flux valve for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name: Flow Amplifier Valve
Part No.: None
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Valve Body Material: Cast aluminum alloy
Working Principle: Pilot proportional flow amplification, steering priority control
Rated Working Pressure: Matched with original steering system pressure
Medium: Construction machinery anti-wear hydraulic oil
Working Temperature: -20℃ ~ +80℃
Inspection Items: Flow ratio calibration, relief pressure test, sealing test, neutral unloading test
Matching Parts: Hydraulic steering gear, steering cylinder, steering hose

Applicable Scenarios

It is installed in the steering hydraulic circuit as the core power steering control part. It ensures light and sensitive steering under compound loading work. Widely used in heavy-duty scenarios with frequent steering such as sand yards, mines, earthwork sites and cargo terminals.

• Original port layout and mounting dimension, direct replacement without pipe modification
• Proportional amplification design, light steering wheel operation and linear steering speed
• Built-in steering priority function, no steering delay when working circuit operates together
• Integrated overload relief valve, absorb extreme pressure impact and protect steering parts
• Precision spool pair with low leakage and good neutral unloading, reduce heat generation
• Cast aluminum body, vibration and dust resistant, suitable for harsh construction sites

FAQ 

Q：What steering faults will be caused by failed flow amplifier valve?
A：Common symptoms include stiff steering, slow response, inconsistent left-right steering speed. In serious cases, power steering fails or high pressure bursts hoses.

Q：What to do if steering becomes heavy when boom moves?
A：Check hydraulic oil and steering filter first. If filter is normal, the internal priority spool is worn, replace the whole valve.

Q：Where does oil leakage usually occur?
A：Most leaks appear at port seals due to aged O-rings. If leakage comes from valve casting surface, replace the valve assembly.

Q：Can flow amplifier valve and steering gear be matched arbitrarily?
A：No. Amplification ratio and port specifications must match. Wrong matching will lead to abnormal steering feel.

Q：What causes unstable steering speed?
A：It is usually caused by dirt jamming spool, fatigued spring or air in LS circuit. Bleed air and replace oil before judging valve failure.

Q：What are daily maintenance requirements?
A：Replace steering filter regularly and keep oil clean. Avoid heavy impact and hitting the valve body to prevent spool jam.