Eaton Char-Lynn 104 Series Hydraulic Motor | 104-1028-006 104-1228-006

The 104 Series low-speed high-torque (LSHT) orbit hydraulic motors by Chengyuan Hydraulic are high-performance power units engineered to the exact specifications of the Eaton Char-Lynn 2000 Series. This series is optimized for heavy-duty industrial and mobile applications, covering key part numbers such as 104-1028-006, 104-1228-006, 104-1819-006, 104-3359-006, and 104-1026-006.

Built with the advanced Geroler rotor technology, the 104 series offers superior mechanical efficiency and high starting torque. Chengyuan guarantees 100% original-place interchangeability regarding mounting flanges, output shafts (1-1/4″ keyed or splined), and port layouts. Every motor undergoes 100% simulated load testing prior to shipment, ensuring reliable performance in harsh environments including agriculture, construction, and maritime operations.

Technical Specifications :

• Brand Compatibility: Eaton Char-Lynn 2000 Series (104- Prefix)

• Model Matrix & Displacements:

  • 104-1028-006 (160 $cm^3/rev$)

  • 104-1228-006 (200 $cm^3/rev$)

  • 104-1819-006 (245 $cm^3/rev$)

  • 104-3359-006 (390 $cm^3/rev$)

  • 104-1026-006 (130 $cm^3/rev$)

• Rated Continuous Pressure: 200 bar (2900 PSI)

• Intermittent Peak Pressure: 250 bar (3600 PSI)

• Max Output Torque: Up to 850 Nm (Depending on displacement)

• Speed Range: 10 rpm to 900 rpm

• Output Shaft Options: 1-1/4″ Straight Keyed / Splined Shaft

• Main Port Size: 7/8-14 UNF (SAE O-ring)

• Case Drain Port: 7/16-20 UNF

Key Technical Advantages:

• Precision Geroler Rotor Technology: Utilizing rollers between the star and ring to minimize mechanical friction. This design lowers the startup torque requirement and provides enhanced radial load capacity, ensuring smooth operation even at ultra-low speeds.

• Independent Disc Valve Mechanism: The distribution valve is driven independently from the motor’s main drive link, allowing for automatic wear compensation. This maintains high volumetric efficiency throughout the motor’s life—typically 15% higher than spool valve alternatives.

• Heavy-Duty Tapered Roller Bearings: Equipped with dual high-capacity tapered roller bearings at the output shaft. This allows the motor to sustain significant radial loads, enabling direct drive of sprockets or conveyor rollers without external bearing support.

• Triple High-Pressure Shaft Seal: Integrated with a premium high-pressure seal package that withstands backpressures up to 140 bar. In many circuits, this removes the immediate need for an external case drain line, simplifying system plumbing.

Application Areas:

• Agriculture: Combine harvester reel drives, seed drill meters, and specialized harvest attachments.

• Construction: Skid steer attachments, sweeper brush drives, and mini-excavator swing systems.

• Material Handling: Marine winches, industrial conveyors, and injection molding screw drives.

Expert Maintenance Tips:

• Initial Air Bleed Protocol: Due to the disc valve architecture, always jog the motor without load to bleed air during the first startup. Dry friction can scuff the distribution valve face, leading to immediate efficiency loss.

• Fluid Cleanliness Standards: To protect the precision Geroler set, maintain system oil cleanliness at or better than ISO 4406 18/16/13. Hard particles in the fluid will scratch the rotor end faces.

• Case Drain Best Practices: If backpressure consistently exceeds 100 bar, it is highly recommended to connect the case drain port to the reservoir. This protects the shaft seal from thermal stress and premature failure.