Some MACK Truck Wiring Diagrams, Schematics are above the page.
By the middle of the third decade of the last century, "Mack" was in the first "five" of US truck manufacturers, on an equal footing with such giants as GMC (Owner Manuals PDF page) and Ford (Service Manuals PDF page). In 1933, the first truckless truck appeared in the programю
This time, the company also used third-party developments. Much credit in the advanced solutions of the early years was due to cooperation with the Swiss from the "Saurer", part of the elite of the truck industry. And the younger series of pick-ups Mack Junior model 1936 was simply bought from the well-known then manufacturer Reo, received only a new badge.
Like other firms, during the Second World War, "Mack" suspended the production of civilian models, switching to military products. First of all, it included heavy three-axle 6- and 7,5-ton models of NM and NR (6x4) and NO (6x6). In all, during the war years, about 27,000 machines of all types were delivered to the US Army and allies.
In addition to trucks, "Mack" continued to successfully develop and produce buses, both urban and tourist. The heyday came just in the 50s of last century. And the urban C50 vehicles with frame-panel bodies turned out to be so successful that they were not only ordered by New York, but were also produced under a license called Metropol in Sweden by Scania-Vabis (Manuals PDF page).
In the same years, the export program is also actively developing - in addition to neighboring Latin America, the machines that have become known during the war are actively bought by allies overseas. In England, France and Holland, even the assembly of "Mack" is started by local firms, albeit in small numbers.