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Diesel Mechanic - Heavy Duty (Mobile) Diesel Technician

Precision Diesel
Huntington, CA Full Time
POSTED ON 8/1/2026
AVAILABLE BEFORE 11/28/2026

COMPANY: Precision Diesel is a premiere 26-year-old mobile diesel truck and trailer Fleet Services & Repair Company in Southern California.

POSITION: Mobile Diesel Truck & Trailer Mechanic – Heavy and Medium Duty

LOCATION: Huntington Beach

COMPENSATION: Base level $38.00 - $50.00 per hour based on experience plus medical benefits. Please inquire for more details.

JOB SUMMARY: Mobile Heavy & Medium Duty Truck and Trailer Fleet Services, Inspections, & Repairs.

Most Common Repairs Include:

· DOT & BIT Inspections

· Computer Engine Diagnostics with JPro, Cummins Insite, Detroit Diesel Diagnostic Link, International Navistar, Diesel Laptop, or similar tools. Must be able to Identify fault codes and make necessary repairs

· ECM Calibrations & Updates

· Testing & Resetting the SCR System (SCR Catalyst, DEF Injector (Doser Valve), DEF Pump, and DEF Tank & Heaters)

· Conduct DEF Quality Testing & Priming

· Forced Regens

· EGR Valve Testing & Replacement

· Fuel System Priming (Air in the Lines)

· Troubleshooting Wiring and Signal Issues

· Wheel seal replacement

· Mobile - Radiator / Coolant leak repairs

· Extract broken studs. Reinstall new studs and outer cap nuts.

· Brake replacements – Drums, Shoes, Air Lines, etc.

· Replace Slack Adjusters

· Fan Clutch Replacement

· Electrical / Lighting / Fuses Troubleshooting and replacement. Tracing Shorts\

· Install new radiator, hose-elbow, clamps, and top fluids.

· DPF & DOC Filter Replacements

· Remove and replace DEF Pump, Inlet Nox Sensor, DEF Dozer Valve, and other components of the aftertreatment system.

· Truck, Liftgate & Reefer battery replacements

· Trailer and Container chassis repairs

· Liftgate Repairs

· Air Spring / Air Bag Replacements

· Install New Landing Gear

· Wet Service – Oil, Coolant, Fuel / Water Separator fluid exchange and filter replacement

· Flush Radiator

· Install new 7-way electric breaker with new box

· Install Brake Air Lines

· Replace Leaf Springs

· Remove and replace spring brake control valve

· Remove and Replace Starters & Alternators

· Remove and replace the crankcase filter

· Install Gladhands

· AC System- Remove and Replace all AC system components and utilize AC machines to complete all necessary aspects of an AC service.

· Perform AC leak test. Remove and replace the high-pressure discharge line. Remove and replace O-ring seals on all lines. Remove evaporator core from dash and clean all dirt and debris. Reseal the plenum.

· Clean Truck Check Certified Emissions Testing

· Clutch Adjustments

· Fleet Services, Preventative Maintenance, and Emergency Breakdown / Roadside Repairs

Provided: Fully Loaded Service Truck, Uniforms, Overtime Available, Great Working Environment

This work is accomplished through the use of hand tools, cutting torches, and welding equipment.

Work is of a physical nature and involves working outside, kneeling, bending, and stooping daily. Work provides the satisfaction of solving customers’ problems daily.

CALL TO ACTION: Do you want to work with a fast-paced company that will provide you with meaningful challenges, a quality career, good communication, treat you with respect and compensate you fairly?

Are you someone who loves solving problems? Are you a fixer? A leader?

Do you like working on your own and driving every day?

If so, then this Mobile Diesel Truck and Trailer Mechanic position is for you.

Please respond here or send your resume to precisiondieselca@gmail.com. A more detailed job description will be provided. Please note Precision Diesel is a non-smoking work environment.

Job Type: Full-time

Pay: $38.00 - $50.00 per hour

Benefits:

  • Dental insurance
  • Health insurance
  • Paid time off
  • Professional development assistance
  • Vision insurance

Application Question(s):

  • Experience with Heavy Duty Diesel Diagnostic Tools such as JPro, Cummins Insite, IDSS, Autel, eTechnician, etc.

Experience:

  • Heavy Duty Diesel Mechanic: 4 years (Required)

License/Certification:

  • Driver's License (Required)

Work Location: On the road

Salary : $38 - $50

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