GMC Engineer Shop Truck

In another article on this website I wrote an article on the GMC Shop Trucks with the ST-5 and ST-6 bodies. There were a lot of models with different purposes for specific tasks built. Beside these mentioned vehicles other Shop Trucks were built. One of these is the GMC Engineer Shop Truck. A complete and very detailed discription of this vehicle is depicted in the Technical Manual TM 5-9352 titled "Shop, Engineer, Motorized, General Purpose, Repair" from February 1944.
In Tm 9-2800 from 1943 the following presentattion of this vehicle is given. An unaltered page was committed to this vehicle in TM 9-2800 from 1947. So it's safe to assume that these Shop Trucks served unaltered during the war years.
The General Purpose shop truck is designed for repair and maintenance work in both operating organizations and higher echelon maintenance organizations. In general Engineer organizations, it ordinarily operates in the Headquarters and Service Company as the center ol' second echelon organizational maintenance. When issued to general Engineer organizations, it is frequently accompanied by the trailer-mounted set of electric arc welding equipment. This set supplements the oxyacetylene welding equipment furnished on the General Purpose shop itself. In Engineer maintenance companies or Engineer heavy shop companies, the shop functions as a third and fourth echelon job-site repair unit.
The General Purpose shop truck often operates in conjunction with the following other motorized shops of the Engineer maintenance company:

- Shop, Motorized, Tool and Bench. This shop provides general repair facilities of the type normally found in well equipped commercial repair establishments. It has the widest variety of hand and power tools of any of the Engineer motorized shops. Its equipment includes a valve-refacing and valve seat grinder and required accessories, a 1-ton capacity differential chain hoist, a 100-ton hydraulic press, a diesel injector repair set, a complete group of pulling and extracting tools, a tractor maintenance set, valve and piston service tools, babbitting equipment, battery servicing tools, radiator test and repair sets, and a chain saw sharpener.

- Shop, Motorized, Welding. This shop has both electric arc and gas welding facilities, and is designed to accomplish welding operations on location. It is equipped with a 300-amp gasoline engine driven welder with a 3-kw auxiliary generator, a 27-piece oxyacetylene welding and cutting set, a large assortment of electrodes, a blacksmith forge with shovel, a 100-lb anvil, and other blacksmith accessories.

- Shop, Motorized, Electrical Repair. This shop provides facilities required for the repair of searchlights, searchlight power plants, control stations, electric generators and other items of electrical equipment. It contains most of the equipment of the General Purpose shop truck, except that it lacks the bench grinder. It has, in addition, a universal vulcanizing set containing 517 items, a set of electrical measuring instruments (ammeter, millivolt-meter, AC-DC test unit, growler, megohmmeter and low voltage circuit tester), soldering copper, a grease gun, and other materials required for electrical repair work.

- Shop, Motorized, Emergency Repair. This shop has a limited assortment of power tools, a %-inch heavy-duty drill, a portable grinder, a 1-1/2 kw generator, and hand tools.

- Shop, Motorized, Machine Shop. Light. This shop provides machine shop facilities, including a 10-inch lathe, a 16-inch floor-type drill press, a 7-inch bench shaper, a 1/2-inch drill, a 7-inch bench grinder, a lathe grinder, a 5 x 5-inch capacity power hack saw, and a universal dial test indicator.

- Shop, Motorized,Machine Shop, Heavy. This shop is capable of heavier machine tool operations than the Light Machine shop, being equipped with a 14-inch lathe, a tool post grinder, an 18-inch swing, 1-inch capacity floor-type drill press, a brake reliner and a cylinder boring bar.

- Shop, Motorized, Small Tool Repair. This shop is designed for the repair of portable gasoline and pneumatic-powered tools such as the gasoline chain saw, the gasoline hammer and the tools furnished on the motorized air compressor. It is fundamentally different from all other shops in that it is equipped with pneumatic power, which gives it wide adaptability, including greater reliability of operation under extremely wet conditions. It has a pneumatic drill, a pneumatic grinder, a 32-piece pneumatic tool set, a 10-ton hydraulic press, and a 60-cfm air compressor.


Both opened and closed version of this vehicle. The closed cab was until july 1943 the only version as the TM 9-2800 from 1943 stes that the open cab versions were supplied after July, 1943.