Section II. OPERATION UNDER USUAL CONDITIONS
3-3 PRELIMINARY STARTING PROCEDURES. Refer
to figure 3-2. Take the following steps before operating
Before the AN/GSA-131(V) 1 antenna
the equipment of Antenna Tower TS-9A:
is raised, align the 7/16-inch-diameter
holes of horizontal brace No. 1 with
a. Connect junction box to 120-Vac, 60-Hz, single-
those of the carriage and secure with
phase power source.
b. On junction box, set the following circuit
equipment may occur if the carriage
breakers to the ON position:
is improperly positioned too far away
(1) 15-ampere convenience outlet number 1.
(2) 15-ampere convenience outlet number 2.
(3) 15-ampere aviation lights.
(4) 20ampere elevator hoist.
Before the AS-2304/G antenna is
raised, position the carriage so the
3-4 OPERATING PROCEDURES.
horizontal brace No. 2 are aligned
a. Aviation Lights.
The aviation lights are
manually operated by use of the ON/OFF switch in the
lighting control unit. The lights should be turned on at
antenna elements and tower if
least 30 minutes prior to sunset and kept on until 30
minutes after sunrise, or at any time light emanation
from the northern sky is less than 35 foot-candles.
(2) When carriage is properly positioned on
b. Antenna Elevator. The antenna elevator is used
elevator secure with hardware provided.
to elevate and position the AN/GSA-131(V)1 or the AS-
(3) If the AN/GSA-131(V)1 antenna is being
Once the elevator is properly
removed, remove horizontal elements before the
installed, operation is quite simple. However, the
elevator is lowered.
following precautions must be strictly observed to
prevent an overload which could damage the equipment
(4) Once the antenna is properly secured to
or create possible hazards to personnel.
the elevator, lowering may begin. Operate UP/DOWN
switch and watch for any possible misalignment that
(1) Do not use the elevator for transporting
could impede travel of the elevator on its tracks.
(5) When the elevator reaches its lowermost
(2) Proper alignment of vertical tracks is
limit of travel, release the DOWN button.
essential. Any misalignment will dangerously overload
hoist and related equipment.
(6) Remove antenna from carriage.
(3) Never stand directly below any load being
(7) Remove carriage from elevator.
d. Cable Hoist.
(4) Always bolt carriage in position on
(1) Lifting or Pulling. To lift or pull, place
elevator when antenna is raised or lowered.
upper control lever in position shown in figure 34.
(5) Do not disable limit switch. Hoist cable
Holding pawl is now engaged against ratchet teeth.
may become overloaded.
Work handle up and down at speed required to get
desired operation. Handle may be inserted into either
(6) Prior to actually moving either antenna,
end of the U-frame socket to enable personnel to work
raise the elevator and the roll carriage onto tower top.
in restricted areas.
Check for proper operation of the hoist and the limit
switch alignment of tracks. Check alignment of carriage
(2) Lowering. To lower, place upper control
bolt holes with those of top tower horizontal braces.
lever in position shown in figure 34. Operate handle to
its extreme down position until load is removed from
(7) Do not allow vent plug on elevator hoist to
holding pawl. As handle is slowly released, the load will
be lowered one notch. To continue lowering, repeat this
Damage to oil seals may result.
operation. Lowering of heavy loads is easier if a quick
(8) Always cover the hoist UP/DOWN control
(sharp) downward handle motion is used.
switch with a weather proof material when the hoist is
(3) Free Wheeling. To release cable for free
not in operation.
wheeling, place upper control lever as shown in figure 3-
c. Antenna Elevation.
4. Hold spring-loaded holding pawl in position shown.
(1) Assemble carriage assembly to antenna
The cable may now be pulled from the drum to permit
rapid and accurate positioning while attaching to the
object to be pulled or lifted. Similarly, with upper control
lever as shown, excess slack may be quickly and easily
rewound on to the drum using winding wheel.