Truck & Trailer Repair Guides
Practical field guides from Andy Mandt — 15+ years of mobile diesel repair on the I-94 corridor.
maintenance
Diesel Truck Maintenance: What Actually Keeps a Class-8 Running
The fuel system, the aftertreatment, and the coolant — the diesel-specific systems where the most expensive surprises live on a Class-8, and what a mechanic on the I-94 corridor checks first.
Semi-Truck Maintenance: A Field Guide for Owner-Operators
The fifth wheel, the air system past the chambers, and the trailer components that get treated as afterthoughts — and the combination-specific maintenance habits that keep a tractor-trailer out of service and off the shoulder.
The Truck Maintenance Checklist We Run Before Every Season
The clockwise pre-trip walk-around in order, the PM schedule for a new owner-operator, the seasonal add-on heading into winter, and why a tire that looks full still needs a gauge.
Truck Maintenance: A Diesel Mechanic's Complete Guide
The service intervals I actually run, the tire pressure and brake checks drivers skip most, the synthetic-oil myth that cooks engines, and the PM schedule I'd hand a new owner-operator on the I-94 corridor.
What's Actually in a Truck PM Service (and What It Saves You)
The full PM checklist I run on every commercial diesel, why brakes and tires are the items that most often become same-day repairs, and the wheel-seal catch that found failing bearings before they ruined a spindle.