Eaton Char-Lynn 2000 Series Motor Replacement | 104-1025 105-1521 106-1122 Hydraulic Motor

Genlu Hydraulic excels as a world-class engineered fluid technology innovator, metallurgical expert, and strategic B2B global supplier specializing in high-capacity, heavy-duty Low-Speed High-Torque (LSHT) hydraulic orbit/geroler motors. The 2000 Series Heavy-Duty Hydraulic Orbit Motor platform (encompassing standard 104- Standard Mount, 105- Wheel Mount, and 106- Bearingless structural frame variations) is manufactured as a premium, structurally reinforced, and 100% drop-in interchangeable alternative to the global industrial benchmark—the Eaton Char-Lynn signature 2000 series collections. We manage highly calibrated flexible assembly setups and hold complete global logistics inventory for core high-demand field replacement codes, prominently including 104-1025-006, 105-1521-006, and 106-1122-006.

Operating as the primary hydraulic muscle driving injection molding mold-regulated apparatus, container reach stacker twistlocks, harvesters tracking gearwheels, truck-mounted industrial winches, and skid steer loader attachments, an orbit motor must withstand intense high-pressure limits (up to 310 bar) and severe alternate shock reversals without losing stall torque. Genlu’s 2000 series heavy orbit motors conform precisely to Eaton Char-Lynn factory product manual criteria. We guarantee absolute plug-and-play retrofit engineering across standard SAE A/B 2-bolt pilots, 4-bolt wheel flanges, primary straight keyed or tapered output shaft geometries, main 1-1/16″ 12 UN O-ring boss fluid connection ports, and internal Geroler® profiles. Prior to final dispatch release, every single motor assembly undergoes 100% Full-Simulation Condition Testing to verify minimum low-speed cogging limits, back-pressure sealing strength, and maximum torque outputs under continuous peak loads.

Technical Specifications 

• Product Line: 2000 Series Heavy-Duty LSHT Disc-Valve Orbit Hydraulic Motor (100% cross-compatible with Eaton Char-Lynn 2000 Series)

• Core Covered Specific Configurations:

  • 104-1025-006 Configuration (Standard mount variation, 245 cc/rev displacement, SAE 2-bolt pilot, 1-1/4″ straight keyed shaft, design series 006)

  • 105-1521-006 Configuration (Wheel mount variation, 395 cc/rev displacement, 4-bolt wheel flange, 1-1/4″ tapered shaft, design series 006)

  • 106-1122-006 Configuration (Bearingless configuration, 395 cc/rev displacement, 12-tooth internal spline mating connection, design series 006)

• Model-to-Displacement Mapping Metrics:

  • 104-1025 Variant: 245 $cc/rev$ ($15.0\,in^3/rev$)

  • 105-1521 / 106-1122 Variants: 395 $cc/rev$ ($24.0\,in^3/rev$)

• Continuous Rated Operating Pressure: 205 bar (20.5 MPa / 3000 psi) continuous loading

• Maximum Intermittent Peak Pressure: Rated up to 275 bar (27.5 MPa / 4000 psi) handling severe cyclic reversals

• Peak Instantaneous Shock Pressure: Rated up to 310 bar (31.0 MPa / 4500 psi) momentary lockup holding capability

• Maximum Output Torque Boundary: Continuous delivery spanning 710 Nm to 930 Nm; maximum intermittent peak torque safe up to 1180 Nm

• Permissible Driving Rotational Velocity Envelope: Max continuous velocity from 170 rpm (395cc) to 285 rpm (245cc); minimum stable operating velocity $\le$ 10 rpm

• Fluid Distribution Mechanism: Independent Disc Valve layout featuring integrated hydrostatic clearance compensation

• Total Motor Assembly Dry Mass: Standard Mount approx 10.5 kg; Wheel Mount approx 12.3 kg; Bearingless version approx 8.2 kg

Key Technical Advantages:

• Patented Geroler® Core Geometry with Hydrodynamic Rollers for Anti-Cogging Stability: The internal star-and-ring assembly is forged from premium alloy steel and treated with gas nitriding. The stator teeth utilize precision-machined rolling cylinders rather than solid metal contours, converting sliding contact to rolling contact. This design significantly lowers startup friction, eliminates low-speed cogging below 10 rpm, and raises starting torque efficiency above 85%.

• Independent Disc Valve Arrangement for Constant Volumetric Efficiency: The distribution loop uses a distinct disc valve isolated from the primary drive link. High-pressure system oil is routed behind the valve face to generate a hydrostatic sealing bias. Because the disc can float slightly along its axis, it automatically self-compensates for long-term face wear, maintaining peak volumetric performance under continuous 205+ bar loading.

• High-Capacity Tapered Roller Bearings to Support Extra Radial Loads: In the 104- Standard and 105- Wheel Mount configurations, the motor output section is equipped with heavy-duty dual-row tapered roller bearings. This robust mechanical architecture directly supports large external radial forces (such as high chain sprocket tension or direct-drive wheel setups up to 16,000 N) without requiring external pilot pillow blocks.

• Highly Integrated Bearingless (106-) Profiles for Compact Spaces: Engineered for space-constrained gearboxes or speed reducers, Genlu optimized the 106-1122-006 bearingless variant. This design eliminates the internal shaft and bearings, instead using a precision 12-tooth internal spline that directly mates with the gearbox input shaft. This shared-bearing architecture shortens total installation length by more than 30%.

Application Areas:

• Mobile Mobile Machinery & Agricultural Wheel Drives: High-capacity skid steer loader attachments (cold planers, road sweepers), main cotton picker spindle systems, and combine harvester header drives.

• Material Handling Crane Equipment: Primary slewing locking and rotation loops for port reach stackers, container spreaders, and utility crane winch auxiliary drums.

• Industrial Factory Automation: Heavy-duty injection molding mold-height regulation動力头 and metallurgical furnace drill spindle rotators.

Expert Maintenance Tips:

• Mandatory Configuration of an Independent Case Drain Line: While 2000 series motors feature internal check valves, it is highly recommended to remove the 7/16″ 20 UNF rear casing drain plug and route a dedicated soft hose directly to the reservoir for heavy-duty, fast-reversing, or closed-loop arrangements. Keeping case back-pressure below 15 bar allows case oil circulation to carry away friction heat, extending shaft seal life up to threefold.

• Execute a Strict Pre-Commissioning Fluid Priming Procedure: The tight mechanical tolerances within the internal Geroler assembly require immediate lubrication at startup. When installing a new motor (such as replacing part number 104-1025-006), always manually fill the housing interior with clean system hydraulic fluid through the port before applying power. Running dry, even for the first few seconds under high pressure, can cause friction scuffing on the component faces and degrade low-speed control.

• Mandatory Lubrication Protocols for Bearingless (106-) Spline Interfaces: For technicians installing the 106-1122-006 assembly, the internal spline area lacks independent oil seals and bearings. Before bolting the motor to the gearbox flange, coat the mating splines generously with extreme-pressure lithium grease, or verify that the gearbox gear oil flows directly into the spline interface. Operating with a dry spline interface under high alternating torque can cause rapid fretting corrosion, leading to stripped splines and mechanical failure.