Are you experiencing hydraulic pressure loss or sluggish movement in your DX300LC excavator? Restoring system integrity starts with high-quality hydraulic components. We provide the 400504-00218 (also identified as 40050400218) Main Relief Valve, engineered to meet or exceed OEM standards for Doosan heavy machinery.
Connect with our technical team for immediate quotes and compatibility verification.
Follow Our Facebook for Tech Updates WhatsApp: +86 135 3237 9052 Email: [email protected]| Attribute | Product Details |
|---|---|
| Part Number | 400504-00218 / 40050400218 |
| Product Name | Main Relief Valve / Hydraulic Control Valve |
| Compatible Machine | Doosan DX300LC, DX300LC-3, DX340LC, DX350LC Excavators |
| Condition | Brand New, OEM Standard Replacement |
| Stock Status | In Stock / Fast Dispatch within 24 Hours |
| MOQ | 1 Piece |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | DHL, Fedex, EMS, UPS, Air Freight, Sea Freight |
| Application | Hydraulic system pressure regulation, maintenance, and overhaul |
| Selection Criteria | Standard Aftermarket Parts | Our OEM Standard Replacement |
|---|---|---|
| Material Durability | Generic Carbon Steel | High-Strength Alloy with Precision Hardening |
| Pressure Stability | Fluctuating levels | Consistent 350-380 bar regulation |
| Internal Sealing | Low-grade rubber seals | High-temperature resistant HNBR/Viton Seals |
| Fitment Accuracy | May require modification | 100% Bolt-on Ready for DX300LC |
| Service Life | Short-term (3-6 months) | Extended Performance for Heavy-Duty Work |
| Tech Support | None / Sales Only | Fault Diagnosis & Installation Support |
1. Why is my Doosan DX300LC losing lifting power?
A faulty 400504-00218 relief valve often causes internal leaks, preventing the pump from reaching maximum working pressure. If your boom or arm feels weak, inspecting the main relief valve is the first step in maintenance.
2. How to identify a failing 40050400218 valve?
Common symptoms include excessive hydraulic noise, overheating of the hydraulic oil, and inconsistent cycle times. Replacing the valve prevents further damage to the main pump and control valves.
3. Can I adjust the pressure on this valve myself?
While adjustable, we recommend using a calibrated pressure gauge to match Doosan factory settings. Our valves come pre-set to OEM specifications for immediate installation.
Answer: Our units utilize an OEM-standard tri-metal structure for superior wear resistance. Trusted by repair shops and equipment fleets worldwide, they ensure your machinery maintains peak breakout force in tough construction environments.
Our team helps operators achieve maximum uptime:
Identify potential risks during hydraulic maintenance cycles
Recommend suitable replacement parts if needed based on serial numbers
Support both inspection advice and professional parts supply
Fill out the details below and our team will check global stock for your specific requirement.
We specialize in heavy-duty engine assemblies and precision spare parts for global brands. Our core inventory includes complete engines and components for Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai. Whether you are performing a full engine rebuild or routine maintenance, we provide the essential parts needed for a successful overhaul.
Main Engine Parts: Cylinder Liner, Piston, Piston Ring, Main Bearing, Con Rod Bearing, Thrust Washer, Overhaul Gasket Kit, Fuel Injection Pump, Injector, Crankshaft, Turbocharger, Water Pump, Oil Pump, Cylinder Block, Cylinder Head, Connecting Rod.
Industry Long-tail Keywords: Doosan excavator spare parts, Cummins 6CT engine rebuild kit, Komatsu PC300 hydraulic pump parts, Caterpillar C7 engine overhaul, Isuzu 4HK1 cylinder head replacement, Kubota V2403 piston ring set, Yanmar 4TNE98 water pump supplier, Weichai WD615 engine gasket, excavator main relief valve diagnosis, heavy equipment hydraulic seal kits, diesel fuel injector calibration, turbocharger replacement for construction machinery, crankshaft grinding specifications, cylinder liner installation guide, oil pump pressure testing, con rod bearing clearance, excavator maintenance parts wholesale, global shipping heavy machinery parts, OEM quality engine bearings, excavator hydraulic system troubleshooting.
Click the button below to visit our Facebook profile and stay updated with the latest news and updates!
Visit Facebook Profile
English
English