TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 Change 2 3–25 b. CANNON — CONTINUED (5) PRIMER DOES NOT FIRE. INITIAL SETUP Tools Artillery and turret mechanic’s tool kit (SC 5180–95–CL–A12) References TM 9–2350–311–10 1. Install firing pin (TM 9–2350–311–10). 2. Disassemble firing mechanism and replace unserviceable parts (para 5–2 or 5–3). 3. Reassemble firing mechanism (para 5–2 or 5–3). 4. Install and test firing mechanism (TM 9–2350–311–10). Does firing mechanism function properly? 1. Remove firing mechanism (TM 9–2350–311–10). 2. Remove firing pin and inspect it for mushrooming, breakage, or burrs (TM 9–2350–311–10). 3. Inspect firing pin functioning orifice at the obturator for powder fouling (burned-on carbon deposits that may restrict firing pin movement) (TM 9–2350–311–10). Are burned-on carbon deposits that may restrict firing pin movement present or is firing pin damaged? Follow misfire instructions before opening breechblock (TM 9–2350–311–10). A yes no Clean restricted firing pin (TM 9–2530–311–10). Replace firing pin as nec- essary and verify fault is corrected. B CONTINUED ON NEXT PAGE yes no Replace firing mechanism (TM 9–2350–311–10) and verify fault is corrected. WARNING