A telescopic material conveyer apparatus has a main boom assembly reinforced by a steel saddle frame connected to a turn table and a lift mechanism, an extension boom assembly adapted by two or more roller assemblies and connecting hardware to travel mechanically within the main boom assembly and to extend therefrom, one or more connected drive motors, a conveyer belt supported by frame architecture and a pulley and drive chain system, at least one hydraulic motor having operative connection to the turntable, lift mechanism and to a belt drive drum, at least one hydraulic valve connected inline in the hydraulic line controlling the belt drive motor, the valve electronically operable via input received from a load sensor integrated within or to the lift mechanism, a programmable load threshold determining open and close operation states of the valve and directing run and stop state operations of the conveyer belt.