Section I. GENERAL
2028 (Recommended Changes to Publications) and
forwarded direct to Commanding General, U.S. Army
a. These instructions are published for the use of the
Mobility Equipment Command, ATTN: AMSME-MPP,
personnel to whom the primary crusher jaw unit is
4300 Goodfellow Boulevard, St. Louis Mo. 63120.
issued. They provide information on the operation and
e. Report all equipment improvement recom-
organizational maintenance of the equipment. Also
mendations as prescribed by TM 38-750.
included are descriptions of main units and their
functions in relationship to other components.
b. Refer to TM 740-90-1 (Administrative Storage of
1-2. Record and Report Forms
a. DA Form 2258 (Depreservation Guide for Engineer
Equipment), for information and instructions pertaining to
organizational administrative storage.
c. Refer to TM 750-244-3 (Procedures for Destruction
b. For other record and report forms applicable to
of Equipment to Prevent Enemy Use), for information
operator, crew and organizational maintenance, refer to
and instructions on destruction of equipment to prevent
d. Report errors, omissions, and recommendations for
improving this publication by the individual user in
encouraged. Reports should be submitted on DA Form
II. DESCRIPTION AND DATA
determine the right and left side of the plant, stand at
rear of unit looking forward.
a. The model 2A-2A jaw crusher plant coupled with the
1-4. Difference Between Models
crushing and screening plant provides a complete self
contained and highly mobile crushing and screening unit
The manual covers only the Iowa Manufacturing Co.
capable of producing material under the most severe
Model 2A-2A jaw crusher. No known unit differences
b. The plant is used for the production of crushed rock
exist for the model covered by this manual.
and gravel to surface, maintain and repair military roads.
c. The unit consists of a feeder hopper, reciprocating
1-5. Identification and Data
feeder, jaw crusher, delivery conveyor and a diesel
a. Identification. The primary jaw crusher plant has 4
d. The unit is trailer mounted using 16.5 x 22.5, 16 ply
major identification plates. The location of these plates
tires with air controlled brakes on all wheels. The rear
wheels are mounted on tandem oscillating beams with a
Table 1-1. Information Plates
ridged main axle. The jaw crusher is provided with a
removable dolly, furnished with safety marker lamps,
both service and blackout, and reflectors. The dolly is
fitted with coupling sockets and connecting cable to
Frame, right side
receive electric current for the lamps from the prime
Plate, tie down data
Frame, Right side
mover. Clutches for the plant are controlled by the
Plate, warning (feeder)
feeder, frame, left side
operator from the walkway. In this manual right and left
Plate, battery cable hookup
Frame, right side
will vary. Right and left on the jaw crusher will be
determined by facing the adjusting spring and on
conveyors by facing the direction of material flow. To