TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 2-17. M115 PANORAMIC TELESCOPE FINAL INSPECTION INSTRUCTIONS (CONT). COLLIMATION (CONT) 4 Loosen three screws (9) and position micrometer (10) so that index (11) points to "0". Tighten three screws (9). 5 Loosen two screws (12) and position open sight (8) to "0". Tighten two screws (12). 6 Check that deflection counter (13) registers 3200 mils. If not, go to step 7. 7 Remove cap (14) and insert screwdriver into slotted key (15). 8 Push in and rotate screwdriver until deflection counter registers 3200 mils. 9 Install cap (14). 10 Rotate reset counter knob (16) until reset counter (17) registers 3200 mils. PLUMB TRAVEL AND LINE OF SIGHT TRAVEL 1 Collimate telescope. Refer to page 2-69. 2 Suspend plumbline to one side of azimuth testing fixture (1). 3 Rotate deflection knob (2) to sight onto plumbline. 4 Install a parallax shield in eyepiece (3). 5 Place a mark on wall behind plumbline, intersecting reticle line. 2-70