ASE Certified Master Diesel Technician and Fleet Maintenance Supervisor with 25 years of hands-on experience in heavy-duty trucking and construction equipment. Specializes in diesel engine diagnostics, hydraulic systems, and preventive maintenance programs for commercial fleets.
Hank Kowalski brings a lifetime of grease and gears to his writing, having spent decades in the pits working on everything from long-haul semi-trucks to heavy earthmovers. He currently oversees a municipal fleet, ensuring uptime and reliability for over 200 heavy-duty vehicles. Hank explains complex mechanical concepts—like turbocharger failures, aftertreatment systems, and suspension geometry—in plain English for owner-operators and fleet managers. He is a fierce advocate for proactive fluid analysis and strict maintenance schedules to prevent catastrophic failures. His articles are the go-to resource for anyone looking to extend the life of their work trucks and avoid the dreaded "limp mode."