The most distinguishing feature of the 5623 and other "torpedo boats" is the cluster of air tanks on the top of the long hood. The top of the short hood is also unusually cluttered with the various steam generator fixtures and the radio antennas.
This is the rear of the long hood, looking
The square lid at the extreme end is the rear sand box filler and the
sticking up on the right side is the vent for the engine cooling
Note that on early GP9's, there are two 36" cooling fans at the rear
two more behind the cab. The two engine exhaust stacks stick up between
the inner tanks.
The top of the short hood is covered with
On the left, under the "wagon wheel" radio antenna, is the air intake
the steam generator. Ahead of that, is the generator exhaust. To the
of the air intake are the generator safety valve pipes. The cylindrical
object in the center is the antenna for the telemetry receiver and the
small wire antenna to its right rear is for the secondary radio. Again,
the sand box filler occupies the extreme end, right behind the red
On the left is a view of the front sand box
It would appear to be right off the EMD part shelf for plain bearing
journal box lids. It is embossed, "NATIONAL FLEXO-4 AAR-1947" and is
to the covers found on the OTR's GP7, #97, pictured to the right.
This view is of the radiators under the front
fans. These two leaking cores had to be replaced. Behind them, under
tanks, can be seen the tops of the twin air cleaner housings. This view
is presented to show the relationship of the fans to the radiators on
early EMD hood units. This little adventure in parts removal is covered
in the "Repairs" section.