XCMG Two-Way Hydraulic Lock Valve 803000435
XCMG 803000435 is a two-way hydraulic lock valve for compatible crane load-holding circuits. It helps hold actuator position until pilot pressure releases the valve; port and pilot configuration must match.
Identification and Matching
Part number 803000435
Work, cylinder and pilot port markings
Thread sizes and block mounting
Flow direction and pilot ratio
Installed cylinder and circuit position
Application and Service Scenarios
Investigate after verified cylinder drift, failure to unlock, chatter or external leakage. Cylinder seals, hoses, control valve leakage, trapped pressure and pilot supply can create similar symptoms.
Inspection and Installation
Secure the supported structure, release pressure and keep ports clean. Connect each marked port correctly, bleed trapped air and test controlled movement plus holding performance before loading.
Frequently Asked Questions
Does cylinder drift always mean the lock valve failed?
No. Cylinder bypass and control-valve leakage must be checked.
Can port positions be guessed?
No. Use port markings and the hydraulic diagram.
Must holding be tested?
Yes under the approved controlled procedure.
Export Packing
Ports are capped and the valve block is protected against contamination and impact.
