860110711 limit valve for XCMG ZL50G/ZL50GL Wheel Loader

860110711 limit valve for XCMG ZL50G/ZL50GL Wheel Loader Featured Image
  • 860110711 limit valve for XCMG ZL50G/ZL50GL Wheel Loader

Short Description:

Limit Valve 860110711 fits XCMG ZL50G, ZL50GL wheel loaders. It is a hydraulic limit control valve for boom. Installed near the boom cylinder, it limits the maximum lifting height of the boom.

Product Detail

Product Tags

description

This limit valve is a mechanically actuated hydraulic valve. The valve body is made of high-strength cast aluminum with precision spool, return spring and sealing set. The spool is pushed by the boom stopper for position limiting. The trigger stroke is calibrated originally with sensitive and stable limit position. Every valve passes bench trigger test, pressure holding test and durability test before delivery. It keeps consistent limit point after repeated operation, protecting boom, frame and hood from over-travel deformation. It connects with original hydraulic hoses directly without modifying stopper and boom mechanism.

product parameters

Product Name: Limit Valve
Part No.: 860110711
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Valve Body Material: Cast aluminum alloy
Control Type: Mechanical stroke actuation
Function: Boom height limitation, over-travel oil circuit cut-off
Medium: Construction machinery hydraulic oil
Working Temperature: -20℃ ~ +80℃
Inspection Items: Stroke calibration, sealing test, durability trigger test, visual inspection
Installation Method: Bolt mounting
Matching Circuit: Boom working hydraulic circuit

Applicable Scenarios

It is mounted beside the boom cylinder as a protection part to restrict the maximum boom height during shoveling, stacking and unloading, avoiding impact on the hood. Widely used in high-frequency working scenarios such as sand yards, mines, earthwork sites and cargo yards.

advantage

• Original mounting holes and port layout, direct replacement without modification
• Mechanical trigger with quick response, stable limit position after repeated cycles
• Cast aluminum valve body, good vibration resistance for construction site
• Precision spool pair with low internal leakage and good pressure holding
• Reliable built-in return spring for spool reset after releasing
• Stroke calibrated one by one, consistent limit height and good interchangeability
• Safety protection valve, reduce over-travel impact and structural repair cost

FAQ 

Q：What happens if the limit valve fails?
A：The limit function fails, the boom will rise continuously and hit the hood, causing deformation and weld crack. Or it limits too early and leads to insufficient dumping height.

Q：How to troubleshoot early limiting?
A：Check whether the stopper is loose or deformed. If the stopper is normal, the internal parts are worn out, replace the whole valve.

Q：Where does oil leakage usually happen?
A：Most leaks occur at hose ports caused by aged seals. Replace the valve if the valve body itself leaks.

Q：Can I adjust the limit height on the valve?
A：The internal stroke is preset at factory and cannot be adjusted. Adjust the external stopper position to change limit height.

Q：Can limit valves of different part numbers be interchanged?
A：Not recommended. They differ in trigger stroke and port layout, wrong replacement will cause abnormal limit.

Q：What is the daily maintenance for limit valve?
A：Keep the valve clean to prevent dirt jamming the spool. Check stopper regularly and keep hydraulic oil clean to reduce internal wear.

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