· Adjust, repair or replace parts and components of commercial transport truck systems · Confirm findings with supervisor to determine whether to repair or replace unit · Discuss work with supervisor · Inspect and test mechanical units to locate faults and malfunctions · Inspect mechanical units to locate faults and malfunctions · Inspect motor in operation · Review work orders · Road test motor vehicles · Test automotive systems and components · Adjust, repair or replace parts and components of automotive systems · Adjust, repair or replace parts and components of truck-trailer systems · Repair or replace mechanical units or components · Test and adjust repaired systems to manufacturer's specifications · Estimate parts and labour cost to perform vehicle maintenance and repairs · Perform scheduled maintenance service · Test and adjust units to specifications · Advise customers on work performed and future repair requirements · Complete reports to record problems and work performed · Coach and instruct apprentices · Provide customer service