Diesel Mechanic how-to
How to Perform a Truck PM Service
Preventive maintenance catches problems before they leave a truck stranded.
Preventive maintenance catches problems before they leave a truck stranded. In short: review; change; grease, then complete the remaining steps below.
Step by step
Review the vehicle’s history and the PM checklist for its mileage or hours.
Change engine oil and filters and fuel filters as scheduled.
Grease the chassis, kingpins, U-joints and slack adjusters.
Inspect belts, hoses, coolant, air lines and the air dryer.
Check brakes, tires, wheels, suspension and steering components.
Test lights, gauges and safety equipment.
Record findings and recommend repairs for anything near its limits.
Safety reminders for diesel mechanics
- Chock wheels and support vehicles with jack stands. Never rely on a jack alone
- Lock out and tag out vehicles and equipment during repairs
- Wear eye protection and gloves when working with fluids and pressurized systems
- Cage tires before inflating split-rim or multi-piece wheels
Key terms
Compression ignition · DPF · Regeneration (regen) · DEF · SCR · EGR: see the full diesel mechanic glossary.