Abstract: A construction vehicle has a rear bumper assembly mounted on a frame thereof. The bumper assembly comprises a horizontally disposed bottom plate and a plurality of upstanding plates which define a closed compartment having a counterweight disposed therein. The counterweight is attached to the bottom plate by a spacer which extends through the center of gravity of the counterweight and by a pair of bolts attached to opposite ends of the spacer. The counterweight is assembled by attaching a lifting eye to the spacer, lowering and simultaneously centering the counterweight in the compartment, replacing the lifting eye with one of the above-mentioned bolts and attaching the other bolt to the spacer.