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 266 of 828

TM 9–2350–311–20–2

5–10

5–5

FIRING BLOCK ASSEMBLY AND FOLLOWER ASSEMBLY — CONTINUED

b.

Assembly

NOTE

Step 1 pertains to the M284 cannon only.

1

Install shaft roller (11) and shoulder screw (10) on follower shaft (12). Install new spring pin (9) into follower

shaft.

2

Install follower assembly (7), spring (6), and knob (5) in firing block (8).

3

Install new spring pin (4).

4

Install spring (3) and firing pin (1).

5

Install lock pin (2) over firing pin (1).

M284 CANNON CONFIGURATION

M185 CANNON CONFIGURATION

4

5

1

3

8

10

11

9

12

6

4

5

6

7

2

3

8

1

2

7