Performs inspections: inspects and tests truck and heavy equipment systems, including drive train, engine operation, transmission operation, suspension, steering, brakes, electrical system, HVAC and emissions; completes or revises work order for repairs; obtains required parts; performs emission tests per frequency and criteria specified by state law; inspects and tests completed work; and updates required records. Performs preventive maintenance on trucks and heavy equipment: checks and replaces fluids; drains and replaces oil; collects and recovers Freon; changes and replaces filters; lubricates mechanical parts; installs and replaces blades; rotates, mounts and balances tires; replaces tires, belts, and hoses; checks and replaces batteries; greases equipment; flushes radiators; and performs tune-ups or other preventative maintenance activities as assigned.