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Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Specifications
Supply Ability :
300 Sets / Month
Payment Terms :
Western Union, T/T
Delivery Time :
3-8 Working Days
Warranty :
6Months
Model Number :
EC250D EC300D EC350D
Place of Origin :
China
Price :
Negotiable
Packaging Details :
Wooden Case / Carton with Foam Protection, or as Required
MOQ :
1 Set
Applicable Mode :
EC250D EC300D EC350D
Transportation Method :
DHL, UPS, FedEx, Sea Freight
Brand Name :
CAVOYD
Part No :
14702863 14720610
MOQ :
1 set
Condition :
New / Rebuilt
Description
Main Control Valve Multi-way Distributor for EC250D EC300D EC350D Excavator
Installation & Verification Guidelines
  1. Verify VOE part number and confirm main control valve assembly compatibility, including boom, arm, bucket, travel, swing spools, relief valves, and holding valves.
  2. New or remanufactured valves must include hydraulic bench test reports for pressure, flow, and internal leakage of each section.
  3. For remanufactured valves, confirm spools are honed, repaired, or new. Replace all O-rings
  4. Inspect valve block for casting cracks and sand holes upon arrival. Seal oil ports to prevent dirt and contaminants from entering valve cavity.
  5. Secure valve firmly during transportation to avoid impact damage to valve block, port threads, and precision spools.
  6. Clean hydraulic tank and pipelines before installation, replace all hydraulic filters, and fully bleed air from hydraulic system.
  7. Test compound movements, cylinder drift, and system relief pressure after installation. Check for jerky operation, abnormal noise, and oil seepage.
Common Faults & Symptoms
  1. Spool and Valve Bore Wear, Large Internal Leakage
    • Symptoms: Weak digging power; performance worsens when hot; boom/arm cylinder sinks
    • Cause: Dirty hydraulic oil scratches spool and valve bore
  2. Spool Stuck, Slow or Jerky Movement
    • Symptoms: Slow boom, arm, bucket and swing action; compound operation poor
    • Cause: Oil contamination, oil sludge, damaged return spring
  3. Relief Valve and Pressure Compensator Failure, Insufficient System Pressure
    • Symptoms: Low working pressure, pressure fluctuation, whistling noise
    • Cause: Worn valve core, spring fatigue, clogged damping hole
  4. O-ring Damage, External Oil Leakage
    • Symptoms: Oil seepage between valve slices and end covers
    • Cause: Aged sealing rings, loose bolts, air suction causing cavitation
  5. Holding Valve Seal Failure, Cylinder Drift
    • Symptoms: Boom and arm sink slowly, worse under heavy load
    • Cause: Contamination or wear on holding valve sealing surface
  6. Valve Block Cracking (Rare but Serious)
    • Symptoms: Sudden heavy oil leakage, unable to build hydraulic pressure
    • Cause: Long-term pressure impact, uneven bolt tightening torque, casting defects
Product Images
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610 Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
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Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610

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Product Detail
Supply Ability :
300 Sets / Month
Payment Terms :
Western Union, T/T
Delivery Time :
3-8 Working Days
Warranty :
6Months
Model Number :
EC250D EC300D EC350D
Place of Origin :
China
Contact Supplier
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610
Main Control Valve Multi-way Distributor of EC250D EC300D EC350D Excavator 14702863 14720610

Guangzhou Kawo Construction Machinery Co.,Ltd.

Verified Supplier
1 Years
guangdong, guangzhou
Since 2017
Business Type :
Trading Company, Manufacturer
Main Products :
Construction Hydraulic Pump, Excavator Hydraulic Pump, Hydraulic Control Valve
Total Annual :
$1 Million -US$5 Million
Employee Number :
80~100
Certification Level :
Verified Supplier
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