NACHI PCR‑4B‑20A Swing Housing Base Assembl

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Product details

NACHI PCR‑4B‑20A Original Swing Housing Base Assembly

Product Overview

The NACHI PCR‑4B‑20A swing housing base assembly is a key structural component for the slew motor. It bears mechanical load and forms the main mounting cavity for internal motor parts. Matching perfectly with the complete hydraulic system, this component ensures stable rotary output for the Machine. As the original housing base assembly, it maintains precise dimensional tolerance to cooperate with internal gears, pistons and sealing groups of the slew motor.

Technical Specifications

- Part Model: PCR‑4B‑20A

- Brand: NACHI

- Product Name: Swing Housing Base Assembly

- Application: Slew / swing hydraulic motor

- Original Equipment: Genuine OEM structure housing

- Matching components: Internal rotor, piston assembly, seal kits, bearing set

- Function: Main body housing, installation support, oil‑flow channel carrier for swing motor

Working Principle

This swing housing base assembly acts as the outer framework of the slew motor. Hydraulic oil flows through internal oil passages inside the housing base, transmitting pressure to the motor’s internal moving parts. The assembly provides rigid support when the machine performs rotary action. It locks the relative position of bearings and internal components, prevents offset during high‑torque rotation, and keeps the hydraulic system oil‑circuit sealed to avoid external leakage.

Core Advantages

1. Original NACHI standard casting and machining size, direct fit, no modification required during replacement

2. High‑strength alloy casting, good shock‑resistance, anti‑deformation under heavy rotary load

3. Precision‑machined oil ports and mounting surfaces, excellent flatness for seal installation, effectively reduces oil leakage risk

4. Strict quality control for casting, heat‑treatment and finish‑machining; stable long‑term performance under frequent forward‑reverse rotation

5. Protects internal fragile motor parts from impact and dust, extends the whole slew motor service life

Application Scope

Mainly used for construction machinery equipped with NACHI PCR‑4B‑20A slew motor. Widely applied on mini‑excavators and rotary working Machine. Installed as the main base housing of swing motor inside the hydraulic system, undertaking rotary support and hydraulic oil distribution. Suitable for earth‑moving, landscaping, municipal engineering and frequent swing operation conditions.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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