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What is the Difference Between First-Level and Second-Level Maintenance?

1 Answers

OTanner

07/30/25 5:04am

The following are the differences between first-level and second-level maintenance: 1. Maintenance Purpose: The purpose of first-level maintenance is mainly tightening and lubrication; the purpose of second-level maintenance is mainly inspection and adjustment. 2. Maintenance Content: In addition to daily maintenance tasks, first-level maintenance focuses on cleaning, lubrication, and tightening as the core tasks, and also checks safety components such as brakes and controls. Second-level maintenance, in addition to first-level maintenance tasks, primarily involves inspecting and adjusting safety components that are prone to wear or deformation after a certain period of use, such as steering knuckles, steering arms, brake shoes, and suspensions. It also includes tire disassembly and inspection, tire rotation, and checking and adjusting the engine's working condition and exhaust emission control devices.

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