Bus Repair Service in Tyler, TX

Bus Types We Service

Our technicians are experienced across the full range of commercial and municipal bus types:

• School buses & activity buses
• Transit & city buses
• Charter buses & motorcoaches
• Shuttle buses & passenger vans
• Church & nonprofit buses
• Municipal & government fleet buses
• Airport & hotel shuttle buses
• Special needs & accessibility-equipped buses

Bus Repair & Maintenance Services

Regular inspections are crucial for bus maintenance. Ideally, a thorough inspection should be conducted every 10,000 miles, or at least twice a year. This ensures any potential issues are identified early, preventing costly repairs and ensuring safety on the road.From routine preventive maintenance to complex engine work, we handle the full scope of diesel bus repair:

• Engine repair, rebuild & overhaul - diesel engine diagnostics, top-end and full engine rebuilds for all major bus platforms
• EGR & DPF service - emissions system cleaning, repair, and replacement to keep your buses compliant with diesel emissions regulations
• DOT inspection & compliance - pre-trip inspection prep, safety system checks, and post-repair re-inspection
• Transmission & clutch - Allison automatic transmission service, manual transmission repair, clutch replacement
• Brake system repair - air brake inspection and repair, drum and disc brake service, brake chamber replacement
• Electrical & diagnostics - computerized diagnostics, wiring repair, lighting systems, ABS and sensor replacement
• Cooling system service - radiator repair and replacement, coolant flush, water pump and thermostat service
• HVAC repair - bus air conditioning diagnostics, refrigerant recharge, heating system repair
• Suspension & steering - air suspension repair, front-end alignment, steering component replacement
• Exhaust system repair - muffler, DPF, SCR, and exhaust pipe repair and replacement
• Preventive maintenance - oil and filter service, fluid checks, belts and hoses, pre-season inspections
• Welding & fabrication - frame repair, custom bracket fabrication, structural repair

The Hex 6 Repair Process

At Hex 6 Diesel Services, our approach to bus repair in Tyler, TX, is comprehensive and transparent. No matter what issues your bus is suffering from, you will experience the Hex 6 process.

Initial Diagnosis: Every repair starts with a thorough diagnostic check. We use advanced tools to pinpoint issues, from engine performance to electrical systems.

Detailed Quotation: Once we identify the problem, we provide a detailed quote. This includes a breakdown of the repair costs, parts needed, and an estimated time for completion.

Quality Repairs: Our team of skilled mechanics, with their expertise in heavy-duty diesel repairs, carries out the repairs. We only use high-quality, durable parts, ensuring your bus returns to the road in top condition.

Testing and Quality Control: After repairs, we conduct rigorous testing. This step is crucial to ensuring that all repairs meet our high standards and that your bus is ready for safe operation.

Post-Repair Support: We believe in building lasting relationships. After the repairs, we provide support and advice on maintaining your bus to prevent future issues.

Bus Brands We Service

Our technicians work on all major diesel bus platforms:

Blue Bird · Collins Bus · Freightliner · IC Bus · Lion Electric · MCI · Nova Bus · Thomas Built Buses · Trans Tech · Van Hool · Workhorse

Don't see your brand listed? Call us - if it runs on diesel, we can work on it.

School Districts & Government Fleets

Keeping school buses safe and compliant is non-negotiable. Hex 6 works with school districts and municipal fleet operators across East Texas to provide:

• Scheduled preventive maintenance programs aligned to district service intervals
• DOT and state safety inspection compliance
• Emissions system service to meet Texas diesel regulations
• Priority scheduling to minimize fleet downtime during the school year
• Detailed repair documentation for district records and warranty requirements
• Fleet maintenance partnerships with reduced labor rates through our Fleet Advantage program

Hex 6 is also certified to compete for government contracts - making us a qualified vendor for school districts, municipalities, and other public entities seeking certified suppliers.

What role do diesel emissions regulations play in school bus maintenance?

Diesel emissions regulations require school buses to use advanced after-treatment systems like DPF and SCR to reduce pollutants. These systems demand regular inspections, fluid management, and periodic cleaning to ensure compliance and optimal bus performance.

How Often Should Buses Be Inspected?

At minimum, buses should receive a thorough inspection every 10,000 miles or twice per year - whichever comes first. For school district and government fleets, Texas state requirements and DOT regulations set additional inspection intervals that must be followed.

Recommended maintenance intervals:

• Every 5,000–10,000 miles: Oil and filter change, fluid level checks, belt and hose inspection
• Every 25,000–30,000 miles: Full brake inspection, transmission service, cooling system check
• Annually (or per regulatory requirement): DOT safety inspection, emissions system inspection, full preventive maintenance

Operating in East Texas heat puts additional strain on cooling systems and AC. Pre-summer inspections - particularly for school buses returning to service in August - are strongly recommended to avoid overheating issues during the hottest weeks of the year.

Bus Repair Shop in Tyler, TX

At Hex 6 Diesel Services, your bus's performance and safety are our top priorities. Our team is equipped with the expertise and tools to handle a wide range of bus repairs. If you’re in need of comprehensive bus repair services in Tyler, TX, get in touch with us today. 

Let us keep your fleet running efficiently and safely!

Frequently Asked Questions

Do you perform DOT inspections on buses?
‍Yes. We perform DOT safety inspections and can handle any required repairs to bring your bus into compliance. If your bus fails an inspection elsewhere, bring it to us — we'll assess the issues, make the necessary repairs, and get it re-inspected.

How do diesel emissions regulations affect school bus maintenance?
‍Texas school buses must meet federal emissions standards, which require functioning after-treatment systems including diesel particulate filters (DPF) and selective catalytic reduction (SCR) systems. These systems need regular inspection, fluid management (DEF), and periodic cleaning to stay compliant and perform correctly. Neglected emissions systems are one of the most common causes of school bus downtime.

How do I prevent my school buses from overheating in summer?
‍Regularly checking coolant levels, flushing the cooling system on schedule, inspecting hoses for cracks or leaks, and confirming the radiator and water pump are functioning correctly are the core preventive steps. We also recommend running AC diagnostics before the school year starts in August - East Texas heat is hard on bus cooling systems. [Read our detailed guide on cooling system and AC maintenance for school buses.]

Can you handle our entire district fleet?

‍Yes. Our 36-bay shop has the capacity to service multiple buses simultaneously. We work with school districts and municipal fleets to build maintenance schedules that minimize downtime and keep your buses compliant year-round. Ask about our Fleet Advantage program for reduced labor rates and priority scheduling.

Do you work on accessibility-equipped buses?

‍Yes. We service buses with wheelchair lifts, tie-down systems, and other accessibility equipment. Mechanical and electrical issues with lift systems are something our technicians handle regularly.

Are you a certified vendor for school district or government contracts?
‍Yes. As a woman-owned certified business, Hex 6 is positioned to work with public entities including school districts, municipalities, and government agencies that require certified supplier status. Contact us to discuss your procurement requirements.

Areas We Also Serve For Bus Repairs in Texas

As well as Tyler, TX, we also proudly bring our bus repair service to the following surrounding areas, Longview, TX, Kilgore, TX, Jacksonville, TX, Henderson, TX, Athens, TX, Palestine, TX, Sulphur Springs, TX, Marshall, TX, Nacogdoches, TX, Lufkin, TX, Corsicana, TX, Dallas, TX, Plano, TX, Garland, TX, Mesquite, TX, Terrell, TX, Greenville, TX, Mount Pleasant, TX, and Paris, TX.