Originally posted by lesmore49 Now that's an interesting motor grader. Looks like it has miles on the odo and hours on the meter.
I couldn't identify the make? Wondering about year, engine...what types of uses before and during your ownership ?
It is a 1948 Adams 412 motor grader. The engine is an International Harvester UD14 engine is a 461 cu.in. 4 cylinder that has 303 lbs torque at 68.5 hp. Designed to be started on gasoline, and then once warmed up switched over to diesel. Normally aspirated it has a magneto and intake manifold on one side of the engine, and an injector pump and intake manifold on the other side of the engine. The cylinder head has chambers, called starting chambers. They are exposed to the combustion chamber above the pistons via a third valve, opened and closed via a lever in the cab. Each starting chamber has a spark plug, and is the only route to the cylinders for the incoming gas/air mixture. When the starting valves are closed another linkage grounds the magneto to stop the plugs from continuing to fire when the engine is switched to diesel, and the engine then begins to run on diesel, and the machine is ready to work.
All of the functions (blade, rippers, front axle lean) are all operated via a gearcase in the cab that is powered by a shaft that exits the front of the drop box which also sends engine power to the drive axles which sit below the engine. The lever for a particular function is either pushed or pulled, and the function is operated via a train of shafts, universal joints and gearboxes. When a function reaches the limit of its movement (deadheaded) the gears the lever is connected to kick back, sometimes quite violently. One learns real quick those limits, and to ease off on pressure of the lever, or it will spank the hand.
They are affectionately knows as "knuckle busters" by the men who operated them back in the day.
It has the optional full cab, although they never had doors, and someone has added them to this one.
The machine was once owned by a company called Northwest Roads, based in Seattle. It was used for road construction during the post war growth period in this region, building roads, highways, or whatever else one does with a motor grader. The guy I bought it from bought it from a guy who had it on an island in the Aleutian chain of islands in Alaska that had a few roads to maintain. Then he used it in Gig Harbor, Washington on a private road he lived on, before I bought it to do the same here in Arlington.
The knuckle buster gearcase and levers:
Pentax K-1, Sigma 600mm f8 Mirror.