Reliable Hydraulic Solution: 702-21-57400 and 7022157400 Control Valve
When your machinery faces pressure instability or slow hydraulic response, the 702-21-57400 (also searched as 7022157400) is the critical component for restoring peak performance. As a professional supplier of heavy equipment parts, we offer this relief valve as a direct replacement for PC200-7, PC200-8, and PC220-8 models, ensuring your hydraulic system operates within the specified safety parameters.
Our focus is on providing procurement-ready solutions for repair shops and fleet managers who prioritize durability and precision over generic alternatives.
Product Specifications and Delivery Data
| Field | Details |
|---|
| Model NO. | PC200-7, PC200-8, PC210-8, PC220-7, PC220-8 |
| Part Number | 702-21-57400 / 7022157400 |
| Product Name | Main Relief Valve / Control Valve Component |
| Condition | Brand New, OEM Standard Replacement |
| Type | Hydraulic System Parts |
| MOQ | 1 Piece |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | Express (DHL, Fedex, EMS, UPS), Air, or Sea Freight |
| Stock Status | In Stock / Fast Dispatch within 24-48 Hours |
| Application | Engine maintenance, hydraulic system overhaul |
Why This Part Matters for Your Equipment
The 702-21-57400 valve controls the maximum pressure in the hydraulic circuit. A failing valve can lead to overheating, pump damage, or sudden loss of lifting power. Our OEM-standard replacements are tested for extreme pressure environments.
6 Core Procurement Advantages Comparison| Feature | Our 702-21-57400 Replacement | Cheap Market Alternatives |
|---|
| Material Quality | High-grade alloy steel with anti-wear coating | Standard recycled steel |
| Precision | Micron-level tolerance for exact pressure seating | Loose tolerances leading to leaks |
| Testing | 100% Factory hydraulic pressure tested | Random or no testing |
| Service Life | Designed for 5000+ operational hours | Frequent failure within 6 months |
| Installation | Plug-and-play, fits PC200-7 perfectly | Requires adjustment or modification |
| Warranty | Comprehensive quality assurance provided | No after-sales support |
Not sure how this issue affects your equipment?
Our team helps operators achieve maximum uptime through professional technical support:
Identify potential risks during maintenance cycles
Recommend suitable replacement parts if needed based on serial numbers
Support both inspection advice and reliable parts supply
Connect with our technical desk via WhatsApp: +8613532379052
Troubleshooting & FAQ for 702-21-57400
Q1: Why is my PC200-8 excavator showing weak hydraulic power?
A: Weakness is often caused by a worn 702-21-57400 main relief valve allowing pressure to bypass the cylinders. Inspect the valve seat for debris or scoring. Replacing the unit usually restores full breakout force.
Q2: Is the 7022157400 compatible with older PC200-6 models?
A: No, this specific part number is optimized for the Dash 7 and Dash 8 series. Using the incorrect valve can cause system instability. Always verify your machine serial number before purchase.
Q3: Why Choose This Main Relief Valve?
A: Our version features an OEM-standard tri-metal structure for superior heat resistance. It is trusted by repair shops and equipment fleets worldwide for its reliability in demanding construction environments.
Submit Your Inquiry for 702-21-57400
About Our Company and Core Supply Range:
We specialize in complete engine assemblies and premium components for global brands including Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai. Our warehouse stocks essential parts for engine rebuilds and routine maintenance.
Our long-tail keyword coverage includes: Heavy duty cylinder liner kits, Piston assembly for excavators, High-strength piston rings, Crankshaft main bearings, Connecting rod bearing sets, Thrust washer replacements, Engine overhaul gasket kits, Diesel fuel injection pumps, Precision fuel injectors, Forged steel crankshafts, Turbocharger upgrades, Industrial water pumps, High-pressure oil pumps, Engine cylinder blocks, Cast iron cylinder heads, Robust connecting rods, Hydraulic pump repair parts, Final drive seal kits, Swing motor components, and undercarriage replacement parts.
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