Chapter 06 · Repair guides

• Preventive maintenance for semi trucks: the basicsThe services that prevent most breakdowns, and how to schedule them.
• The DOT annual inspection: what to expectWhat gets checked, who can do it, and the records you need to keep.
• How to choose a truck repair shopSigns of a shop you can trust, and questions to ask before work starts.
• Broke down? What to do, step by stepStay safe, get help fast, and avoid overpaying for roadside repairs.
• How to read a truck repair estimateLabor, parts, shop fees and the line items worth asking about.
• Truck tire care and tread depth rulesMinimum tread depth, inflation and what to check every day.
• Air brake checks and adjustment basicsWhy brake adjustment matters, and the checks every driver should know.
• DPF and DEF basics: avoiding aftertreatment headachesHow modern emissions systems work and habits that prevent costly repairs.