TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
Page 172 of 344
TM 9-1240-401-34&P 4-24. M145/M145A1 TELESCOPE MOUNT FINAL INSPECTION AND ADJUSTMENT - continued h. PITCH LEVEL VIAL ADJUSTMENT-continued 6 Engage fabricated eccentric tool (fig. C-3, appx C) to the threaded ring (8). 7 Insert a common straight blade screwdriver through the center hole in fabricated eccentric tool (fig. C-3, appx C) and engage cell (9). 8 Adjust cell (9) until the pitch level (10) bubble is centered within the graduations on the pitch level (10). 9 Hold cell (9) firmly in place while turning fabricated eccentric tool (fig. C-3, appx C) to tighten threaded ring (8). Be level (10). careful not to disturb the setting of pitch i. CHECKING ELEVATION HANDWHEEL RUNNING TORQUE 1 With torque wrench (Item 36, appx F) and adapter (8599922) (Item 8, appx F), rotate elevation hand- wheel (1) one turn clockwise and one turn counter- clockwise. 2 Measure the torque required to turn elevation handwheel (1). The torque must be between 8 and 12 pound-inches (0.904 and 1.356 N-m). If not, repair according to repair procedure (ref. para 4-16). 4-58