XCMG Crane Height Limit Switch 860331125 (A2B Anti Two Block Switch)
The XCMG Height Limit Switch 860331125, also known as the A2B (Anti Two Block) Switch, is an essential safety component widely used on XCMG truck cranes, all-terrain cranes, and crawler cranes. This switch helps prevent dangerous two-block conditions during lifting operations, improving crane safety and operational reliability.
Designed for heavy-duty lifting environments, the A2B switch is compatible with multiple XCMG crane models and supports stable signal transmission and accurate safety monitoring during crane operation.
The A2B system is commonly integrated with Hirschmann or LMI safety monitoring systems used on modern XCMG cranes.
What Is an A2B Height Limit Switch?
The A2B (Anti Two Block) Height Limit Switch is a crane safety protection device installed near the boom head or hook block area. Its primary function is to prevent the hook block from contacting the boom tip, which could cause severe mechanical damage or safety accidents.
When the hook approaches the preset danger position, the A2B switch automatically sends a warning signal or stops lifting actions through the crane’s LMI system.
Main functions include:
Preventing two-block accidents
Protecting wire ropes and boom structure
Improving lifting safety
Supporting automatic alarm and shutdown systems
Enhancing crane operational reliability
According to industry crane safety applications, A2B switches are critical components for modern truck cranes and crawler cranes.
Compatible XCMG Crane Models
The 860331125 A2B Height Limit Switch is suitable for various XCMG lifting equipment models, including but not limited to:
Truck Cranes
XCMG QY25K
XCMG QY25K-II
XCMG QY30K5
XCMG QY50K
XCMG QY50KA
XCMG QY70K
XCMG QY90K
XCMG QY100K
XCMG XCT30
XCMG XCT50
XCMG XCT80
All Terrain Cranes
XCMG QAY55
XCMG QAY130
XCMG QAY160
XCMG QAY200
Crawler Cranes
XCMG QUY50
XCMG QUY150
XCMG QUY220
XCMG XGC Series
Multiple crane spare parts suppliers confirm that A2B height limit switches are widely used across XCMG crane platforms and lifting systems.
Product Features
High Safety Performance
The A2B switch provides accurate height limitation protection and helps avoid dangerous lifting collisions during crane operation.
Stable Electrical Signal Transmission
Designed for harsh construction environments with reliable signal feedback and stable performance.
Wide Compatibility
Suitable for various XCMG truck cranes, crawler cranes, and all-terrain cranes.
Durable Structure
Made from durable industrial-grade materials resistant to vibration, dust, and outdoor working conditions.
Easy Installation
Direct replacement design for convenient installation and maintenance.
Why Choose KMN- XCMG Crane Spare Parts?
Professional Crane Parts Supplier
We specialize in supplying XCMG crane spare parts for truck cranes, crawler cranes, and all-terrain cranes.
Comprehensive Spare Parts Support
We also provide:
LMI displays
Length angle sensors
Pressure sensors
Hydraulic valves
Slip rings
Circuit boards
Solenoid valves
Wind speed sensors
Steering pumps
Winch reducers
Fast Delivery
Large inventory and fast international shipping support.
Technical Assistance
Professional support for part number confirmation and crane model matching.
