Item	Disc Geroler Motor
Model	4000 Series
Direction Of Rotation	Clockwise
Flange	4 Bolts Standard Type
Shaft	31.75mm Spline Shaft 14teeth
Charlynn Code	109-1120-006
Highlight	Spline Shaft Geroler Hydraulic Pump Motor, 14t Geroler Hydraulic Pump Motor, 109-1120-006 Geroler Hydraulic Pump Motor

This is a compatible cycloidal hydraulic pump/motor manufactured for the aftermarket, designed to replace the original model 109-1120-006 in the Eaton Char-Lynn® 1000 series. The product adopts Eaton's patented "Geroler" internal tooth design (a special cycloidal gear technology) and provides a 14-tooth spline shaft as a standard interface, which is suitable for occasions requiring direct replacement or integration with the original Char-Lynn system.

The design goal of this compatible product is to match the classic performance characteristics of the original Char-Lynn 1000 series "Geroler" motors:
• Proven Geroler technology: Compared with the ordinary "Gerotor" design, the Geroler design usually aims to achieve lower internal friction, higher volumetric efficiency and longer service life through optimized gear profiles and roller designs, especially performing excellently under low-speed and high-torque working conditions.
• Convenience of direct replacement: As a compatible part for "109-1120-006", its design goal is to be completely consistent with the original part in terms of physical interfaces such as mounting flanges, shaft dimensions, and oil port positions, thereby realizing quick and convenient direct replacement without modifying the equipment.
• Robust splined shaft connection: The 14-tooth splined shaft provides strong torsional rigidity and reliable power transmission, suitable for withstanding medium to heavy impact loads.
• Versatility: As a dual-purpose component for pumps/motors, it can function as a motor to convert hydraulic energy into rotational mechanical energy, or as a pump to convert rotational mechanical energy into hydraulic energy, providing flexibility for system design (the specific working mode needs to be confirmed according to the system circuit).

This general-purpose pump/motor is widely used in various types of equipment that have requirements for space and torque:

• Agricultural machinery: drive for the header of small harvesters, metering of seeders, fertilizer spreaders.
• Construction machinery: auxiliary systems for small vehicles, drive for mixing drums, light winches.
• Industrial equipment: coolant pumps for machine tools, conveyor belt drives, low-speed and high-torque rotating devices.
• Sanitation vehicles: drive for sweeping brushes, garbage compression devices.
• When used as a hydraulic pump: provide oil source for small hydraulic systems.

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