ASME A17.1 Code for Elevators & Escalator 8.6.1.2 General Maintenance Requirements: A written Maintenance Control Program shall be in place to maintain the equipment in compliance with the requirements of 8.6. (a) The Maintenance Control Program shall consist of but not be limited to, examinations, maintenance, and tests of equipment at scheduled intervals in order to ensure that the installation conforms to the requirements of 8.6. The maintenance procedures and intervals shall be based on (a) equipment age, condition, and accumulated wear (b) design and inherent quality of the equipment (c) usage (d) environmental conditions (e) improved technology (f) the manufacturer’s recommendations for any SIL rated devices or circuits (2) cleaning, lubricating, and adjusting applicable components at regular intervals and repairing or replacing all worn or defective components where necessary to maintain the installation in compliance with the requirements of 8.6.