Nachi PCR Swing Motor | PCR-2B-10A, PCR-1B-5A | CAT 303 304 Swing Device 266-6396

Nachi PCR Series Excavator Swing Device Motors

Product Overview: The Nachi PCR Series is the global benchmark for swing mechanisms in mini and compact excavators. As a highly integrated Swing Device, it combines a hydraulic motor, planetary reduction gearbox, and brake valve block into a single unit. This featured selection focuses on core models: PCR-2B-10A-P-9472A and PCR-1B-5A. This series is the OEM-standard choice for Caterpillar (CAT) 303 and 304 series excavators (Part No. 266-6396). With its compact design and precise swing control, the PCR series ensures maximum agility and stability in demanding work environments.

Key Technical Advantages:

• Highly Integrated Design: Combines the motor and planetary gears to minimize installation space, optimizing the layout of the excavator’s upper structure.

• Precise Swing Cushioning: Built-in high-performance relief valves effectively absorb hydraulic shocks during start and stop, ensuring smooth rotation and precise positioning.

• Exceptional Durability: Engineered for frequent start-stop cycles typical of excavation work, with reinforced internal gears and bearings for extended service life.

• OEM Compatibility: A perfect drop-in replacement for original swing devices on CAT 303/304 models, ensuring identical mounting interfaces for easy installation.

• Compact yet Powerful: Delivers massive torque output within an ultra-compact envelope, boosting overall machine productivity.

• Target Applications: Mini excavator swing drives, compact rotary platforms, and various hydrostatic rotary mechanisms.

Detailed Models & Parameters:

• Core Series: Nachi PCR Series Swing Drive Motor.

• Model Keywords: PCR-2B-10A, PCR-2B-10A-P-9472A, PCR-1B-5A.

• Application / OEM Part No.: CAT 303, CAT 304, 266-6396, 2666396.

• Technical Specs Decoding:

  • PCR-1B / PCR-2B: Refers to different motor displacements and reduction ratios.

  • 10A / 5A: Indicates the capacity class of the rotary components.

  • P-9472A: Specialized performance variant code for specific equipment manufacturers.

• System Components: Integrated mechanical brake, relief valves, make-up valves, and reduction gears.