Came across this one at
www.fourwheeler.com
The title is “Backward Glances: Military M-818 6x6 and Shop Trailer from the Vietnam era”
The shop trailer is 30 feet long and weighs 31,000 pounds. Technically called a “Shop Equipment, General Purpose Repair, Semitrailer Mounted.”
“The trailer has a 12kw, 240V generator with a 100 percent duty cycle that also powers a Hobart dynamotor 200-amp welder. The generator engine is a Hercules D298 six-cylinder diesel. The hydraulically operated clamshell doors can be attached to a tent that completely encloses the shop for cold or inclement weather, and a 60,000-Btu diesel heater is part of the kit. Shop air is supplied by a two-stage electric compressor with a 40-gallon tank. The machine tools carried were somewhat variable, but normally included a lathe with a milling attachment, shop grinders, valve refacer, drill press, 17.5-ton press, 100-ton press, monorail hoist, oxy-acetylene welder, workbenches, grinders, vices, and lots and lots of handtools.”
“As far as semi-trailers go, the shop trailer isn’t huge. Since mobility in rough terrain is a factor with all military vehicles and equipment, making them as compact as possible is important. The fifth-wheel on the M-818 is rated to pivot 21 degrees up, 15 degrees down, and 7 degrees to the sides. Off-road, the fifth-wheel load is rated at 15,000 pounds, but on-road it’s 25,000 pounds.”
And take a gander at the pics!
Seems like a excellent starting point!!