Type A Spreaders
Type A Spreaders
In approximately 1923 Jordan introduced the Type A Spreader. Until the Type J was introduced, the Type A was Jordans
largest Spreader. The Type A used a longer frame, larger wings and was all around bigger then the medium Standard line
or small Knuckle Braced line. Jordan marketed this as a spreader for use on railroads with larger right of ways.
One of the main noticeable things on the Type A that sets it apart are the large diagonal
braces mounted on A frames, instead of just a single diagonal brace mounted directly to the vertical post. All Type A
spreaders were built with the center cab, later ones had the front cab. All Type As also had a Rear Deck, except for
one photo from John C. LaRue Jr. in which it has no deck. It may be possible this is the prototype Type A. All Type A
Spreaders were pneumatic also, like previous models. The Type A vertical posts also differed from Standard models as they
were cylindrical instead of a more square type one. Type A spreaders were also the first to use a retractable ditch casting.
These mounted in a frame in the wing, and were lowered or raised by an air powered motor connected to an archimedes screw.
Here is a very early Type A, Possibly the protoype. From the John C. LaRue Jr. Collection
Early Type A Spreaders
The early model Type A spreaders had some noticeable features compared to the later model ones. Early Type A spreaders featured the main cylinders that open and close the wings mounted in the very
front of the vertical posts, mounted on top of another. Another early feature of these was the diagonal brace. These early ones were more of a "yoke" style one. The air cylinder was attached to a
Y type brace, with a tube then attached to that. inside the tube was the rod that raised and lowered the end of the wing. On the top of the exterior tube was an air lock. These Spreaders also featured new blades.
First off was a front blade of medium height which was reversible so ballast and or snow can be plowed to one side only at a time. The high snowplow attachment went up a few more feet higher but also had the reversible plow bottom.
The side plates of the snowplows on early model Type As featured riveted construction and had no journal access doors. The Carry Wing brace on early model Type A spreaders used a large framework in the front section. This used
a very large brace that hung over the side. It seems as if this brace would often get in the way of ditching and many machines had this removed. Early Type As used a small air cylinder and a cable to raise and lower the bank sloper.
Another option on some Type A spreaders were hydraulic brace locks. The fluid pressure came from an air driven ram type pump.
An earlier Type A, Possibly an ex GN unit as they added to their cabs. Len Murray Photo
Later Model Type A Spreaders
One major change to later Type As was that the cylinders used to
open and close the wings now were mounted behind the wings, much like
the Standard Models. Some of these still had the " Yoke" style
diagonal brace though. Later Type As had an upgraded diagonal brace
with square tube construction, also much like the Standard line. More
upgraded features are a new Carry Wing brace, this time mounted
directly off the vertical post, once again much like a Standard model.
The sides of the snowplows were also updated with welded
construction and now had journal access doors. Even later model Type
As had the Front Cab, with all around visibility, and also some
received compressors on the back rear deck. Late model Type As also
used a larger air cylder and a solid rod to raise or lower the bank
sloper.
SPMW 4037, a straight wing unit. SP added the extended rear decking. 4037 is now CORP MoW #3. From the collection of John C. LaRue Jr.
Standard Options
The Type A Spreader had many of the same options as previous
models. These include the Ditch Casting. These could be custom made
for each railroad and were mounted in the wing. Wings could be
either the straight, or the articulated ones, depending on which the
railroad wanted. The braces that held the wings open were of the same
style of the Standard series but different sizes. some have the hydraulic ones.
