OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER

Appendix III
Alignment of 16-inch Sight, Mark 4 and Mark 1.;., Mod. 1
1. The following procedure is recommended for use in aligning the
subject sights after installation aboard ship, which is assumed to be in
dock.
(a) Determine tilt of axis of trunnions of center gun with reference
to the true horizontal plane.
(b) With the sight telescope removed from the holder bearings,
adjust position of the telescope holder (231639-1, 231659-1)
in deflection to bring the center line of the telescope
bearings in the holder into alignment with the axis of
rotation of the elevation bracket (231646-1, 2; 231668-1)
so that the two are coaxial.
(c) Align sight station assembly in a vertical plane to bring
the axis of rotation of the elevation bracket parallel to
the center line of the gun trunnions. Shim bearing pads
of the pedestal (231656~1, 2; 231666-1, 2) and housing
(231661-1, 231655-1, 2) as required.
(d) Rotate elevation bracket in its bearings (about the horizontal
axis of rotation) so that the axis of telescope
bracket trunnions' lies in a vertical plane. This is the
position for zero elevation of line of sight.
(e) Clamp operating shafts to prevent any change in alignment
before dials are set.
(f) Place telescope in its bracket.
(g) Loosen holding down bolts for the pedestal and housing.
Adjust the complete station assembly, sliding the pedestal
and housing on their respective bearing pads so that the
horizontal coaxial center lines of the elevation bracket
. and telescope are parallel to the axis of the gun trunnions.
This adjustment can be made by bringing the line of sight
of the telescope to bear in azimuth upon the designated
outside bore sight target. Care should be taken to see that
no undue strain or binding action is placed on shafting
or gears as a result of the foregoing operations. Adjustment
should not be made by attempting to reset the telescope
bracket alone. This will disturb the alignment resulting
from the adjustments of iteml(b) and will introduce
reflection errors later on when the sightis put into
use. Tighten bolts and dowel parts as required.
(395)