4 Maintenance4.1 IntroductionStructure of this chapterThis chapter describes all the maintenance activities recommended for the IRB6720.It is based on the maintenance schedule found at the beginning of the chapter.The schedule contains information about required maintenance activities includingintervals, and refers to procedures for the activities.Each procedure contains all the information required to perform the activity,including required tools and materials.The procedures are gathered in different sections and divided according to themaintenance activity.Safety informationObserve all safety information before conducting any service work.There are general safety aspects that must be read through, as well as more specificsafety information that describes the danger and safety risks when performing theprocedures. Read the chapter Safety on page 15 before performing any servicework.The maintenance must be done by qualified personnel in accordance with thesafety requirements set forth in the applicable national and regional standards andregulations.Product manual - IRB 6720 1013HAC085697-001 Revision: C© Copyright 2023 ABB. All rights reserved.4 Maintenance4.1 Introduction