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 644 of 828

TM 9–2350–311–20–2

17–6

17–2 M3 ELECTRICAL AIR HEATER — CONTINUED

d.

Installation

WARNING

Turn CAB POWER and MASTER switches to OFF before connecting electrical leads to avoid elec-

trical shock and burn.

NOTE

M3 electrical air heaters at all stations except the section chief’s must have heater kit assembled to

them. Perform steps 1 through 4 to assemble kit. Section chief’s M3 electrical air heater does not

need the kit applied; proceed to step 5.

1

Remove four screws (18), control unit (19), and plate mount (20) from heater unit (21) and set aside.

2

Position angle bracket (22) on heater unit clamp (23) so outlet port (10) is to the right of the angle of the an-

gle bracket. Secure using four screws (24).

3

Aline three holes on plate mount (20) with three holes on angle bracket (22) and install screw (25) in center

hole.

4

Secure control unit (19) to plate mount (20) using four screws (18).

24

22

20

25

18

21

23

19

10