Description
MSG-44P 462-8178 Swing Motor Assembly Overview
The MSG-44P 462-8178 Swing Motor manufactured by Tatan is a compact axial piston rotary hydraulic motor belonging to our Excavator Swing Motor Assembly classification. Engineered specifically for Caterpillar 308, 308E2 CR, 308E, and 308D CR 8-ton compact excavators, swapping a worn or internally leaking motor with this complete MSG-44P 462-8178 Swing Motor unit resolves turntable drift, sluggish slewing acceleration, and hydraulic chatter under heavy jobsite cycles.
Constructed strictly to original Kayaba MSG-44P engineering tolerances, this complete unit integrates a 44 cc axial piston cylinder block, precision-lapped bi-metal valve plate, dual anti-shock crossover relief valves, and an internal multi-disc mechanical parking brake. It delivers immediate hydraulic response and mounts directly to the original Cat compact reduction gearbox with zero bracket modifications.
Key Attributes & Parameters for MSG-44P 462-8178 Swing Motor
| Product Category | Swing Motor Assembly | Warranty | 1 Year / 12 Months |
| Specific Motor Model | Kayaba MSG-44P / MSG-44P-21 Slewing Motor | Brand Name | Tatan |
| Compatible Equipment | Caterpillar 308 | 308E2 CR | 308D CR | OEM Part Number | 462-8178 / 284-8255 / 191-4475 |
| Rated Working Pressure | 24.0 – 28.0 MPa (240 – 280 Bar / 4060 PSI) | Braking System | Integrated Multi-Disc Mechanical Brake |
| Crossover Relief Pressure | 24.5 MPa (245 Bar) Pre-Calibrated | Drive Spline Shaft | Standard Involute Spline for Cat 308 Reducer |
| Machinery Test Report | Provided (100% Bench Torque Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Housing Metallurgy | High-Tensile Nodular Cast Iron Body | Place of Origin | Guangdong, China |
| Quality Status | 100% Brand New Swing Motor Unit | Packaging | Export Reinforced Wooden Box Packaging |
Supported Machinery Brands & Swing Motor Coverage
In addition to Caterpillar, Tatan manufactures replacement complete swing motors, rotary groups, and brake valves for leading machinery brands:
Application Scenarios & Buyer Value
When resolving turntable rotation and drift issues with our MSG-44P 462-8178 Swing Motor, workshops and equipment contractors secure measurable operational advantages:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Cat 308 Turret Drift Repair | Installing the MSG-44P 462-8178 Swing Motor restores 100% mechanical holding force immediately, stopping hazardous cab creeping on side inclines under loaded bucket conditions. |
| Compact Excavator Overhaul Centers | Eliminates high-cost trial-and-error rebuilding of scored cylinder blocks, worn brake pistons, and warped valve plates on old core units. |
| Municipal & Utility Contractors | Restores crisp swing acceleration and smooth deceleration without violent hydraulic shudder during rapid pipe and trench backfilling. |
| International Machinery Importers | Pre-tested, export-grade crated replacement units ready for immediate deployment to regional construction jobsites worldwide. |
MSG-44P 462-8178 Swing Motor OEM Diagnostic Guide
Use this technical diagnostic guide to identify slewing circuit and braking faults on your Caterpillar 308 excavator:
| Slewing Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Superstructure drifts or creeps when parked on an incline | Worn mechanical parking brake friction discs or fatigued brake return springs failing to clamp the rotating group when pilot pressure drops. | Replace with a complete factory-tested MSG-44P 462-8178 Swing Motor assembly. |
| 2. Sluggish slewing acceleration or weak rotation breakout torque | High internal oil bypass across scored valve plates and worn piston shoes, dropping motor working pressure below 19.0 MPa. | Inspect pilot control line pressure (3.9 MPa) and replace with a brand new high-torque Tatan swing motor. |
| 3. Violent mechanical shudder or banging noise when stopping swing | Crossover shockless relief valve cartridge jammed with metal contaminants or cracked relief poppet springs under rotational inertia. | Flush motor drain gallery, replace hydraulic return filters, and install a pre-calibrated replacement motor. |
| 4. External hydraulic oil leaking past the motor output shaft seal | Excessive casing backpressure (> 0.20 MPa) blowing out the high-pressure shaft seal due to a restricted or pinched case-drain line. | Check and clear case-drain line restrictions and install a new sealed motor unit with dual lip seals. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan swing motor assembly is preservation-oiled, sealed with steel port plugs, wrapped in heavy waterproof film, and bolted inside an export-grade reinforced wooden crate.
✈️ Express Air Courier
Partnered with DHL, FedEx, UPS, and TNT for 3-7 day express door-to-door delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL ocean container shipping for heavy swing drive assemblies and bulk inventory orders.
📦 Export Wooden Cases
Fumigated solid wooden boxes with custom high-density foam inserts to prevent shipping shock.
Quality Control & International Certificates
Tatan hydraulic and slewing components are manufactured under ISO 9001 certified quality control systems and strictly comply with CE industrial machinery safety directives.
MSG-44P 462-8178 Swing Motor FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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