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 641 of 828

TM 9–2350–311–20–2
17–3
17–2 M3 ELECTRICAL AIR HEATER
This task covers:
a.
Removal
b.
Disassembly
c.
Assembly
d.
Installation
INITIAL SETUP
Applicable Configuration
M109A4/M109A5 howitzers
Tools
Artillery and turret mechanic’s tool kit
(SC 5180–95–CL–A12)
Materials/Parts
Lockwashers (4) (item 79, Appx G)
Lockwashers (4) (item 64, Appx G)
Equipment Condition
CAB POWER switch to OFF (TM 9–2350–311–10)
Vehicle MASTER switch to OFF (TM 9–2350–311–10)
a.
Removal
NOTE
This procedure is written for one M3 electrical air heater, but applies to all four.
There are two types of M3 electrical air heaters with different outlet port configurations. Note the
outlet port position when replacing M3 electrical air heater.
1
Disconnect NBC power lead assembly (1) from M3 electrical air heater (2).
1
2


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