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What is the difference between secondary maintenance and tertiary maintenance?

1 Answers

LaAlessandra

07/30/25 12:02am

The difference between secondary and tertiary maintenance lies in the scope of services. Secondary maintenance refers to routine maintenance, while tertiary maintenance is commonly known as "major maintenance". Secondary Maintenance: The purpose of secondary maintenance is to keep all vehicle components, machinery, and assemblies in good working condition. Service items include all tasks from primary maintenance, plus inspecting and adjusting the engine and electrical equipment, removing and cleaning the oil pan and oil filter, checking and adjusting steering and braking mechanisms, removing and cleaning front and rear wheel hub bearings, adding lubricants, inspecting tires and performing tire rotation, among others. Tertiary Maintenance: Tertiary maintenance involves disassembling, cleaning, inspecting, adjusting, and troubleshooting vehicle assemblies. Its goal is to ensure the proper functioning of assemblies and components by replacing parts that may fail after prolonged use. Major maintenance includes all routine maintenance tasks, plus engine disassembly and inspection to remove carbon deposits, gum residues, and cooling system contaminants; dismantling, cleaning, inspecting, adjusting, and troubleshooting chassis assemblies as needed; and inspecting the frame and body for rust or performing touch-up painting.

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