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Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Specifications
Supply Ability :
300 Sets / Month
Packaging Details :
Dimension: L60×W60×H60 cm
Delivery Time :
3-8 days
Model Number :
ZAX330-3G ZAX350-3G ZAX360-3G
Transportation Method :
DHL, UPS, FedEx, Sea Freight
Price :
Negotiable
Applicable Mode :
ZAX330-3G ZAX350-3G ZAX360-3G
Part No :
9214478 4433970
Place of Origin :
China
Condition :
New / Rebuilt
Payment Terms :
Western Union, T/T
MOQ :
1 Set
Brand Name :
CAVOYD
Warranty :
6Months
MOQ :
1 set
Product Name :
Travel Motor Assembly / Final Drive Assembly
Description
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Installation & Verification Guidelines
  • Verify Hitachi part number and confirm main control valve assembly compatibility, including boom, arm, bucket, travel, swing spools, relief valves, and holding valves
  • New or remanufactured valves must include hydraulic bench test reports for pressure, flow, and internal leakage of each section
  • For remanufactured valves, confirm spools are honed, repaired, or new. Replace all O-rings
  • Inspect valve block for casting cracks and sand holes upon arrival. Seal oil ports to prevent dirt and contaminants from entering valve cavity
  • Secure valve firmly during transportation to avoid impact damage to valve block, port threads, and precision spools
  • Clean hydraulic tank and pipelines before installation, replace all hydraulic filters, and fully bleed air from hydraulic system
  • Test compound movements, cylinder drift, and system relief pressure after installation. Check for jerky operation, abnormal noise, and oil seepage
Common Faults & Symptoms
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

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

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

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

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

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 / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
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Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970

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Product Detail
Supply Ability :
300 Sets / Month
Packaging Details :
Dimension: L60×W60×H60 cm
Delivery Time :
3-8 days
Model Number :
ZAX330-3G ZAX350-3G ZAX360-3G
Transportation Method :
DHL, UPS, FedEx, Sea Freight
Price :
Negotiable
Contact Supplier
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970
Main Control Valve / Distributor for Hitachi ZAX330-3G ZAX350-3G ZAX360-3G Direct Injection Excavator Part No 9214478 4433970

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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