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 645 of 828

TM 9–2350–311–20–2

17–7

5

Install adapter (5) in inlet port (6) and adapter (9) in outlet port (10) of M3 electrical air heater (2).

NOTE

•

Lockwashers (13) should be installed between mounting block and M3 electrical air heater.

•

Install a washer and retaining strap with cannoneer no. 1’s M3 electrical air heater. Reinstall a

retaining strap with section chief’s M3 electrical air heater.

6

Install M3 electrical air heater (2) on cab ceiling using four new lockwashers (13), four new lockwashers

(12), and four cap screws (11).

7

Connect hose (8) from orifice connector to outlet port (10) of M3 electrical air heater (2) and hose clamp (7).

8

Connect hose (4) from M2A2 air purifier to the inlet port (6) and tighten hose clamp (3).

9

Plug NBC power lead assembly (1) into M3 electrical air heater (2).

1

6

3

4

8

7

13

12

11

5

9

2

6

10

10

2