TM 9-2350-256-20c. OPERATIONClear all personnel from top and rear areas of vehicle before raising or lowering the boom.Under no circumstances should any hydraulic hoses/lines be disconnected for maintenancepurposes unless the boom is in the fully forward position or blocked by boom safety stands.To avoid possibility of injury to personnel, if the hoisting boom cannot be fully raised (roof ofbuilding too low, etc.), the use of safety boom stands is mandatory. After maintenance isperformed and the boom is to be lowered to the stowed position, clear all personnel from the topand rear area of the vehicle.CAUTIONAlways raise the hoisting boom assembly to the fully forward position unless it is not permissibledue to an obstruction.Be sure AUXILIARY GENERATOR switch on slaving vehicle is in the OFF position.Ensure APU emergency winch operation valve is in the normal operation mode on the inoperablevehicle.NOTEThe operation (RAISE/LOWER) of the hoisting boom assembly will be completed by using only thecontrols in the inoperable vehicle, which is being hydraulically driven by the APU of the slavingvehicle.1Start APU on slaving vehicle (refer to TM 9-2350-256-10).2Shift SYSTEM SELECTOR control lever to auxiliary position and operate hoisting boom controls ininoperable vehicle (refer to TM 9-2350-256-10).Change 13-14.9
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