Preventive maintenance (PM) of equipment is a crucial aspect of effective manufacturing systems, as inadequate PM can lead to various negative issues, such as quality, productivity cost, customer cost, and maintenance costs. This paper presents a case study approach using the Analytic Hierarchy Process (AHP) and ranking of critical elements for the PM equipment of a 3D Atomic IV printer machine at The Instituto Tecnológico de Ciudad Juárez. AHP was used to find the equipment problem sensors and determine all the criteria weights and rank elements. The principal methodology is applied to a 3D Atomic IV printer to formulate a critical PM strategy.