Pontiac tempest 1968 Service Manual page 716

ACCESSORIES 15-31
R.H. REAR
Fig. 15-43 Electric Antenna—Pontiac Sedan
OVERHAUL ANTENNA
Replace drive, mast or support tube as follows:
CAUTION: Before attempting replacement of any
of three major sub-assemblies listed below, the
hook-up wire should be removed from lead-in plug
pin and insulator assembly to prevent this wire
from being broken where it is soldered to .400
tube section of mast.
1. Remove two screws holding lead-in flange to
support tube.
2. Remove flange from pin and insulator assembly.
3. Unsolder hook-up pin from wire.
NOTE: Do not overheat pin by slow soldering as
this will destroy pin insulator. Use needle-nose
pliers to hold pin while soldering.
4. Remove pin and insulator assembly. If replace­
ment of drive, support tube or mast is indicated,
continue following steps as required.
5. Remove three screws which hold support tube
to drive assembly.
6. Holding drive in one hand and supporting tube
in other hand, pull (applying back-and-forth rotary
motion at same time) until support tube is removed
from antenna.
To replace support tube:
7. If only replacing a damaged support tube as­
sembly, apply the reverse of steps 1 through 6,
making sure that hook-up wire is extended through
proper hole in support tube.
If replacement of drive or mast is indicated:
8. Holding drive in one hand and mast in other
hand (grasp near bottom of mast), rock mast back
and forth and pull at same time. This will remove
insulator bushing and .400 tube section from tubular
fitting on drive.
9. Apply 12 volts D . C . (up direction of mast) to
power leads until entire length of nylon cord has
been expelled from drive. To prevent kink or bend
in nylon cord, keep it taut by pulling on mast.
NOTE: If drive assembly is inoperative, it will
be necessary to manually remove nylon cord from
drive. To remove nylon cord from disabled drive,
place assembly in vise so normal plane of nylon
cord is parallel with floor. Then, using both
hands, pull on .300-diameter mast tube until nylon
cord is removed completely from drive.
CAUTION: DO NOT attempt service on compo­
nents of drive assembly. This must be serviced as
a complete unit.