Eaton Char-Lynn 2000 4000 6000 Series Replacement LSHT Hydraulic Motor

The 2000, 4000, 6000, 8000, and 10000 series Disc-Valve Low-Speed High-Torque (LSHT) orbital hydraulic motors manufactured by LIC Hydraulic (including specific factory assembly codes such as 261-1486-002, 262-1137-062, 263-4539-002, and 264-1015-003) are premium fluid power components custom-engineered for heavy-duty mobile applications and rugged industrial drivetrains. In terms of mounting pilot dimensions, output shaft specifications, port configurations, and torque-speed limits, this complete line delivers 100% drop-in interchangeability with the original Eaton Char-Lynn equipment.

As a highly dependable manufacturing solution optimized for the global B2B procurement market, LIC breaks the limitations of low-grade aftermarket alternatives. Every 261, 262, and 263 series motor undergoes 100% full-load simulated work-condition factory testing before dispatch. This rigid validation guarantees that our motors provide high volumetric stability and smooth, uncompromised torque under severe low-speed idling and continuous directional reversals, presenting an ideal choice for global distributors and OEMs.

Technical Specifications

Accurate engineering profile based on standard manufacturer data for the 2000, 4000, and 6000 series codes:

• Product Series: 2000 / 4000 / 6000 Series LSHT Disc-Valve Orbital Hydraulic Motor

• Benchmark Part Numbers: 261-1486-002 / 262-1137-062 / 263-4539-002 / 264-1015-003

• Displacement Coverage: From 80 cm³/rev up to 985 cm³/rev (Across 2000 to 6000 platforms)

• Continuous Operating Pressure: 205 bar to 240 bar (3000 to 3500 psi) depending on model configuration

• Maximum Intermittent Peak Pressure: 275 bar to 310 bar (4000 to 4500 psi)

• Continuous Output Torque Rating: Up to 900 Nm (2000 Series) / 1400 Nm (4000 Series) / 2700 Nm (6000 Series)

• Continuous Rotational Speed Range: 10 rpm to 900 rpm

• Maximum Continuous Flow Rating: 75 L/min to 170 L/min (20 to 45 GPM)

• Fluid Distribution Control: Independent Disc Valve Geometry, fixed displacement, bi-directional

• Output Shaft Formats: Straight keyed, splined, or tapered shaft options (matched per 4-digit suffixes)

• Net Unit Weight: Approx. 11.0 kg (2000) / 17.5 kg (4000) / 29.5 kg (6000)

Key Technical Advantages

• Precision Geroler® Technology with Integrated Rollers: LIC utilizes state-of-the-art multi-axis CNC grinding to profile the Geroler star-and-ring mechanism. Incorporating hardened rollers minimizes static starting friction by converting sliding contact into rolling mechanics. This secures absolute smooth, cogging-free rotational motion down to 10 rpm, preventing erratic speed hunting under load.

• Hydrostatically Pressure-Balanced Disc Valve: Unlike basic spool-valve assemblies, our 261, 262, and 263 series deploy an isolated disc valve distribution setup. The valve plates dynamically adjust their axial clearance under pilot system pressure to compensate for wear and thermal contraction, sustaining a continuous volumetric efficiency above 95% at 240 bar limits.

• Massive Double Tapered Roller Bearing Layout: The front output shaft assembly is housed within high-capacity, heavy-duty tapered roller bearings. The geometric placement of the bearings is optimized to handle severe radial overhung loads (OHL) and heavy axial thrust, enabling the motor shaft to directly couple with vehicle wheels or winch drums without auxiliary external support housings.

• Triple-Lip High-Pressure Shaft Seal Assembly: Outfitted with a proprietary multi-stage Viton high-pressure shaft seal, the housing tolerates instant case backpressures up to 100 bar without requiring an active case drain line connection. This decreases piping complexity for equipment assemblers while ensuring long-term, leak-free shaft operation.

Application Areas

The Char-Lynn series replacement motors deliver high torque density and exceptional shock resistance across critical heavy industrial applications:

• Construction & Mobile Machinery: Primary wheel travel propulsion for skid steer loaders, grapple rotation loops in forestry delimbers, and rotary drive heads in vibratory piling rigs.

• Agricultural Equipment: High-torque feeder drives in combine harvesters, automated grain augers, and primary hydraulic drives for automated seeders.

• Marine & Deck Automation: Mid-to-high capacity marine anchor winches, mooring line tensioners, and cargo crane swing loops.

• Heavy Duty Material Handling: Industrial apron feeders, bulk scrap conveyor drives, and high-viscosity chemical processing agitators.

Expert Maintenance Tips

• Mandatory Pre-Priming of Motor Housing: When deploying a new replacement motor (e.g., swapping a worn component with 262-1137-062), you must pre-fill the internal case with clean anti-wear hydraulic oil through the top drain port prior to connecting the main feed lines. Jog the motor under zero load at low speeds for 15 minutes to purge air pockets from the disc valve surfaces to prevent dry galling.

• Case Drain Management in Series Circuits: Although the shaft seal resists up to 100 bar backpressure, if the machine layout positions multiple motors in a series arrangement, or if long return plumbing creates extreme surge pressures, always connect a dedicated case drain line straight back to the reservoir to maximize bearing and seal cooling life.

• Rigid Fluid Cleanliness Enforcement: Precision disc-valve designs depend on tight matching tolerances and are sensitive to particle contamination. Ensure system oil cleanliness remains strictly calibrated to ISO 4406 18/16/13 (NAS Class 7) or cleaner. Change out system return filter elements routinely to halt the spread of abrasive metal fines.