l o n g , and thread the free end through the hole in
t h e top of the plumb bob (6) and out 1 of the 2
notches in the side. Pull the cord out of the notch
and tie a knot in it. Pull on the free end of the long
cord (5) until the knot engages the chamber in the
top of the plumb bob (6).
( 2 ) Thread the free end of the long cord (5)
through one of the holes in the slide (4). Install the
ring (3) on the cord. Thread the cord back through
t h e second hole in the slide (4). Tie a knot in the
end of the cord on the underside of the slide.
(3) Thread one end of a short cord (7) through
t h e ring (3). Aline the ends of the cord and wrap
them together with a length of fine wire. Thread the
free end of the wire into the large end of the bayonet
tube (1) and out the hole in the top. Carefully pull
the wired free ends of the short cord (7) through the
hole in the top of the bayonet tube (1). Remove the
wire from the cord ends and tie a knot in the free
ends of the cord. When typing the knot in the short
cord, be sure the looped cord is short enough so the
r i n g hangs inside the barrel of the bayonet tube.
3-30. Tripod Wrench
Remove the tripod wrench (2, fig. 3-8) from the
tripod accessory case (1, fig. 2-5). Clean the wrench
w i t h an approved cleaning solvent. Make a visual
inspection of the wrench for evidence of wear,
b u r r s , cracks, or breaks. Smooth out minor burrs.
Inspect to see if the wrench engages the bolts on the
5.
Long
cord
1.
Bayonet
tube
tripod head in a satisfactory manner. Replace a
2.
Tripod
wrench
6.
Plumb
bob
d e f e c t i v e wrench. Install the wrench in the tripod
3.
Ring
7.
Short
cord
4.
Slide
accessory case (1).
3-8. P l u m b
bob
and
tripod
wrench,
exploded
view.
c.
Reassembly.
( 1 ) Take a piece of cord (5, fig. 3-8), 5 feet
Section
XII.
COMPASS
ASSEMBLY
General
compass needle screw (2, fig. 3-9) and is secured in
The compass assembly is mounted on the top of the
a locked position with the compass caging knob as
alidade and is held in place by the compass holder
e x p l a i n e d in paragraph 2-8. The compass housing
and leg, which rests on the alidade, adjacent to the
may be locked in any position with the compass
collimation level mirror assembly (1, fig. 1-2)
clamp screw (para 2-9).
mounting point. The compass rotates on the
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