TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 3-5. CATEGORIES OF INSPECTION (CONT). c. Table 3-1 lists initial inspection procedures for the M139 elbow telescope. Final inspection procedures are located on page 3-18. d. Preembarkation inspection procedures are located on page 3-29. Table 3-1. INITIAL INSPECTION-M139 ELBOW TELESCOPE Item No. Item To be Inspected Procedure 1 M139 Elbow Telescope Inspect for signs of mistreatment, such as dents, scuff marks, bare spots, and missing parts Check for collimation and foreign matter Refer to p 3-24. 2 Eyepiece Assembly Check for moisture and foreign matter Look for broken, cracked, or chipped glass. 3 Reticle Cell Assembly Check for moisture and foreign matter and that reticle is illuminated when M36 instrument light is attached. 4 Cover Assembly Check that cover assembly is secure and plate is legible. 5 Objective Cell Assembly Check for moisture and foreign matter, and that parallax does not exceed 0.1 mil at 125 meters. 6 Eyeshield Check for cracks, splits, and rubber deterioration. 3-2 3-2