to Publications) and forwarded direct to Commanding
General, U.S. Army Mobility Equipment Command,
a. These instructions are published for the use of
ATTN: AMSME-MPP, 4300 Goodfellow Boulevard, St.
the personnel to whom the Secondary Crushing and
Screening Plant is issued. They provide in- formation on
the operation and organizational maintenance of the
recommendations as prescribed by TM 38-750.
equipment. Also included are descriptions of main units
1-2. Record and Report Forms
and their functions in relationship to other components.
b. Refer to TM 740-90-1 (Administrative Storage of
Equipment) for information and instructions pertaining to
Depreservation Guide of Engineer Equipment).
b. For other record and report forms applicable to
organizational administrative storage.
c. Refer to TM 750-244-3 (Procedures for
operator, crew and organizational maintenance, refer to
Destruction of Equipment to Prevent Enemy Use) for
information and instructions on destruction of equipment
to prevent enemy use.
recommendations for improving this publication by the
individual user is encouraged.
Reports should be
submitted on DA Form 2028 (Recommended Changes
Section II. DESCRIPTION AND DATA
cables to receive electric current for the lamps from the
prime mover. Clutches for the unit and components are
a. The model 2A-2B Crushing and Screening Unit
controlled by the operator from the walkway and ladder.
is a highly mobile self-contained component of the Iowa
In this manual the terms "left" and "right" will vary. Right
Model 2A2, 35 TPH Crushing and Screening Plant. It
and left on the roll crusher will be determined by facing
can headily be moved and produces material under the
the countershaft, on conveyors by facing the direction of
most severe conditions.
material flow and on the vibrating screen by standing at
b. The crusher screening unit is used for the
the intake end facing the direction of material flow. To
production of crushed rock and gravel to a finished
determine right and left side of unit stand at rear of unit
produce to surface, maintain and repair military roads. It
is also used to produce aggregate for the preparation of
1-4. Identification and Data
bituminous surfaces and concrete work.
a. Identification. The Crusher and Screening Unit
c. This unit consists of a fed conveyor, vibrating
has 5 major identification plates. These plates are
screen, screen hopper, double roll secondary crusher,
and a return system consisting of roll conveyor and
elevating wheel, two side delivery conveyors, one
Table 1-1. Information Plates
forgraded material, and one for sand or undersize
material, and a Detroit Diesel Engine power unit.
d. The Crushing and Screening Unit is powered by
Frame Below Engine-Left Side
four cylinder, 2 cycle 71 Series engine having a
Plate-Tie Down Date
Frame Below Engine-Left Side
compression ratio of 17 to 1 and a total displacement of
Plate-Warning-Tighten Frame Bwlow Elev. Wheel-
284 cubic inches.
e. The unit is trailer mounted using 16.5 x 22.5, 16
Plate-Warning-Replace Vibrating Screen-Left Side
ply tires with air controlled brakes on all wheels. The
rear wheels are mounted on tandem oscillating beams
Plate-Battery Cable Hook Frame Below Engine-Right
with a rigid main axle. The unit is provided with a Brown
Trailer Division, Model CD-H1 removable dolly furnished
with safety marker lamp, both service and blackout,
reflectors, two wheels, tire size 16.5 x 22.5 16 ply. The
dolly is fitted with coupling sockets and connecting