Anti-Two Block switch for Grove RT-745

The Anti-Two Block switch, part number 9333102228, serves as a critical safety component in crane operations. Its primary function is to detect the proximity of the hook block to the boom head or boom nose. When the switch detects this condition, it triggers an alarm and initiates the automatic lockout of hoist and boom extension functions to prevent a two-block event, which could otherwise lead to structural damage or load instability.

This unit is specifically engineered for the Grove RT-745 rough-terrain crane, particularly for units identified by serial numbers 477 and 547. The device features an internal switching mechanism that activates when a counterweight or tensioned cable pulls on the lever arm, signaling the crane control system to halt movement.

Anti-Two Block systems are integrated into the crane's safety circuitry to prevent contact between the load block and the boom tip. By monitoring the distance between these components, the switch ensures that lifting operations remain within safe operational limits, protecting both the equipment structure and the integrity of the hoist cables during standard lifting cycles.