TM 5-6675-328-14
(9)
Tilt TI to view reticle of AS-2 in upper tube.
(10)
Focus AS-2 on infinity by inserting screwdriver through left-hand hole of angled tube and rotating focusing screw
fully to left. Rotate focusing screw to right until filar-bifilar reticle image is observed to be sharp when viewed through TI.
(11) Rotate AS-2 to make reticle image parallel to TI reticle image.
(12)
Bring AS-2 reticle into register using AS-2 mounting adjustment screws.
(13)
Reverse theodolite 180° on its mount and plunge to reverse vertical axis of TI telescope.
(14)
Aline TI reticle to TC reticle in lower tube.
(15) Tilt to AS-2 in upper tube.
(16)
Correct one quarter of the error by adjusting upper tube mounting screws.
(17)
Tilt to MTC in center tube.
(18)
Bring reticles into register with horizontal tangent screw of TI.
(19)
Repeat steps (13) thru (18) until all error is removed.
(20)
Turn rotating index table 180 to right.
NOTE
If necessary, focus AS-1 on infinity using stellite mirror.
(21)
Bring reticle images of TI and AS-1 into register by using mounting base tangent screws. If range of tangent
screws is not adequate for adjustment, proceed as follows:
(a)
Adjust tangent screws to midrange of thread travel.
(b)
Loosen two setscrews holding upper section of 88-6 mounting base to mounting plate.
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