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