Repairs broken, worn and otherwise damaged mechanical and electrical parts of motorized equipment in trucks, automobiles, bulldozers, motor graders, cranes or rollers and makes the necessary adjustments to keep such equipment in a satisfactory working condition; replaces broken, worn and defective parts such as gears, shafts and bearings; makes adjustments to correct faults such as imperfectly operating tie rods and steering gear or poor wheel alignment; makes adjustments to such parts as motor, brakes and ignition system; disassembles parts of the vehicles such as the motor, differential, transmission and running gear, removing each individual piece and examining it carefully for wear, breaks and otherwise undesirable characteristics; clean each part with gasoline to expose breaks or worn places; replaces worn or broken parts and reassembles the pieces in their respective places, tightening lock nuts, sets screws, bolts and nuts securely and evenly; checks moving parts and makes necessary adjustments to assure that alignments and clearances are proper; adjusts and sets timing mechanism; occasionally makes wheel repairs to motorized equipment such as bulldozers, motor graders and tractors; occasionally repairs dented fenders and truck bodies and patching where necessary; instructs a group of automotive mechanic helpers or wards or inmates as part of an organized apprenticeship program and teaches them the techniques of the trade; periodically checks on work progress and makes reports for appropriate supervisor; leads a group of automotive mechanics when performing large repair jobs requiring use of more than one automotive mechanic. Ability to: Operates motorized equipment; estimates material, parts, and labor necessary to perform an overhaul job; operates the various machines and equipment used in adjusting, maintaining and repairing motorized equipment; locates and adjusts mechanical defects and makes necessary repairs to motorized equipment; does welding and simple sheet metal and blacksmith work; makes working sketches and drawings; gives and receives both oral and written instructions.