Heavy Trucks
Class 7 and 8 preventive maintenance, DOT inspections, aftertreatment and DEF, air brakes, and drivetrain service for working trucks.
- APU and Idle-Reduction System Maintenance
How to keep an APU reliable, why it saves fuel and engine wear, and the service it needs to keep doing its job.
- Air Dryer Service and Why It Matters
How the air dryer protects your brake system from moisture, the signs it's failing, and the simple service it needs.
- Coolant SCA Testing and Extended-Life Coolant
Why heavy-truck coolant needs testing, what SCAs and liner pitting are, and how ELC differs from conventional coolant.
- Fifth Wheel Inspection and Lubrication
Why fifth wheel maintenance is a safety item, how to lubricate and adjust it, and the wear that leads to coupling problems.
- Building a Cost-Per-Mile Maintenance Budget
How to calculate maintenance cost per mile, why it's the number that runs a fleet, and how preventive maintenance lowers it.
- Drivetrain Service: Clutch, Transmission, and Differentials
How to keep a heavy-truck driveline alive with proper fluid service, plus the wear signs that warn before a costly failure.
- Oil Analysis Programs for Truck Fleets
How used-oil analysis catches engine problems early, safely extends drain intervals, and lowers fleet maintenance cost.
- Commercial Tire Management and Retread Economics
How proper inflation, rotation, and retreading lower your cost per mile and prevent the #1 roadside failure.
- Wheel Bearing and Hub Maintenance on Heavy Trucks
How wheel-end maintenance prevents bearing failures and wheel-offs, plus the seal and lubrication checks that matter.
- DPF Cleaning Intervals for Class 8 Trucks
Why even a self-regenerating DPF needs periodic off-truck cleaning, typical mileage windows, and what drives ash buildup.
- Port Drayage Duty Cycle: Maintenance for Charleston Fleets
Why port drayage trucks wear differently, the hour-based items short-haul fleets skip, and how to schedule around stop-and-go and idle.
- Roadside Breakdown Prevention Checklist
The pre-trip and PM habits that keep trucks off the shoulder, built around the failures that actually strand them.
- Decoding Aftertreatment Derate Codes (SPN/FMI Basics)
What a derate is, how to read SPN/FMI fault codes, and which aftertreatment faults you can't afford to ignore.
- DEF, SCR and DPF: Heavy-Truck Aftertreatment Maintenance
How the modern truck emissions system works, what maintenance it needs, and how to avoid a derate on the road.
- Air Brake Maintenance and Slack Adjuster Basics
How air brakes work, why adjustment is the number-one roadside violation, and the checks that keep your truck legal.
- DOT Annual Inspection Checklist for Commercial Trucks
What a federal annual inspection actually covers, the items that fail trucks most often, and how to prep so you pass the first time.
- Heavy Truck PM Schedule Basics: A, B, and C Service Explained
What an A/B/C preventive-maintenance schedule covers on a Class 7–8 truck, typical intervals, and how to keep a DOT inspection from sidelining you.