TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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3-4 TM 9-1240-401-34&P 3-6. INITIAL INSPECTION M118A2/M118A3 ELBOW TELESCOPE Item No. Item To Be Inspected Procedures 1 M118A2/M118A3 ELBOW Inspect M118A2/M118A3 elbow telescope (1) for completeness and TELESCOPE secureness of parts. 2 IDENTIFICATION PLATE Check that print on identification plate (2) is legible and clearly defined. 3 MOUNTING SURFACE Check that mounting surface (3) is free of burrs and corrosion. 4 EYESHIELD Inspect eyeshield (4) for security of attachment and damage such as deterioration, cuts, or tears. 5 VALVE CORE AND Inspect valve core and air valve cap (5) for damage such as bends AIR VALVE CAP or breaks and ability to hold pressure. 6 OPTICS Inspect optics (6) for dirt, fungus, scratches, chips or condensation, which may obstruct view through eyepiece. Inspect view through telescope to determine if interfering fractures exist on window, lens, prisms, or reticle; chipped, scratched, or pitted optics that interfere with field of view must be replaced. 7 RETICLE Check reticle (7) for clarity and illumination. 8 LEVEL ASSEMBLY Check that level (8) is free of cracks and breaks and that graduations are legible. Check that mirror (9) on level assembly is not scratched. 9 WORMSHAFT ASSEMBLY Check that knobs on wormshaft assembly (10) move freely without binding or excess torque. 10 VARIABLE RESISTOR Check that variable resistor knob (11) moves freely and that light changes from dim to bright and bright to dim.