CHAPTER 1 INTRODUCTION - TM-5-4310-340-240004

TM 5-4310-340-24

CHAPTER 1

INTRODUCTION

SECTION I. GENERAL

1-2. Forms and Records

1-1. Scope

a. This manual is prepared for the information and

Maintenance forms, records. and reports which are to be

guidance of organizational, direct support, and general

used by maintenance personnel at all maintenance levels are

support personnel responsible for maintenance and repair of

listed in and prescribed by TM 38-750.

the 3,000 psi 6 cfm Compressor Assembly, Part Number

894780. It is complementary to TM 9-2350-232-20 and TM

1-3. Reporting of Errors

92350-232-34.

Report of errors.

omissions, and recommendations for

b. Appendix A lists references pertaining to the air

improving this publication by the individual user is

compressor.

encouraged. Reports should be submitted on DA Form

2028, Recommended

Changes to Publications. and

c. Appendix B

contains the maintenance allocation

forwarded direct to: Commanding Officer, U. S. Army

chart.

Mobility Equipment Command. ATTN: AMSME-MPP. 4300

Goodfellow Blvd., St. Louis, Mo. 631(66.

d. Appendix C lists repair parts and special tools

through depot maintenance level.

Section II. DESCRIPTION AND DATA

negative (evacuated) dependent upon whether the pneumatic

1-4. Description

system is located upstream or downstream of the

compressor. The compressor in this manual is used to

a. General. The compressor assembly (fig C-l I is a

pressurize the pneumatic system.

component of the closed breech scavenge system used on the

M60A2 tank. The system provides compressed air for

c. Operation. The compressor compresses ambient

cleaning the gun / launcher of any ignited powder or powder

air to the operating pressure of 3,000 psi with a flow rate of

bag particles prior to opening the breech.

6.0 scfm. In order to supply this compressed air. the

compressor drive rotates the compressor in a clockwise

NOTE

direction (facing fan at a rated speed of 4,250 to 4,450 rpm.

For purposes of orientation. the compressor

The compressed air flow from one compression stage to the

mounting adapter end %will be called the rear

next passes through relief valves and intercoolers up to the

and the fan end will be called the front The term

fourth compressor stage. From the fourth stage. the

left or right as used will be referenced to the

compressed air flow (fig 1-1 I is directed through an air flow

compressor as viewed front the front looking to

restrictor fitting to a high pressure relief valve and to the

the rear.

aftercooler and compressor outlet (discharge) fitting. From

the compressor outlet (discharge) fitting, the compressed air

b. Theory of Operation. In a pneumatic system.

flow is directed to the air processing assemblies in the

changing the value of a given quantity of air (under ambient

pneumatic system, then to the using equipment. The hot,

conditions) results in a change in pressure. temperature. and

high pressure compressed air. when passing through the

vapor content characteristics. The change in pressure is

finned intercoolers and aftercoolers, loses the heat of

directly proportional to the change in volume. The change in

compression to the ambient air. To increase the heat transfer

temperature is directly related to the change in pressure. The

rate. the compressor fan forces the ambient air past the

vapor content of a given volume of air is directly dependent on

finned cooler surfaces. Excessive interstage or pneumatic

the temperature and inversely dependent on the pressure.

system pressure is

The compressor assembly is part of a pneumatic system.

The function of the compressor in the pneumatic system is to

change the air volume. Air volume change in a pneumatic

system can be positive (pressurized) or

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