TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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TM 9-2350-311-10 b. Procedure Number 2, M501 Series Fuze - Continued 5-6 FUZE SETTING -CONTINUED 2 Impact setting. Impact functioning of the M501 series MTSQ fuze may be obtained by leaving the S (shipping mark) alined with the index mark on the base. The safety wire must be removed (pull free end of safety wire off and out of hole) before firing or setting the M501 series fuze. 5-53