Let us now proceed through the progressive assembly by units.
PLAN No. 1105. PLACING THE FRAME
The frame with its necessary brackets and springs having been assembled in a subassembly department, is placed upon the conveyer. Where the frame is heavy, an air or hydraulic hoist is used. This operation is usually done by two men, who must be able to move about freely but are not compelled to climb or to move rapidly. A man capable of hooking a chain to the frame and who is able to move a short distance can easily qualify.
PLAN No. 1106. FRONT AND REAR AXLES
The frame having been placed upon the conveyer, the spring and front and rear axles are then attached. The rear axles are usually mounted by two men with the aid of a hoist. These axles like the frame have been assembled in a subassembly department of the factory.
The men who attach the axles to the frames need not be expert mechanics but must know how to handle wrenches and hand tools. They must be able to move about freely and be able to start the nuts or bolts and tighten them. Special tools are used where possible to save time. Time is a big factor in this department. If the mechanic does not complete his operation in a given number of feet on the conveyer, he will interfere with the next operation. The conveyer is moving all the time and he must complete his operation within his allotted space.
PLAN No. 1107. MOUNTING THE TRANSMISSION
Following the assembly of the axles to the frame, the transmission gear set is mounted and bolted into place. In many cases the transmission is attached to the engine (unit power plant), in which case this operation is completed when the engine is put into place. The men doing this operation need not be skilled mechanics, but must be able to use hand tools and move about freely. A man with an artificial leg could do this work easily. Again a man with one good hand and part of other could do this work.
PLAN No. 1108. PLACING THE ENGINE
The engine is the next unit attached to the frame. In placing the engine a hoist is used and no heavy lifting is required. The engine is lowered into place and securely bolted. The propeller shaft also is attached and necessary connections are made. Usually the engine has had the carburetor, ignition system, and starting and lighting equipment attached to it in the engine department. For this operation men do not need to be mechanics. A workman must be able to handle hand tools such as wrenches, screw drivers, and hammers, should have strength enough to help place the engine, and should be able to move about freely. This work is all done standing and moving about. All work of this nature is passed upon by an inspector.