Description
Doosan DH55 Main Control Valve Assembly Overview
The Doosan DH55 Main Control Valve Assembly (OEM Part Numbers: 2302-9277B, 00070-33171, 0007033171, 401-00021) manufactured by Tatan is a precision-engineered hydraulic distribution valve belonging to our Main Control Valve Assembly classification. Designed specifically for Doosan DH55, DH55-V, DH55G, and DX55 5.5-ton mini excavators, replacing your worn hydraulic valve with a Tatan complete DH55 main control valve assembly eliminates hydraulic function hesitation, cylinder drift, and internal oil leakage instantly.
Built strictly according to original OEM specifications, this hydraulic control valve features micro-lapped alloy steel spools and cast-iron housing, ensuring 100% direct bolt-on fitment with pilot control lines and main hydraulic pump hoses.
Key Attributes & Parameters for Doosan DH55 Main Control Valve Assembly
| Product Category | Main Control Valve Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Doosan DH55 Main Control Valve | Brand Name | Tatan |
| Compatible Equipment | Doosan DH55 | DH55-V | DX55 | OEM Part Number | 2302-9277B / 00070-33171 |
| Max Relief Pressure | 24.5 – 28.0 MPa (245 – 280 bar) | Max Oil Flow Rate | 60 – 80 L/min |
| Control Type | Hydraulic Pilot Control / Mechanical Spool | Valve Material | High-Density Ductile Iron Body |
| 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 & Control Valve Coverage
In addition to Doosan, Tatan manufactures replacement main control valves and hydraulic components for leading excavator brands:
Application Scenarios & Buyer Value
When upgrading or replacing your mini excavator hydraulic system with our Doosan DH55 Main Control Valve Assembly, buyers achieve maximum operational precision and speed:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Doosan DH55 Control Valve Replacement | Complete valve assembly replacement eliminates boom drift and restores multi-function compound movement. |
| Hydraulic Repair Workshops | Eliminates tedious spool polishing and valve body re-machining; saves mechanic labor hours. |
| Excavator Parts Distributors & Stockists | High-demand 5.5-ton mini excavator control valve ready for immediate local resale to contractors. |
| Rental Fleet Maintenance | Extends mini excavator working lifespan and restores factory hydraulic pressure response. |
Doosan DH55 Main Control Valve Assembly OEM Diagnostic Guide
Use this OEM manual hydraulic diagnostic guide to troubleshoot operational control valve symptoms on your Doosan DH55:
| Hydraulic Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Slow boom/arm speed & cylinder drifting down | Main relief valve pressure drop below 24.5 MPa or internal spool wear allowing oil bypass to return tank. | Install Tatan new DH55 main control valve assembly; flush hydraulic system & replace oil filter. |
| 2. Jerky or delayed lever response when operating travel/swing | Pilot control spool sticking, clogged pilot line filter, or pilot signal pressure leak (<3.9 MPa). | Clean pilot lines, inspect pilot pressure, or replace complete DH55 hydraulic distribution valve. |
| 3. Hydraulic oil overheating rapidly during excavation | Internal valve spool bypass generating excessive friction heat or stuck overload port relief valve. | Calibrate main relief pressure or swap to a Tatan factory pre-tested DH55 main control valve. |
| 4. External hydraulic oil leaking between valve sections | Sectional seal O-ring degradation or cracked valve body from high hydraulic shock pressure spikes. | Replace with Tatan high-density ductile iron main control valve assembly with reinforced seals. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan Doosan DH55 main control valve assembly 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 control valves and bulk orders.
📦 Export Wooden Cases
Fumigated solid wooden boxes with thick shockproof foam lining for maximum safety.
Quality Control & International Certificates
Tatan hydraulic control valves are manufactured under ISO 9001 quality management systems and strictly comply with CE safety standards.
Doosan DH55 Control Valve FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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