A side mounted storage device is provided for an agricultural applicator having a frame assembly in support of a drive unit or engine configured to drive the agricultural applicator on a plurality of wheel assemblies in a forward direction of travel. The storage device includes a fixed storage compartment and a pivotal storage compartment. The pivotal storage compartment is pivotally attached at the forward end of the fixed storage compartment with respect to the forward direction of travel of the agricultural applicator. From a closed position, the pivotal storage compartment is coupled to swing in a radially outward direction with respect to the frame assembly of the agricultural applicator. In a preferred embodiment, the pivotal storage compartment in the open position provides an operator on the ground with ready access to the engine.