LOCOMOTIVE MECHANIC (112)
Foreman, Mechanic, Locomotive
Locomotive Brake Inspector
Locomotive Brake Mechanic
Locomotive Hostler
Oiler, Locomotive
Railway Locomotive Mechanic, General

Performs various types of mechanical repair in a railroad repair shop in connection with the maintenance of military railroad locomotives.  Tests engine parts for defects and replaces defective parts. Inspects, tests, and repairs or replaces air, vacuum, or steam brakes and brake operating equipment. Lays off and lines down locomotive shoes and wedges. Aligns and repairs locomotive rods and pins. Rebores cylinders. Repairs and replaces trim on locomotives. Adjusts and sets locomotive valves. Lubricates locomotive parts.

MACHINE OPERATOR (DESIGNATED MACHINE) (302)
Boring Mill Operator
Milling Machine Operator
Drill Press Operator
Planer Operator
Engine Lathe Operator
Shaper Operator
Grinding Machine Operator

Operates one or more machines used in machine shops to change the shape of metal parts or tools.

MACHINIST (114)
Engine Specialist (Machinist, Automobile)
Foreman, Machine Shop
Foreman, Machinist
Railway Mechanic, General
Tool Maker

Makes metal parts and tools from metal castings, forgings, and stock, working to close tolerances in a military machine shop.
Studies blueprint, selects metal stock, and lays out work, using guide gauge, straightedge, and protractor. Sets up work in machines and selects correct shaped and sharpened cutting tool for each type of machine to be used.

MACHINIST'S HELPER (431)

Assists a machinist in the construction and repair of metal parts, tools, and machinery in connection with the operation of an Army machine shop.

MASTER MECHANIC (342)
Millwright

Supervises the maintenance and repair of shop facilities at an Army repair shop, machine shop, or other similar maintenance center.

MECHANIC, AUTOMOTIVE, TRACK VEHICLE (THIRD ECHELON) (966)

Performs medium (third echelon) field maintenance on all types of tanks, assault guns, and other full-track-laying vehicles.

MECHANIC, AUTOMOTIVE, WHEEL VEHICLE (THIRD ECHELON) (965)

Automotive Assembler
Automotive Repairman (AAF)

Performs medium (third echelon) field maintenance on all types of wheel and half-track Vehicles.

MECHANIC, CHASSIS, TRACK VEHICLE (908)

Performs unit replacement, field repairs and adjustments, trouble diagnosis, and complete rebuilding of units of power train and suspension systems of full track—laying vehicles other than tractors and artillery prime movers.