109-1685-006 Eaton 4000 Series High Pressure Hydraulic Motor

Item	Hydraulic Drive Motor
Model	4000 Series
Direction Of Rotation	Reversible
Fastening	4 Bolts Standard Type
Maximum Pressure	3500 Bar
Charlynn Code	109-1685-006
Highlight	3500bar Hydraulic Drive Motor, Eaton 4000 Series Motor 3500bar, Hydraulic Drive Motor 109-1685-006

Model 109-1685-006 hydraulic motor is a medium and high-pressure orbital hydraulic motor of the Eaton Char-Lynn® 4000 Series. Renowned in the disc valve motor product line, this series features a compact design and an outstanding power-to-volume ratio.

A key highlight of the 4000 Series is that it adopts a compact housing size similar to the smaller 2000 Series, while delivering the same torque as standard large-sized 4000 Series motors, with an intermittent torque rating reaching 1,166 Nm / 10,320 lb-in, thus achieving an exceptional power-to-volume ratio.

Engineered specifically for hydraulic systems of heavy-duty industrial and mobile equipment, this product boasts the following core advantages:

• Disc Valve technology, delivering higher efficiency and lower pressure drop compared with conventional spool valve distribution structures;
• Geroler® roller orbital internal structure for smooth and efficient torque output;
• Compact cast iron housing design that combines high structural strength and flexible space adaptability;
• Built-in high-pressure shaft seal capable of withstanding high case back pressure, enabling series or parallel connection of motors without additional drain lines.

The 109-1685-006 model is commonly configured with a 315cc displacement and a 1.25-inch keyed shaft output, suitable for a wide range of heavy-duty driving applications.

1. Compact Housing & High Power Density

• The design philosophy of the 4000 series is to "compress" the performance of high-torque motors into a compact housing similar to that of the 2000 series. This means the motors feature smaller size and lighter weight with the same torque output, making them especially suitable for mobile machinery sensitive to installation space and equipment self-weight.
• Compared with the 2000 series, the 4000 series achieves a significant increase in motor power-to-volume ratio. It adopts a housing size close to the 2000 series while integrating larger-sized gear sets to deliver stronger torque output capacity. It is applicable to equipment with extremely limited installation space such as skid steer loaders.

2. Disc Valve Technology - Higher Efficiency & Lower Pressure Drop
The 4000 series adopts a disc valve structure, which serves as the core technical advantage distinguishing it from traditional spool valve motors:

• Automatic Wear Compensation: The valve plate can automatically compensate for wear during operation to maintain high volumetric efficiency in the long term.
• Minimum Pressure Loss: Compared with spool valve motors, the disc valve design reduces internal pressure drop and generates higher torque output under identical input conditions.
• Superior Pressure and Flow Resistance: The disc valve structure withstands higher pressure and flow than spool valve motors, thereby delivering greater torque and power.
• Adaptable to Complex Working Conditions: Ideal for heavy-load, low-speed and frequent reversing scenarios, including snow and ice removal, road sweeping, material compaction and more.

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