TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 3–26 Change 2 3–3 TROUBLESHOOTING CHART — CONTINUED b. CANNON — CONTINUED (5) PRIMER DOES NOT FIRE. — CONTINUED 1. Perform misfire procedures (TM 9–2350–311–10). 2. Remove firing mechanism (TM 9–2350–311–10). 3. Remove and check thread inside obturator spindle nut for cross-threading caused by carbon deposits (para 5–7). Is obturator spindle nut cross threaded? Attempt to fire (TM 9–2350–311–10). If primer does not fire, is it indented? CONTINUED FROM STEP B C yes no Notify chief of section or chief of firing battery for further instructions. CONTINUED ON NEXT PAGE D 1. Replace obturator spindle nut (para 5–7). 2. Install firing mechanism (TM 9–2350–311–10). 3. Attempt to fire (TM 9–2350–311–10). Does primer fire? E yes no Go to step F.