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 121 of 828

TM 9–2350–311–20–2

3–12

Change 2

3–3

TROUBLESHOOTING CHART — CONTINUED

a.

BREECH MECHANISM — CONTINUED

(3)

BREECH DOES NOT OPEN AUTOMATICALLY

AFTER FIRING. — CONTINUED

Remove and inspect torque key for wear (para 5–10).

Is the torque key worn beyond 31/32 inch (24.6 mm) on

M185 cannon or 1–9/16 inches (3.97 cm) on M284

cannon?

D

Replace torque key

(para 5–10).

Verify fault is corrected.

Continue normal opera-

tions.

yes

no

CONTINUED FROM STEP C

Notify support mainte-

nance.

END OF TASK