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Diesel Maintenance

At JL Mobile Truck & Trailer Repair, we are equipped to tackle all maintenance requirements for semi trucks, heavy diesel equipment, and tractors in Joplin, MO, and the Four States. Our diesel mechanics offer both in-shop repairs and 24/7 roadside maintenance!

24/7 Roadside Diesel Repair for Semis

We know how frustrating it can be to have your 18-wheeler breakdown when you've got freight to haul on a deadline. Our mobile diesel mechanic is equipped to perform emergency maintenance and tire changes 24 hours a day and seven days a week and return your rig to the road fast!

Joplin, MO Diesel Repair Shop

We can perform major diesel repairs in our Joplin, MO shop. We are not only set up to maintain semi trucks and trailers but can tackle repairs on all heavy diesel equipment, including tractors, construction equipment, and certain RVs.

Heavy Diesel Maintenance List

The following is a list of our maintenance services for semi trucks and heavy diesel equipment. We can tackle all elements of diesel maintenance aside from bodywork.


    • Diagnose and fix issues with the engine, such as overheating or loss of power.
    • Replace or repair malfunctioning components, like injectors, turbochargers, or the fuel system.
    • Perform regular maintenance tasks, including oil changes and filter replacements.


    • Identify and address transmission problems, such as slipping or difficulty shifting.
    • Replace worn-out clutch components or repair automatic transmission issues.
    • Ensure proper fluid levels and replace transmission fluid as needed.

Brake System

    • Inspect and replace brake pads, rotors, and calipers.
    • Address issues with the air brake system, including leaks and malfunctions.
    • Check and adjust brake drums and linings for optimal performance.

Suspension and Steering

    • Replace worn-out suspension components, such as bushings or shocks.
    • Address steering system problems, including issues with the steering gear or alignment.
    • Inspect and repair the truck's chassis for any signs of damage or fatigue.

Electrical System

    • Troubleshoot and fix electrical issues, including faulty wiring or malfunctioning sensors.
    • Repair or replace alternators, starters, and batteries.
    • Ensure proper functioning of lights, indicators, and other electrical components.


    • Identify and fix exhaust leaks or damaged components.
    • Replace or repair the diesel particulate filter (DPF) if necessary.
    • Ensure compliance with emissions regulations.


    • Address issues with the radiator, thermostat, or water pump.
    • Flush and replace coolant as part of routine maintenance.
    • Repair leaks in the cooling system.

Tire and Wheel

    • Rotate and balance tires regularly.
    • Repair or replace damaged tires.
    • Check and tighten wheel nuts to ensure proper fastening.


    • Repair or replace hydraulic components, such as hoses, cylinders, or pumps.
    • Address issues with the hydraulic brake system if applicable.
    • Ensure proper functioning of hydraulic systems for specialized truck features.


(417) 438-9461

120 N Prigmor Ave, Joplin, MO 64804

Monday-Sunday 24/7