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 137 of 828

TM 9–2350–311–20–2

3–28

Change 2

3–3

TROUBLESHOOTING CHART — CONTINUED

b.

CANNON — CONTINUED

(6)

CAB FILLS WITH SMOKE OR GASES AFTER

FIRING.

INITIAL SETUP

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

References

TM 9–2350–311–10

Inspect obturator pad for serviceability

(TM 9–2350–311–10).

Is obturator pad serviceable?

Inspect and clean bore evacuator, bearing balls,

orifices, and valve rings for serviceablity

(TM 9–2350–311–10).

Are parts serviceable?

A

yes

no

Replace defective parts

(TM 9–2350–311–10).

B

yes

no

Fire cannon in accordance with

TM 9–2350–311–10.

Does smoke or gases fill cab after firing?

C

Replace obturator pad

(para 5–7).

Verify fault is corrected.

Continue normal opera-

tions.

yes

no

Notify support

maintenance.

END OF TASK