XCMG QY20B, QY20K5, QY25K, QY25K-II, QY25K5, QY25K5-I, QY25K5A, QY30K5-I, QY50K, QY70K, QY100K, QY130K, XCT16, XCT35, XCT75, XCT80, XCT100, XCT130, XCT220, XCT8L4, XCT12L4, XCT20L4, XCT25L5, XCT55L5, XCT55L6 truck crane parts, XCMG QUY50, QUY150, QUY220 crawler crane parts.
Control valve assembly 803000079 for XCMG Truck Crane Spare Parts
Control valve assembly 803000079 for XCMG Truck Crane Spare Parts
The Control Valve Assembly 803000079 is a critical hydraulic component designed specifically for XCMG truck cranes. This OEM-spec control valve regulates hydraulic fluid flow, pressure, and direction within the crane's hydraulic system, ensuring precise operation of boom, outrigger, and hoist functions.
Manufactured to meet XCMG's original engineering standards, this control valve assembly delivers reliable performance under demanding construction and lifting conditions. It is a direct-fit replacement part that requires no modification during installation.
Part Number: 803000079
Product Type: Control Valve Assembly
Application: XCMG Truck Crane Hydraulic System
Condition: Brand New Aftermarket / OEM Optional
Warranty: 6–12 Months (depending on supplier)
Country of Origin: China
Working Pressure: 25–35 MPa (typical range for XCMG crane systems)
Rated Flow: 40–100 L/min (varies by crane model)
Operating Temperature: -20°C to +80°C
Hydraulic Fluid Compatibility: Mineral-based hydraulic oil, ISO VG46 or equivalent
Filtration Requirement: NAS 9 or better
Mounting Type: Manifold / Subplate Mounting
Port Connections: Standard SAE or Metric Threads
Valve Type: Directional / Proportional Control Valve
Number of Sections: Multiple (depends on specific crane configuration)
Seal Material: Nitrile Rubber (NBR) / Fluorocarbon (FKM)
Body Material: High-strength cast iron or ductile iron
Spool Material: Hardened alloy steel with precision grinding
Surface Treatment: Anti-corrosion coating
Seals: High-pressure resistant hydraulic seals
This control valve assembly is commonly used in the following XCMG truck crane series:
XCMG QY25K
XCMG QY30K
XCMG QY50K
XCMG QY70K
Other XCMG truck crane models requiring part number 803000079
Note: Always verify your crane's part number and hydraulic system specifications before ordering. Contact our technical team for compatibility confirmation.
Flow Control: Regulates hydraulic oil flow to crane actuators
Pressure Regulation: Maintains safe operating pressure within the system
Directional Control: Directs hydraulic fluid to extend or retract cylinders
Load Holding: Prevents drift in boom and outrigger positions
System Protection: Integrated relief valves prevent overpressure damage
Boom telescope and luffing control
Outrigger extension and retraction
Main and auxiliary winch operation
Slewing and rotation control
Stabilizer leg movement
Verify part number 803000079 matches your crane's requirements
Inspect all ports and connections for damage during shipping
Prepare clean hydraulic fluid and replacement filters
Ensure work area is clean and free of contaminants
Relieve all hydraulic pressure from the system
Disconnect hydraulic lines and label them for reassembly
Remove the old control valve assembly
Clean mounting surface and inspect for wear
Install new control valve assembly with new seals
Reconnect hydraulic lines according to labeled diagram
Refill hydraulic system with recommended fluid
Bleed air from the system
Test all functions at low pressure before full operation
Check for leaks at all connections
Verify smooth operation of all controlled functions
Monitor system pressure and temperature
Perform load test according to crane manufacturer guidelines
Daily: Visual check for leaks and external damage
Weekly: Inspect hydraulic fluid level and quality
Monthly: Check valve mounting bolts and connections
Annually: Perform full hydraulic system inspection
Increased internal leakage
Slow or erratic actuator response
Overheating of hydraulic fluid
External hydraulic leaks
Abnormal noise during operation
Replace the control valve assembly when:
Internal leakage exceeds manufacturer specifications
Spool binding or sticking occurs frequently
External cracks or damage is visible
System performance degrades significantly after adjustment
Manufactured to XCMG OEM specifications
100% pressure tested before shipment
Precision-machined spools for optimal performance
Durable construction for extended service life
Direct replacement — no modification needed
Competitive pricing compared to OEM dealer parts
Fast worldwide shipping available
Technical support for installation and troubleshooting
Bulk order discounts for fleet maintenance
Raw material inspection
Precision machining and assembly
Pressure and flow testing
Leakage testing
Final visual and dimensional inspection
Protective packaging for international shipping
Address:No. 1177, Tuanjie Road, Economic and Development Zone, Qingdao, China.
E-mail: Jack@toprunsparepart.com
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