Preventive Maintenance
Scheduled PM programs that keep your trucks on the road and out of the shop. We catch problems before they catch you.
Overview
What We Do
The most expensive repair is the one that could have been prevented. A disciplined preventive maintenance program is the single best investment a truck owner or fleet manager can make — and it's the foundation of every high-performing commercial diesel operation. H&H Diesel Services offers tiered PM programs for owner-operators and fleets of all sizes across Central and South Texas. From basic A-service oil and filter changes to comprehensive annual inspections and DOT compliance checks, our PM schedules are built around your equipment, your mileage, and your specific vocation. Whether you're running regional freight, oilfield support, construction equipment, or long-haul routes, we keep your trucks maintained, compliant, and ready to work.
A-Service (15–25K Miles)
Engine oil and filter change, fuel filter replacement, visual inspection of belts, hoses, lights, and fluid levels. The baseline that keeps your engine protected between major services.
B-Service (50K Miles)
Everything in A-service plus coolant SCA check and treatment, air filter inspection, brake adjustment, and a more thorough visual inspection of the chassis and drivetrain.
C-Service (Annual)
Comprehensive annual inspection covering the full drivetrain, electrical system, aftertreatment, injector condition, valve lash, and a complete DOT-level safety inspection.
DOT Inspection Prep
We run through the full Level 1 DOT inspection checklist before your trucks hit the road. Violations are corrected on the spot so you don't get surprised at a weigh station.
Fluid Analysis
Oil and coolant analysis gives you a window into engine health between teardowns. We send samples to a certified lab and review results with you — catching wear trends before they become failures.
Fleet Scheduling
We work with fleet managers to build a PM calendar around your operation. Priority scheduling, maintenance records, and reminders keep your fleet compliant and your trucks earning.
Ready to Get Started?
Let's Get Your
Truck Back on the Road
Call us or send a message and we'll get you scheduled fast. No runaround, no upsell — just straight answers and solid work.