Table 3-2. Linkage orientation Device Controls and Indicators

TM 9-4931-363-14&P

Table 3-2. Linkage orientation Device Controls and Indicators

Nomenclature

Function

Provides level indication of LOD.

Bubble level indicator

Used to align linkage rails in roll

Provides off-angle view of bubble level

Bubble level reflector

Secures T-bar over linkage rails where they are resting

T-lock screw

in grooves of rail clamp base

Secures swivel frame in position when adjusting rail clamp

Elevation locking knob

base to desired elevation angle

Secures rail clamp base in desired azimuth position

Azimuth locking knob

Adjust bubble level assembly

Thumb screws

Adjusts plane of magnet to be perpendicular to the

Magnetic adjusting device

longitudinal line through the center of the borescope bracket

Secures rail clamp base in the 0-degree or 5.5-degree position

Alignment pin

3-7