TM 5-3810-306-10PAT/LMI SYSTEMWARNINGThe LMI is an operational aid only.The device is not, and shall not be, a substitutefor good operator judgement, experience anduse of accepted safe crane operatingprocedures.The responsibility for the safe operation of thecrane shall remain with the crane operator whoshall ensure that all warnings and instructionssupplied are fully understood and observed.Prior to operating the crane, the operator mustcarefully and thoroughly read and understandtheinformation in this manual to ensure that he knows the operation and limitations of the indicator and crane.The PAT/LMI (Load Moment Indicator) System is anelectro-mechanical sensing and alarm system thatprovides vital lift data to the operator. The systemsenses current boom length, boom angle, and degree ofrotation as well as load boom weight. This data isdisplayed on a control panel mounted above theinstrument panel in the cab. When an impendingoverload condition is sensed, the system provides theoperator with visual and audible warnings. It locks outthe control levers to prevent lowering the boom,extending the boom or raising the main/auxiliary hoistcables. Antitwo-block devices prevent the hook blockfrom coming into contact with the boom nose. Thiscondition will also cause a lockout of the abovementioned control functions.1-12
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