A system predicts needed maintenance for an irrigation system that includes a portion of the irrigation system and a movable end gun operably associated with the portion of the irrigation system. The predictive maintenance system includes a controller and one or more sensors configured to couple to the movable end gun and configured to electrically communicate with the controller. The one or more sensors are configured to generate an electrical signal indicative of movement and/or positioning of the movable end gun relative to the portion of the irrigation system over time. The controller is configured to receive the electrical signal and determine whether the movable end gun, or one or more components thereof, requires maintenance based on the electrical signal. The signal indicative of abnormal operation includes an indication of movement and/or positioning relative to the portion of the irrigation system over a period of time.