TM 5-4310-373-14
INTRODUCTION
Section I. GENERAL INFORMATION
1-1.
1-8.
SCOPE. This manual is for your use in operating
CAPABILITIES AND FEATURES.
and maintaining the model 20-912 air compressor unit.
2 stage compressor provides compressed air at
15 cfm and 175 psi
ventive maintenance services, and operator's maintenance
of equipment, accessories, components and attachments.
Electric motor driven
Motor starter with thermal relay protects motor
the Organizational, Direct and General Support levels.
against overload
Pressure switch provides for automatic com-
Also included are descriptions of all components.
pressor cut-in at 160 psi and cut-out at 180
MAINTENANCE FORMS AND RECORDS. Equip-
1-2.
psi
ment maintenance forms and procedures for their use are
Two safety relief valves to prevent damage to
contained in TM 38-750, The Army Maintenance Manage-
compressor and injury to personnel.
ment System (TAMMS).
Air discharge system with inflator gage can be
used to directly inflate tires to proper pressure
REPORTING EQUIPMENT IMPROVEMENT
1-3.
Tank mounted pressure gage gives constant
RECOMMENDATIONS (ElR'S). ElR can and must be
reading of air pressure in tank
submitted by anyone who is aware of an unsatisfactory
condition with the equipment design or use. It is not
NOTE
necessary to show a new design or Iist a better way to
perform a procedure, just simply tell why the design is
To help you find components and eliminate con-
unfavorable or why a procedure is difficult. ElR may be
fusion, certain overall views of the air compressor
submitted on SF 368 (Quality Deficiency Report). Instruc-
unit will be called Belt Guard View and Starter
tions for preparing ElR'S are provided in TM 38-750, The
View instead of "front" or "rear."
Army Maintenance Managements System. Mail directly to
Commander, Headquarters, U.S. Army Troop Support and
The component parts of the air compressor unit
Aviation Material Readiness Command, ATTN: DRSTS-
will be referred to by their proper names, eg.
MPSD, 4300 Goodfellow Blvd., St. Louis, MO 63120. A
"electric motor" refers only to the electric motor.
reply will be furnished directly to you.
1-9.
LOCATION AND DESCRIPTION OF MOTOR
HAND RECEIPT. Hand receipts for Components of
1-4.
COMPONENTS. (Figures 1-1 and 1-2.)
End Item (COEI), Basic Issue Items (BIl), and Additional
Authorization List (AAL) items are published to aid in
PRESSURE SWITCH (1). Diaphragm senses pressure and
property accountability and is available through: Com-
opens and closes switch contacts. Cut-out pressure and
mander, US Army Adjutant General, 2800 Eastern Blvd.,
pressure difference between cut-in and cut-out are adjust-
Baltimore, MD 21220.
able with 2 screws.
WARRANTY INFORMATION. All components of
1-5.
MOTOR STARTER (2). Contacts are magnetically closed
the Air Compressor Unit are warranted by C & H Distribu-
when power is applied. Also contains a thermal or melting
tors Inc. for a period of 12 months. The warranty starts on
relay which opens the circuit when a current overload is
the date found in block 23, DA Form 2408-9, in the log-
sensed.
book. Report all defects in material or workmanship to
your supervisor who will take appropriate action through
BELT GUARD (3). Steel mesh and sheet metal construc-
your organizational maintenance shop.
tion protects belts and personnel.
Destruction of army material to prevent enemy use.
1-6.
COMPRESSOR (4). Dual stage, two piston, air cooled with
Refer to TM 750-244-3.
15 cfm capacity. Includes interstage safety valve, inter-
cooler, aftercooler and air inlet filter as well as centrifugal
unloader for no load starting.
Section II. EQUIPMENT DESCRIPTION
ELECTRIC MOTOR (5). Three phase, 5 HP induction
1-7.
PURPOSE OF THE AIR COMPRESSOR UNIT. An
motor.
electric motor driven compressor for general shop use.
