Eaton Char-Lynn 104 Series Hydraulic Motor Replacement | 104-1031-006 104-3498-006

Genlu Hydraulic proudly introduces our 104 (including 101, 106) Series high-performance, Low-Speed High-Torque (LSHT) hydraulic orbit motors. Engineered strictly to Eaton Char-Lynn world-proven orbital motor technical benchmarks, this series is custom-developed for relentless continuous duty where extreme driving torque is mandated at low shaft speeds. Our production lineup perfectly covers industry-standard configuration codes, including 104-1031-006 (Standard mount) and 104-3498-006 (Specialized valve-mount/integrated configuration).

Serving as the muscular “torque core” for heavy mechanical drives, Genlu unequivocally guarantees 100% Drop-in Interchangeability in mounting flange pilot diameters, drive shaft keyways/splines, main fluid port spacings, and case drain layouts relative to Eaton Char-Lynn 104 original components. Backed by our uncompromising 100% Simulation Load Testing, every single orbit motor undergoes full-pressure starting torque and low-speed stability verification before shipping, promising uncompromised operation in your most demanding industrial fluid power circuits.

Technical Specifications 

• Product Series: Eaton Char-Lynn 104 Series Low-Speed High-Torque Orbit Motor

• Target Configuration Models: 104-1031-006, 104-3498-006, 104-1031, 104-3498

• Displacement Range: 45 – 490 cm³/rev (Precisely matched to specific suffix coding)

• Rated Continuous Pressure: 17.5 – 20.5 MPa (175 – 205 bar)

• Intermittent Max Pressure: Up to 27.5 MPa (275 bar)

• Output Torque Capacity: Continuous up to 800 N·m; Intermittent peak capacity exceeding 1000 N·m

• Speed Range: Minimum stable speed $\le$ 10 rpm; Maximum operational ceiling up to 750 rpm

• Shaft Formats: Standard straight keyed, SAE splined, or tapered output configurations available

• Mounting Flanges: Standard 2-hole or 4-hole SAE magneto/diamond flange structures

Key Technical Advantages:

• Advanced Geroler® Roller-Stator Architecture: Incorporates precision-machined integral rollers inside the star-and-ring assembly (Geroler technology). By changing sliding friction into rolling friction, this geometry vastly minimizes breakaway resistance and eliminates slip-stick crawling at ultra-low speeds, stabilizing output torque.

• Independent Disc Valve Distribution: Employs a timed disc valve mechanically decoupled from the main drive shaft. This design offers far superior volumetric metering accuracy over generic shaft-valve variants, preserving crisp fluid distribution even under severe differential pressure variations or erratic oil viscosities.

• Heavy-Duty Dual Tapered Roller Bearings: The front output shaft assembly is cradled by twin high-load tapered roller bearings. This design handles immense radial and thrust shocks directly on the shaft, allowing operators to chain sprocket or gear drives straight to the motor without auxiliary pillow-block supports.

• Triple-Lip High-Pressure Shaft Seal Assembly: Built with a next-generation resilient shaft seal matrix. It survives high internal system backpressures without the mandatory usage of an external drain line, eliminating the persistent industrial challenge of front shaft-head leakage during heavy duty cycles.

Application Areas:

• Agricultural & Forestry Machinery: Combine harvester reel drives, seeding meter systems, and heavy timber chipper feed rollers.

• Construction & Drilling Equipment: Rotary drive heads for compact utility drills, vehicle-mounted recovery winches, and road milling attachment tools.

• Material Handling & Heavy Manufacturing: Industrial heavy-belt conveyor pulley drives, port container spreader slewing mechanisms, and injection molding die-clamping adjustments.

• Municipal Specialty Fleets: Street sweeper main broom rotation and refuse collection packing cylinder mechanisms.

Expert Maintenance Tips:

• Mandatory External Case Drain Protocol: While the motor is outfitted with a high-pressure shaft seal matrix, if your configuration places multiple motors in series or experiences sustained backpressure above 2.1 MPa, you must remove the case plug and plumb a dedicated drain line directly back to the reservoir to preserve internal seals.

• Minimum Influx Threshold at Low Speeds: When executing continuous operations at ultra-low speeds ($\le$ 15 rpm) under full load, ensure the hydraulic circuit maintains a sufficient minimum input volume to prevent internal slip oil-film thinning, which can accelerate wear on the Geroler profile.

• Pre-Commissioning Flushing & Air Purging: After installing a replacement motor, flush the system plumbing thoroughly before engaging mechanical links. Start the unit under diminished relief valve pressure at zero mechanical load, jogging the fluid direction bi-directionally for 5 minutes to fully vent trapped air pockets.