TM-9-2350-311-20-2
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS
DECEMBER 1993
TM-9-2350-311-20-2 - Page 639 of 828
TM 9–2350–311–20–2
17–1
CHAPTER 17
NUCLEAR, BIOLOGICAL, AND CHEMICAL (NBC) PROTECTION EQUIPMENT
GENERAL
This chapter describes unit maintenance procedures for NBC system on M109A4/M109A5 howitzers. Removal, disas-
sembly, assembly, installation, repair, inspection, and testing procedures are included. NBC power lead assembly and
ground lead maintenance is located in Chapter 8, Cab Electrical System. A general inspection is provided for all applicable
parts.
CONTENTS
Page
17–1
GENERAL INSPECTION AND REPAIR PROCEDURES.
17–2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17–2
M3 ELECTRICAL AIR HEATER
17–3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17–3
M2A2 AIR PURIFIER AND BRACKET
17–8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17–4
NBC CONTROL BOX ASSEMBLY
17–13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17–5
HOSES AND FITTINGS
17–19
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17–6
AIR OUTLET ORIFICE CONNECTOR
17–28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M3 ELECTRICAL AIR HEATER
M2A2 AIR PURIFIER
NBC CONTROL
BOX ASSEMBLY
M3 ELECTRICAL AIR HEATER
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