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Main Control Valve Distributor for CAT E320C E320D E323D E324D E329D E330C Excavator 259-7756 1907700 259-7464

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Main Control Valve Distributor for CAT E320C E320D E323D E324D E329D E330C Excavator 259-7756 1907700 259-7464

Packaging Details : Dimension: L80×W40×H40 cm

Condition : New / Rebuilt

Supply Ability : 300 Sets / Month

Delivery Time : 3-8 days

Model Number : E320C E320D E323D E324D E329D E330C

MOQ : 1 Set

Product Name : Travel Motor Assembly / Final Drive Assembly

Price : Negotiable

Transportation Method : DHL, UPS, FedEx, Sea Freight

Place of Origin : China

Part No : 259-7756 1907700 259-7464

Warranty : 6Months

Brand Name : CAVOYD

MOQ : 1 set

Applicable Mode : E320C E320D E323D E324D E329D E330C

Payment Terms : Western Union, T/T

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Main Control Valve Distributor for CAT E320C E320D E323D E324D E329D E330C Excavator 259-7756 1907700 259-7464

Installation & Verification Guidelines

Verify CAT 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 CAT E320C E320D E323D E324D E329D E330C Excavator 259-7756 1907700 259-7464

Product Tags:

259-7756 main control valve

259-7756

CAT E320C Main Control Valve

Main Control Valve Distributor for CAT E320C E320D E323D E324D E329D E330C Excavator 259-7756 1907700 259-7464 Images

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