Diesel Technician, Johannesburg

The Diesel Technician will be responsible for diagnosing, repairing, and servicing fleet vehicles and heavy-duty trucks within the Mayfair Gearbox Fleet Division. The role requires strong mechanical expertise, the ability to work efficiently under pressure, and a commitment to delivering high-quality workmanship to minimise downtime for fleet clients.

• Key Responsibilities
  Diagnostics & Fault Finding
• Perform accurate diagnostics on diesel engines and related systems.
• Identify faults in engines, gearboxes, clutches, diffs, air systems, braking systems, and driveline components.
• Use diagnostic tools and equipment to assess mechanical and electronic faults.
• Provide accurate feedback to the foreman/service advisor for quoting and repair planning.

Repairs & Maintenance

• Conduct repairs on heavy-duty diesel engines and components.
• Perform gearbox removals and refits when required.
• Replace or repair clutches, differentials, prop shafts, turbochargers, and fuel system components.
• Carry out preventative maintenance and scheduled fleet servicing.
• Ensure all repairs are completed to Mayfair Gearbox standards.
• Fleet Support
• Assist with breakdown diagnostics and urgent fleet repairs.
• Ensure minimal downtime for fleet clients through efficient workmanship.
• Maintain service schedules and complete jobs within agreed turnaround times.

Quality Control

• Ensure correct repair procedures and torque specifications are followed.
• Conduct final inspections before releasing vehicles.
• Minimise comebacks by maintaining high standards of workmanship.
• Report any additional faults discovered during repairs.
• Workshop Operations
• Maintain accurate time recording and job card updates.
• Use workshop tools and equipment correctly and responsibly.
• Maintain cleanliness and organisation of work area.
• Assist other technicians and apprentices when required.
• Health & Safety Compliance
• Follow all workshop safety policies and procedures.
• Ensure correct use of PPE at all times.
• Operate lifting equipment and machinery safely.
• Maintain a clean and hazard-free working environment.

Minimum Requirements

• Matric / Grade 12 (preferred).
• Trade Test qualification as a Diesel Mechanic (essential or advantage).
• Minimum 3–5 years experience as a Diesel Technician in a commercial or fleet workshop.
• Experience working on heavy-duty trucks (essential).
• Valid driver's license (Code 14 / EC advantage).

Technical Knowledge Required

• Diesel engine diagnostics and repairs.
• Manual and automated truck gearboxes (advantage).
• Clutch systems and driveline components.
• Air brake systems and suspension systems.
• Fuel systems (injectors, pumps, common rail systems).
• Preventative maintenance and fleet servicing procedures.

Key Skills & Competencies

• Strong fault-finding and diagnostic ability.
• Ability to work under pressure and meet deadlines.
• Good time management and productivity focus.
• High attention to detail and quality workmanship.
• Ability to work independently and as part of a team.
• Good communication skills.
• Reliable, disciplined, and accountable.