Abstract: An on-board apparatus, system, and method for weighing loads lifted by a lifting apparatus mounted to a vehicle, based upon torque generated on a torque tube. More particularly, the invention is directed toward the mounting of a loadcell in relation to a torque tube of a lifting apparatus mounted on a vehicle, so that the weight of a load lifted by the apparatus can be determined by generating electric signals corresponding and calibrated to the amount of load lifted by the apparatus. In further detail, the apparatus, method, and system of the present invention are provided for on-board weighing of loads collected by refuse vehicles or bulk material haulers. The invention envisions operating to weigh loads statically or dynamically while the load is in motion.