Description
Doosan DH55 Travel Motor Final Drive Assembly Overview
The Doosan DH55 Travel Motor Final Drive Assembly (OEM Part Numbers: 2270-9007, 2270-9007A, 401-00020, 170303-00018) manufactured by Tatan is a heavy-duty hydraulic travel device belonging to our Excavator Final Drive Travel Motor classification. Designed specifically for Doosan DH55, DH55-V, DH55G, and DX55 5.5-ton mini excavators, replacing your worn travel motor with a Tatan complete DH55 final drive assembly eliminates tracking off-steer, travel weakness, and gear oil leakage instantly.
Built strictly according to original OEM specifications, this complete travel motor assembly integrates a 2-speed axial piston hydraulic motor, planetary gear reduction gearbox, and Duo-Cone mechanical floating seals, ensuring 100% direct bolt-on fitment with track frame sprockets and travel pilot lines.
Key Attributes & Parameters for Doosan DH55 Travel Motor Final Drive Assembly
| Product Category | Excavator Final Drive Travel Motor | Warranty | 1 Year / 12 Months |
| Specific Motor Model | Doosan DH55 Hydraulic Travel Device | Brand Name | Tatan |
| Compatible Equipment | Doosan DH55 | DH55-V | DX55 | OEM Part Number | 2270-9007 / 401-00020 |
| Max Relief Pressure | 24.5 – 28.0 MPa (245 – 280 bar) | Reduction Ratio | High-Torque 2-Speed Planetary Gearbox (~36:1) |
| Floating Seal Type | Forged Duo-Cone Mechanical Floating Seals | Speed Shift | Hydraulic 2-Speed Shift (High / Low) |
| 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 & Final Drive Coverage
In addition to Doosan, Tatan manufactures replacement complete hydraulic travel motors and final drive gearboxes for leading excavator brands:
Application Scenarios & Buyer Value
When upgrading or replacing your mini excavator undercarriage travel system with our Doosan DH55 Travel Motor Final Drive Assembly, buyers achieve maximum operational performance and tracking stability:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Doosan DH55 Travel Motor Replacement | Complete final drive swap eliminates off-tracking and restores equal 2-speed travel speed on muddy terrain. |
| Undercarriage Repair Workshops | Eliminates tedious planetary gear fitting, floating seal lapping, and pressure testing; saves mechanic labor hours. |
| Excavator Parts Distributors & Stockists | High-demand 5.5-ton mini excavator travel motor ready for immediate local resale to plant hire fleets. |
| Rental Fleet Maintenance | Extends mini excavator working lifespan and restores full track driving torque under heavy loads. |
Doosan DH55 Travel Motor Final Drive Assembly OEM Diagnostic Guide
Use this OEM manual hydraulic diagnostic guide to troubleshoot operational travel motor symptoms on your Doosan DH55:
| Hydraulic/Mechanical Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Excavator tracking off-steer / One side travel slow | Worn motor piston cylinder block or swashplate surface scoring causing internal oil bypass under 24.5 MPa load. | Install Tatan new DH55 travel motor assembly; inspect center swivel joint seals. |
| 2. Gear oil leaking into track sprocket hub | Duo-Cone mechanical floating seal face damage or rubber O-ring degradation allowing gear oil leak. | Replace complete final drive assembly or install high-durability forged steel Duo-Cone floating seal kit. |
| 3. Loud metallic grinding noise during travel | Planetary gear tooth wear or needle bearing collapse due to insufficient gear oil lubrication. | Replace with Tatan new complete travel motor and gearbox assembly; refill with SAE 80W-90 gear oil. |
| 4. High-speed (Rabbit speed) shift failure | 2-speed shift pilot control spool sticking or pilot line pressure drop (<2.5 MPa) to swashplate piston. | Clean 2-speed control valve spool, check pilot shift pressure, or replace complete travel motor assembly. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan Doosan DH55 hydraulic travel 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 travel 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 travel motors are manufactured under ISO 9001 quality management systems and strictly comply with CE safety standards.
Doosan DH55 Travel Motor FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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