d. Adjustment. If the leveling screw does
move burs. Replace parts damaged beyond
repair with serviceable parts.
not turn smoothly, adjust the pressure by
turning the adjusting screw (4, fig. 8).
c. Reassemble and Installation.
(1) Refer to figure 9 and reassemble and
45. Optical Plumbing Objective Assembly,
install the optical plumbing objective,
Plum m e t Eyepiece Assembly, and
eyepiece, and reticle assemblies on the
Re t ic le Assembly
tribrach.
(2) Install the base plate assembly (para
a. Removal and Disassembly.
(1) Remove the base plate assembly from
the tribrach (para 43).
4 6 . Circ ula r Le ve l
(2) Refer to figure 9 and remove and dis-
a. Removal and Disassembly.
assemble the optical plumbing objec-
(1) Remove the base plate assembly (para
tive, eyepiece, and reticle assemblies.
43).
b. Repair. Straighten minor bends and re-
(2) Refer to figure 10, callouts 1 through
7, and remove and disassemble the
circular level.
b. Repair and Replacement. Remove all burs
and straighten minor bends. Replace parts
damaged beyond repair with serviceable parts.
c. Reassembly and Installation.
(1) Refer to figure 10, callouts 1 through
7, and reassemble and install the
circular level.
(2) Install the base plate assembly (para
d. Adjustment. If the level bubble is not cen-
tered in the vial, the circular level is out of
adjustment. Tighten or loosen the three adjust-
ing screws (7, fig. 10) to bring the level bubble
to center.
6
4 7 . T ribra c h Ba se
a. Removal and Disassembly.
(1) Remove the base plate (para 43).
(2) Remove the leveling screws (para 44).
(3) Remove the optical plumbing assembly
(para 45).
(4) Remove the circular level (para 46).
MEC 6675-244-15/8
(5) Refer to figure 10, callouts 8 through
17 and remove and disassemble the
1
Setscrew, cover retaining
2
Cover
lock plate (8) from the tribrach base
3
Screw, pointscrew retaining
Screw, adjusting
4
(17).
5
Nut, leveling screw
Knob
6
b. Repair and Replacement. Remove burs
7
Screw, leveling
and straighten minor bends on the base.
8
Setscrew, nut retaining
Replace parts damaged beyond repair with
serviceable parts.
disassembly and reassembly.
AGO 10139A
