Anti-Two Block switch with locking pin and lanyard for Grove

The Anti-Two Block switch assembly, part number 9333101609, acts as a safety sensor within the crane's load monitoring system. It is designed to detect the proximity of the hook block to the boom head, preventing the two-blocking condition where the block strikes the boom point. The assembly includes a locking pin and a lanyard to maintain the switch in its correct operational position, ensuring the system remains active during lifting tasks. When the hook block reaches a pre-determined limit, the switch triggers a signal to the crane control system to halt hoist or extension movements.

This component is compatible with Grove mobile and all-terrain crane models. It is essential to maintain the integrity of the switch, pin, and lanyard to ensure the safety system functions as intended. Regular inspection of this assembly is required to confirm that the mechanical linkage is secure and that the electrical signal is transmitted correctly to the crane's load moment indicator or control unit.

Anti-Two Block systems are standard safety features on modern cranes. The switch functions by providing a physical break or contact signal that the crane's computer interprets to prevent dangerous over-hoisting. By monitoring the position of the hook block relative to the boom tip, this type of switch protects the crane structure and rigging from damage caused by accidental contact.