Description
Doosan DH55 Swing Motor Assembly Overview
The Doosan DH55 Swing Motor Assembly (OEM Part Numbers: 2274-6001, 2274-6001A, 401-00022, 2270-6001) manufactured by Tatan is a heavy-duty hydraulic rotating device belonging to our Excavator Swing Motor Assembly classification. Designed specifically for Doosan DH55, DH55-V, DH55G, and DX55 5.5-ton mini excavators, replacing your worn swing device with a Tatan complete DH55 swing motor assembly eliminates upper-structure drifting, weak rotation torque, and gear grinding noise instantly.
Built strictly according to original OEM specifications, this complete swing device integrates a high-torque axial piston motor, planetary reduction gear set, and spring-applied hydraulic release parking brake, ensuring 100% direct bolt-on fitment with swing bearing ring gears and hydraulic pilot lines.
Key Attributes & Parameters for Doosan DH55 Swing Motor Assembly
| Product Category | Excavator Swing Motor Assembly | Warranty | 1 Year / 12 Months |
| Specific Motor Model | Doosan DH55 Hydraulic Swing Motor | Brand Name | Tatan |
| Compatible Equipment | Doosan DH55 | DH55-V | DX55 | OEM Part Number | 2274-6001 / 401-00022 |
| Max Working Pressure | 20.6 – 24.5 MPa (206 – 245 bar) | Reduction Ratio | High-Torque Planetary Gear Reduction |
| Parking Brake Type | Hydraulic Released Spring Applied Mechanical Brake | Valves Built-In | Anti-Rebound & Cushion Relief Valves |
| Machinery Test Report | Provided (100% Bench Pressure Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Quality Status | 100% Brand New Assembly | Packaging | Export Wooden Box Packaging |
Supported Machinery Brands & Swing Motor Coverage
In addition to Doosan, Tatan manufactures replacement complete hydraulic swing motors and reduction gearboxes for leading excavator brands:
Application Scenarios & Buyer Value
When upgrading or replacing your mini excavator hydraulic swing system with our Doosan DH55 Swing Motor Assembly, buyers achieve maximum operational precision and rotation stability:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Doosan DH55 Swing Device Replacement | Complete swing motor swap eliminates upper-structure drift on slopes and restores fast swing torque. |
| Hydraulic Repair Workshops | Eliminates tedious brake disc replacement, planetary gear fitting, and seal honing; saves mechanic labor hours. |
| Excavator Parts Distributors & Stockists | High-demand 5.5-ton mini excavator swing motor ready for immediate local resale to plant hire fleets. |
| Rental Fleet Maintenance | Extends mini excavator working lifespan and ensures zero hydraulic swing safety hazards. |
Doosan DH55 Swing Motor Assembly OEM Diagnostic Guide
Use this OEM manual hydraulic diagnostic guide to troubleshoot operational swing motor symptoms on your Doosan DH55:
| Hydraulic/Mechanical Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Upper structure drifting on slope / Swing brake slip | Worn mechanical brake friction discs or internal swing motor piston cylinder oil bypass (>20.6 MPa drop). | Install Tatan new DH55 swing motor assembly; check pilot brake release pressure line. |
| 2. Slow rotating speed & weak swing torque under bucket load | Relief valve pressure spring fatigue, worn bimetallic valve plate, or pilot relief valve contamination. | Flush swing pilot oil lines, adjust relief valve pressure, or swap to a new DH55 complete swing motor. |
| 3. Loud metallic grinding noise in swing gearbox | Planetary gear tooth wear or needle bearing collapse due to insufficient gear oil lubrication. | Replace with Tatan new complete swing motor and gearbox assembly; refill with SAE 80W-90 gear oil. |
| 4. Hydraulic oil leaking into swing bearing ring pit | Damaged lower drive shaft oil seal or blown casing drain seal from high backpressure (>0.2 MPa). | Replace lower shaft seal with high-pressure NOK seal, clear casing drain return line, or install complete assembly. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan Doosan DH55 hydraulic swing motor undergoes anti-rust oiling, waterproof plastic sealing, and solid export wooden box packaging.
✈️ Express Air Courier
Partnered with DHL, FedEx, UPS, and TNT for express door-to-door delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL ocean container shipping for heavy swing motors and bulk orders.
📦 Export Wooden Cases
Fumigated solid wooden boxes with thick shockproof foam lining for maximum safety.
Quality Control & International Certificates
Tatan hydraulic swing motors are manufactured under ISO 9001 quality management systems and strictly comply with CE safety standards.
Doosan DH55 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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