36. Plate Level Bubble Does Not Stay in Center
Illumination lamp defec-
Plate level out of adjust-
Batteries defective ..............Replace the batteries (par.
42. Tripod Legs Will Not Lock in Position
Collimation level out of Adjust the level (par. 16).
Leg clamping screws
Tighten or replace screws
38. Telescope Crosslines Will Not Focus
loose or defective.
Telescope eyepiece defec- Replace the eyepiece (par.
Circle drive setting pinion Adjust circle drive (par.
out of adjustment.
44. Leveling Screws Too Tight or Too Loose
Microscope eyepiece de- Replace the eyepiece (par.
or too loose.
Unequal or Absent
45. Telescope Turns Too Hard or Too Easily
Horizontal circle or
the mirror (par.
Vertical clamp screw
Loosen clamp screw.
vertical circle illuminat-
ing mirror defective.
Section VI. CARRYING CASE AND PACK RACK
(3) Cleaning, inspection, and repair.
The carrying case for the theodolite is composed of
(a) Clean all metal parts with an approved
the metal hood and base. The carrying case provides a
cleaning solvent and dry thoroughly.
convenient means of carrying the theodolite in the field
(b) Clean the strap with saddle soap.
and serves as a dustproof and moistureproof container
(c) Inspect the straps for cracks, breaks, and
for the instrument when it is in storage. The base has a
cuts. Inspect for worn mounting holes and
recess in the bottom which houses the desiccant
container and provides storage for the screwdriver,
(d) Inspect the lever pins for burs and wear.
24and 40-power telescope eyepiece assemblies, and
Inspect the locking levers and lever
springs for burs, bends, and cracks.
carry the theodolite, in its carrying case, when use of the
Inspect for enlarged mounting holes.
carrying case alone is impractical.
(e) Inspect the hood for dents, cracks, and
47. Carrying Case
holes. Inspect the bottom rim for out-of-
(f) Remove all burs from the lever pins,
locking levers, and lever springs.
disassemble the hood.
Straighten minor dents. Remove all
AGO 5078A 39