XCMG Crane A2B Anti-Two-Block Limit Switch
The A2B switch is small, but the protection it supports is critical. It detects an approaching hook block and helps warn or stop unsafe upward movement when the system is correctly installed.
What buyers usually want to confirm: Does the contact logic match, is the cable long enough, and will the switch work with the existing weight and LMI?
Fitment Evidence That Saves Time
Normally-open/closed contact logic
Connector and cable length
Switch body and mounting holes
A2B weight and chain arrangement
Crane LMI/controller configuration
When This Part Becomes Relevant
Replace after confirmed sticking, broken housing, water ingress or failed contacts. Damaged cable, missing weight, incorrect adjustment or controller wiring can create the same alarm.
A Practical Workshop View
Secure the hook and boom, install the switch and weight in the documented position, then test alarm and motion cut-off at safe height. Never bypass the circuit.
Related XCMG Crane Parts
ICP6600 Display for XCMG XCT Cranes · XCMG Crane CAN Communication Board
Questions Buyers Ask
Can the crane work with A2B bypassed?
Bypassing a safety device is unsafe and unacceptable.
Why is the alarm always active?
Check switch logic, cable, weight and adjustment.
What must be tested?
Warning and every applicable limiting response.
Export Packing and Enquiry
The switch, cable and mounting hardware are separated and moisture-protected. For faster confirmation, send the machine plate, old-part label, installation photos and destination country.
