TM-9-2350-358-BD
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6
TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE
MARCH 1994
TM-9-2350-358-BD - Page 292 of 343
TM 9-2350-358-BD
CHAPTER 14
AUXILIARY EQUIPMENT
BDAR FIXES SHALL BE USED ONLY IN COMBAT OR FOR TRAINING
AT THE DISCRETION OF THE COMMANDER.
(AUTHORIZED TRAINING FIXES ARE LISTED IN APPENDIX E.)
IN EITHER CASE, DAMAGES SHALL BE REPAIRED BY STANDARD
MAINTENANCE PROCEDURES AS SOON AS PRACTICABLE.
SECTION I.
INTRODUCTION
14-1.
SCOPE
This chapter contains fault assessment and repair procedures available to find and fix battlefield damage to equipment
other than that needed for howitzer mobility
14-2.
ASSESSMENT PROCEDURE
There is no specific assessment procedure for auxiliary equipment.
Refer to the Repair Procedure Index (para 14-3) for
available BDAR fixes
14-3.
REPAIR PROCEDURE INDEX
PARA
Microclimate Conditioning System (MCS)
Section II
MCS Control Box Defective.
.........................................................................................................................
14-5
MCS Circuit Breakers Defective.
..................................................................................................................
14-6
MCS M3 Heater Defective.
...........................................................................................................................
14-7
MCS Air Duct Hoses and Air Pipe Perforate .
...............................................................................................
14-8
MCS Compressor/Motor V-Belt Damaged .
..................................................................................................
14-9
Personnel Heater
Section III
In-Line Filter Element Clogged.
..................................................................................................................
14-11
Fuel Pump Filter Clogged.
..........................................................................................................................
14-12
Personnel Heater Fuel Line Damaged .
......................................................................................................
14-13
Lead Filter System
Section IV
Accessory Control Box .
..............................................................................................................................
14-15
SECTION II.
MICROCLIMATE CONDITIONING SYSTEM (MCS)
14-4.
GENERAL
The MCS system provides decontaminated, conditioned air supply for crewmen operating under Nuclear, Biological, and
Chemical conditions.
Failure of the MCS will result in contaminated air.
14-5.
MCS CONTROL BOX DEFECTIVE
General Information:
The control box contains a four position multi-ganged switch which permits choosing HIGH or LOW volume air flow from
the blower motor and turns the compressor motor and the vaneaxial fan ON or OFF.
The only BDAR fix for the switch is
replacement.
For replacement of defective switch, see Chapter 3, "Switches Damaged".
14-1
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