Eaton Char-Lynn 112 Series Motor Replacement | 112-1059-006 112-1068-006 Hydraulic Motor

Genlu Hydraulic stands as a premier engineered fluid technology component manufacturer, heavy metallurgical casting expert, and strategic strategic global leader specializing in high-capacity Low-Speed High-Torque (LSHT) gerotor/geroler hydraulic motors and related power components. The 112 Series Heavy-Duty Orbit Hydraulic Motor platform (encompassing the standard 6000 Series base models, including standard mounting wheel/flange variances) is custom-manufactured as a premium, structurally reinforced, and 100% drop-in interchangeable alternative to the definitive industry-baseline—the Eaton Char-Lynn signature 6000 series. We manage rapid flexible assembly setups and hold complete global logistics inventory for core high-demand field replacement codes, prominently including 112-1059-006, 112-1068-006, 112-1128-006, and 112-1209-006.

Operating as the primary power muscle for industrial chemical agitators, excavator track tracking drives, heavy marine winch drums, large utility truck crane rotators, and combine harvester feed-reels, an orbit motor must withstand intense high-pressure limits (up to 310 bar) and severe alternate shock reversals without losing stall torque. Genlu’s 112 series heavy orbit motors conform precisely to Eaton factory product manual criteria. We guarantee absolute plug-and-play retrofit engineering across standard SAE C 4-bolt pilot configurations, primary straight keyed or involute splined output shaft geometries, main 1-5/16″ 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: 112 Series Heavy-Duty LSHT Disc-Valve Orbit Hydraulic Motor (100% cross-compatible with Eaton Char-Lynn 6000 Series)

• Core Covered Specific Configurations:

  • 112-1059-006 Configuration (310 cc/rev displacement, SAE C 4-bolt mount, standard straight keyed shaft, design series 006)

  • 112-1068-006 Configuration (395 cc/rev displacement, SAE C 4-bolt mount, standard straight keyed shaft, design series 006)

  • 112-1128-006 Configuration (490 cc/rev displacement, SAE C 4-bolt mount, 17-tooth splined shaft variant, design series 006)

  • 112-1209-006 Configuration (625 cc/rev displacement, SAE C 4-bolt mount, severe-duty drive shaft profile, design series 006)

• Model-to-Displacement Mapping Metrics:

  • 112-1059 Variant: 310 $cc/rev$ ($19.0\,in^3/rev$)

  • 112-1068 Variant: 395 $cc/rev$ ($24.0\,in^3/rev$)

  • 112-1128 Variant: 490 $cc/rev$ ($30.0\,in^3/rev$)

  • 112-1209 Variant: 625 $cc/rev$ ($38.0\,in^3/rev$)

• Continuous Rated Operating Pressure: From 205 bar up to 240 bar depending on selected volumetric displacement code

• Maximum Intermittent Peak Pressure: Rated up to 310 bar (31.0 MPa / 4500 psi) handling severe cyclic reversals

• Maximum Output Torque Boundary: Continuous delivery spanning 1050 Nm to 1420 Nm; maximum intermittent peak torque safe up to 1715 Nm

• Permissible Driving Rotational Velocity Envelope: Up to 355 rpm to 705 rpm continuous (smaller displacements support higher peak velocities)

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

• Output Shaft Formats Available: 1-1/2″ Standard Cylindrical Straight Keyed Shaft; 1-1/2″ 17-Tooth Involute Splined Shaft

• Total Motor Assembly Dry Mass: Ranging from 26.5 kg to 31.0 kg (high power-density spatial optimization)

Key Technical Advantages:

• 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 88%.

• 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 240 bar loading.

• High-Pressure Shaft Seal Backed by Tapered Roller Bearings: The main drive shaft is stabilized by two oversized tapered roller bearings designed to support heavy external radial forces (such as chain sprocket tension) and bi-directional axial thrust. An integrated high-pressure viton lip seal allows the internal casing to withstand back-pressures up to 140 bar continuously without a dedicated case drain line, simplifying system plumbing.

• High Power-Density Structure Paired with a Rigid Ductile Iron Casing: The outer frame is cast from premium-grade ductile iron using high-density resin sand molding. This rigid housing prevents micro-cracking and casing distortion during abrupt system reversals or sudden lockups. The compact design delivers high power density, saving space inside equipment compartments.

Application Areas:

• Heavy Geotechnical Piling & Drills: Auxiliary winch lines on rotary drilling rigs, continuous flight auger drives, and mini-slurry wall grab hoists.

• Environmental Utility Machinery & Bulk Handling Fleets: Primary drum drives for commercial concrete transit mixers, high-torque roller brushes on industrial street sweepers, and waste compaction loops.

• Material Handling Crane Applications: Primary slewing ring动力头 gear drives for truck-mounted utility cranes, heavy-duty self-propelled modular transporter (SPMT) steering linkages, and low-speed crawling drives.

Expert Maintenance Tips:

• Mandatory Use of an Independent Case Drain Line for Heavy Profiles: Although the 112-1059-006 series incorporates a reinforced high-pressure shaft seal, it is highly recommended to remove the 7/16″ 20 UNF side drain plug and connect a dedicated drain line directly back to the reservoir for heavy-duty, fast-reversing, or series-connected installations. 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 112-1068-006), 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.

• Synchronize Multi-Disc Parking Brake Release Timings: On wheel drives or hoist winches where this motor is paired with a wet multi-disc safety brake, ensure that the pilot release pressure fully opens the brake discs before high-pressure fluid enters the motor ports. Delayed or insufficient brake release pressure will cause the motor to fight the brake mechanism, leading to severe spline deformation, system overheating, and accelerated mechanical wear.