4-24. M145/M145A1 TELESCOPE MOUNT FINAL INSPECTION AND ADJUSTMENT
e. CROSS-LEVEL ADJUSTMENT
1 Install M117/M117A2 panoramic telescope (1) in
M145/M145A1 telescope mount (ref.
T M 9-2350-11-10 or TM 9-2350-314-10).
With cross-leveling fixture (3) leveled in elevation
and cross-level, aline reticle of M117/M117A2
panoramic telescope (1) with plumbline.
Elevate and depress cross-leveling fixture (3), as
required, between -50 mils and 1333 mils while
tracking plumb line.
Adjust cross-level knob (4) and repeat steps 2 and
3 until M117/M117A2 panoramic telescope (1)
tracks plumb line throughout complete excursion
within 0.5 mil.
Engage fabricated eccentric tool (fig. C-2, appx C)
to threaded ring (5).
Insert a common straight blade screwdriver
through center hole in fabricated eccentric tool and
engage cell (6).
Adjust cell (6) until cross-level (7) bubble is cen-
tered within graduations on the cross-level (7).
Hold cell (6) firmly in place while turning fabricated
eccentric tool (fig. C-2, appx C) to tighten
threaded ring (5). Be careful not to disturb setting
of cross-level (7).
Loosen two screws (8).
Rotate indicator (9) to aline scribe marks.
Tighten two screws (8).