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 Interval Before Table 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M109 SELF-PROPELLED HOWITZER — CONTINUED Location Item to Check/ Service M118A2/M118A3 Elbow Telescope (M118 Series) (Cont) Crewmember Procedure ASSISTANT GUNNNER b. Check level vial (3), making sure it is legible and free of cracks or breaks. Check to see that knobs (4) move freely and level vial mirror (5) is not scratched. Ensure that variable resistor knob (6) moves freely and that light goes from dim to bright and from bright to dim. Not Fully Mission Capable If: 2-49