Sauer danfoss K and L Type Plug-in Variable Hydraulic Motors

The L/K series is a family of two-position, variable-displacement axial piston motors built for both closed-loop and open-loop hydrostatic circuits. "L" and "K" simply denote different displacement ranges within the same compact housing platform — they share a common package size, mounting footprint, and rotating-group architecture, which makes them easy to swap and standardize across a product line.

Rather than being fixed-output motors, L/K motors let designers dial in the exact torque-and-speed characteristic a machine needs, then shift between a high-torque/low-speed setting and a low-torque/high-speed setting as load conditions change — all without adding external valving or a separate control module.

Real-World Applications

Agricultural Machinery

Combine harvesters, self-propelled sprayers, and specialty harvesters rely on L/K motors for propel and header drive functions. A K45 motor, for example, might drive a header at high torque during heavy crop conditions, then shift to a faster, lower-torque state for road transport between fields.

Material Handling Equipment

Telehandlers, aerial lifts, and forklifts benefit from the motor's compact three-clean-side design, which simplifies hose routing in cramped chassis compartments. The high-capacity bearings and dust-sealing features also hold up well in dusty warehouse or yard environments.

Road Building and Compaction

Asphalt pavers and rollers use L/K motors in propel and vibration-drive circuits, where the ability to shift between high-torque creeping speeds and faster travel speeds directly affects productivity on the job site.

Maintenance and Reliability Considerations

Because the L/K platform reuses well-established axial piston architecture, service intervals and failure modes are well understood in the field:

Contamination control is the single biggest driver of piston motor longevity — keep filtration tight, especially in dusty agricultural or construction environments.

Case drain monitoring helps catch internal wear (worn pistons, scored cylinder blocks) before it becomes a catastrophic failure.

Displacement control linkage/servo inspection should be part of routine service, since the two-position shifting mechanism is the one subsystem not present on fixed-displacement equivalents.

For more information on the KC/LC hydraulic motor, please visit https://www.baolilaihydraulic.com/product/.

Specifications

Selection Table

Q1: What's the difference between the L and K designations?

A1: Both are part of the same compact motor platform sharing a common package size and mounting footprint. The letters simply group different displacement variants — L covers the 25–35 cm³ range, and K covers the 38–45 cm³ range, each with its own pressure and speed ratings.

Q2: What mounting options are available?

A2: SAE-B, two-bolt, and cartridge (plug-in) mounting configurations are all available, which is what allows the motor to integrate into existing gearboxes or housings without custom machining.

Q3:How to purchase a KC/LC hydraulic motor?

A3: You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.

Q4:What is the price and delivery time of the KC/LC hydraulic motor?

A4: The specific price and delivery time will be provided based on the specific model you provide.