The application of Virtual Reality (VR) and Augmented Reality (AR) in maintenance activities has significantly transformed traditional approaches by enhancing training, diagnostics, and predictive maintenance. VR enables immersive and risk-free training environments, allowing technicians to practice complex procedures without real-world hazards. Additionally, VR facilitates advanced troubleshooting by providing interactive simulations and real-time assisted guidance. Integrated with IoT sensors, VR contributes to predictive maintenance by visualizing equipment data and identifying potential failures before they occur. Furthermore, remote assistance through VR reduces operational costs and response times by enabling experts to guide on-site technicians virtually. This paper presents a case study on training operators who perform maintenance operations for plastic injection molds. Plastic injection molds consist of hundreds of components, and their maintenance procedures are highly complex. AR offers an assistive learning environment that enhances the training process for operators responsible for mold maintenance by providing real-time, contextual guidance during actual maintenance tasks. This study employs an applied research methodology to evaluate the effectiveness of AR as a support tool for workers performing maintenance operations on plastic injection molds. To support hands-on learning and improve spatial understanding, a 3D-printed assembly of the mold part has been created and integrated to work with the AR application. This combination allows users to interact with a physical replica while receiving step-by-step digital instructions overlaid through AR. The study aims to demonstrate how VR and AR can improve workers’ technical skills, reduce errors, and increase the efficiency of maintenance operations for complex mold systems.