Overhaul Antenna; To Replace Support Tube; If Replacement Of Drive Or Mast Is Indicated - Pontiac Grand Prix Service Manual

15-36 1969
PONTIAC SERVICE MANUAL
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 j-om lead-in plug pin and insulator
assembly to prevent this wire )om 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. 1f replacement
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 assembly,
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 cordj-om disabled drive, place assembly in
vise so normal plane of nylon cord is parallel with floor.
Then, using both hand, pull on .3OO-diameter mast tube
until nylon cord is removed completely j-om drive.
CA UTZON: DO NOT attempt service on components of
drive assembly. This must be serviced
as
a complete unit.
10. Remove bottom insulator and water seal washer
from tubular fitting, using wire hook or long nose
pliers.
1 1. Thread nylon cord through bottom insulator with
small diameter end down. Then thread nylon cord
through water seal washer.
I
12. ~~~l~ 12 volts D.C. (down direction of mast) to
power leads and feed nylon cord into drive assembly.
Do not allow bend or kink to occur in nylon cord.
NOTE: Push water seal washer and bottom insulator all
the way down into tubular jtting before nylon cord
completely disappears into drive assembly. Remove
power, i f necessary, to seat these parts.
13. Push .400 tube section down into tubular fitting on
drive. Make sure that upper edge of flange on insulator
bushing is below center of 3 holes in tubular fitting.
14.
Install support tube (minus lead-in flange, pin and
insulator assembly) in proper position, making sure hook
up wire is extended through proper hole in support tube.
IS. Install three screws to hold support tube to drive
assembly.
16. Solder hook-up wire to pin and insulator assembly.
CA UTZON: Do not overheat by slow soldering.
17. Assemble flange over pin and insulator assembly
and install two screws.