Product Overview
The KYB MSG-44P-21-13 is a high-torque hydraulic swing motor engineered by KYB (Kayaba Industry Co., Ltd.), a globally recognized manufacturer of precision hydraulic components for mobile and industrial machinery. This unit operates on the fixed-displacement axial piston principle, converting hydraulic pressure and flow into controlled rotary output torque for slewing and swing functions. Integrated within the motor housing is a spring-applied, hydraulically-released multi-disc parking brake, along with built-in relief and make-up valve circuitry that protects the swing circuit from shock pressures and cavitation during deceleration. The MSG-44P-21-13 is purpose-built for the swing axis of compact excavators and similar slewing equipment, delivering smooth acceleration, precise load holding, and reliable bidirectional rotation in demanding duty cycles.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Swing Motor (Axial Piston, Fixed Displacement) |
| Model Designation | MSG-44P-21-13 |
| Manufacturer | KYB (Kayaba Industry Co., Ltd.) |
| Operating Pressure | Standard Industrial Grade (up to rated working pressure; peak pressure limited by integrated relief settings) |
| Displacement | Fixed displacement, compact-frame swing duty rating |
| Brake Type | Integrated spring-applied, hydraulically-released multi-disc parking brake |
| Valve Integration | Built-in relief valve and make-up (anti-cavitation) valve block |
| Mounting & Connection | Standard ISO / Manufacturer Interface (flange or splined shaft mounting per OEM swing gearbox) |
| Rotation | Bidirectional (clockwise / counterclockwise) |
Engineering Features & Advantages
- Precision Performance: Axial piston rotating group delivers high starting and running torque with smooth, controllable swing acceleration and minimal speed fluctuation under varying load.
- Integrated Safety Braking: The spring-applied, hydraulically-released multi-disc brake automatically locks the swing axis on loss of pilot pressure, ensuring safe load holding on slopes and during transport.
- Shock & Cavitation Protection: Internal relief and make-up valve circuitry absorbs pressure spikes during swing deceleration and prevents void formation, extending motor and circuit life.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, including high cycle rates, vibration, and temperature extremes common to mobile hydraulic equipment.
- Direct Fit Replacement: Precision-manufactured to original KYB specifications for direct replacement, minimising downtime and eliminating fitment issues.
Typical Industrial Applications
The KYB MSG-44P-21-13 is a high-torque hydraulic swing motor engineered by KYB (Kayaba Industry Co., Ltd.), a globally recognized manufacturer of precision hydraulic components for mobile and industrial machinery.
PRODUCT IMAGES
KYB MSG-44P-21-13 Hydraulic Swing Motor
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
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