliver premium mechanical efficiency and cogging-free rotation at ultra-low speeds, standing as a high-end procurement solution for international OEMs and field service providers.
Technical Specifications
Accurate engineering profile based on design parameters for the ME3100 heavy-duty radial piston configuration:
Product Series: ME Series Crankshaft Connecting-Rod LSHT Radial Piston Motor
Core Model Designation: ME3100 (Including both splined and keyed heavy shaft formats)
Nominal Displacement: 3110 cm³/rev
Continuous Operating Pressure: 24.5 MPa (245 bar / 3550 psi)
Intermittent Peak Operating Pressure: 27.5 MPa (275 bar / 4000 psi)
Continuous Output Torque Rating: 12100 Nm
Maximum Intermittent Output Torque: 13600 Nm
Maximum Continuous Power Capacity: 162 kW
Rotational Speed Spectrum: 1 rpm to 150 rpm (Engineered for absolute low-speed stability)
Displacement Control: Fixed Displacement, bi-directional operation
Case Drain Interconnection: Mandatory isolated low-pressure line connection directly to the reservoir
Net Unit Weight: Approx. 325.0 kg (716.5 lbs)
Key Technical Advantages
Hydrostatically Balanced Connecting Rod Alignment: LIC incorporates fluid hydrostatic balance channels within the interface between the connecting rod shoes, the eccentric crankshaft, and the pistons. High-pressure oil is piloted directly to the matching boundary layers via capillary cross-drilling, sustaining a highly rigid oil film. This holds mechanical friction losses to a minimum, ensuring a mechanical efficiency above 92% while neutralizing low-speed stick-slip down to 1 rpm.
Heavy-Duty Monoblock Nitrided Crankshaft: The core eccentric crankshaft is forged from premium structural alloy steel, subjected to multi-axis CNC grinding and deep ion-nitriding. This yields extreme torsional fatigue limit resistance and surface hardness, managing instant shear stresses caused by sudden mechanical lockups or high-frequency bi-directional reversals in heavy industrial drives.
Axial Gap Compensating Flat Valve Distributor: Fluid distribution is governed by an advanced flat surface layout. The distribution plate utilizes system pilot pressure to automatically adjust its axial micro-clearances against wear and thermal contraction. This layout contains cross-port oil bypass and maintains low internal slippage rates over tens of thousands of operating hours.
High-Capacity Tapered Roller Bearing Infrastructure: To support massive direct external loads from driving wheels or heavy winch drums, the main drive shaft is supported by paired, wide-span tapered roller bearings. This heavy-duty assembly provides immense resistance against heavy overhung radial forces and axial thrust loads, eliminating the need for expensive external outboard support configurations.
Application Areas
The ME3100 and ME4100 series large-displacement motors excel in applications demanding high torque transmission and absolute shock resilience:
Marine & Port Automation: Heavy-duty container crane hoist drums, marine anchoring windlasses, and constant-tension mooring winches.
Mining & Metallurgical Machinery: Large-scale heavy-duty apron feeders, bulk iron ore crushers, and primary ladle turret rotational drives in steel mills.
Tunneling & Trenchless Excavation: Main cutterhead rotational drives for Tunnel Boring Machines (TBM) and secondary lift circuits on heavy slurry diaphragm wall grabs.
Heavy Process Industries: High-torque internal rubber mixers, industrial waste shredder drives, and high-viscosity chemical processing agitator lines.
Expert Maintenance Tips
Mandatory Pre-Commissioning Case Priming: Due to the substantial physical mass and precision tolerances of the ME3100 internal assembly, dry operation will cause immediate damage. Prior to initial commissioning or after a system overhaul, fill the internal motor case completely with clean anti-wear hydraulic oil through the highest available case drain plug. Jog the motor under zero load for 20 minutes to purge residual air pockets from the piston chambers.
Rigid Case Backpressure and Drain Formatting: Internal crankshaft box pressures must be strictly managed below 0.1 to 0.2 MPa. Run a dedicated case drain line of generous diameter directly back to the reservoir below the fluid level line; never combine it with main system return paths. Excessive case pressure will ruin the primary shaft seal and disrupt the hydrostatic balancing films under the rod shoes.
Implement Proactive Fluid Temperature & Filtration Checks: Large radial piston motors operating under continuous high load can trap localized thermal energy. Maintain an efficient cooling loop to stabilize case temperatures between 30°C and 55°C. Enforce system cleanliness limits calibrated to ISO 4406 18/16/13 (NAS Class 7) or cleaner, and execute regular oil analysis to monitor for microscopic metallic wear particles.
Company Profile
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