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 514 of 828

TM 9–2350–311–20–2

9–12

Change 2

9–3

ELECTRICAL CONTACT ARM ASSEMBLY — CONTINUED

c.

Assembly

— Continued

5

Install two non-metallic grommets (26) on mechanical drive guard (22). Install terminal board (14) on

mechanical drive guard (22) using two cap screws (24) and two new lockwashers (25).

6

Install electrical holder assembly (23) in mechanical drive guard (22). Insert two electrical contact brush

leads (12) and two ground electrical contact brush leads (18) through non-metallic grommets (26) and

secure two angle brackets (21) with four cap screws (19) and four new lockwashers (20).

7

Attach two ground straps (1) (if present) and two ground electrical contact brush leads (18) to mechanical

drive guard (22) using two cap screws (15), two new lockwashers (16), and two new lockwashers (17).

d.

Installation

NOTE

Adjust electrical contact arms after installation (para 9–3f.).

1

Attach two electrical contact brush leads (12) and wire 100 (13) to terminal board (14) using new lockwasher

(11) and hex nut (10).

26

25

24

25

24

22

26

14

21

19

20

15

16

17

18

12

11

10

23

14

13

1

5

22

1

12

18