4-15. LEVEL ASSEMBLY MAINTENANCE INSTRUCTIONS - continued
d. Assembly - continued
14 If removed, press headless straight pin (9) into
bracket (7) so that the headless straight pin pro-
trudes far enough into the cross-level (6) hole to
engage cross-level (6).
15 Position cover (8) into bracket (7) and slide cross-
Ievel (6) into position so the slot in the end of the
cross-level (6) engages headless straight pin (9).
16 Install cell (5) and secure with threaded ring (4),
using fabricated eccentric tool. Do not tighten
threaded ring (4) at this time.
Position contact wires in the grooves of the
level assembly. Check to ensure wires are not
pinched between the M145/M145A1 telescope
mount and level assembly during installation.
1 If removed, install two headless straight pins (3).
2 Mount level assembly(1) and secure with two cap
3 Level gun tube (TM 9-2350-31110 or
Loosen threaded rings (4 and 17) using fabricated
Place 1/2- by 3/4-by 6-inch parallel baron bear-
ing plate in telescope socket (35) so that it is at
right angle to main shaft (36).
Place zeroed M1A1 gunner's quadrant (37) on par-
Adjust pitch knob until gunner's quadrant (37) level
(38) bubble is centered.
Apply sealing compound (item 15, appx B) to
threaded ring (17) and install threaded ring into