Cadillac 54-6219 1954 Shop Manual page 396

16-0-41
Note Page
Note Name No. No.
Removal and Installation of
Vacuum
Antenna
Disassembly of Vacuum Antenna
Assembly of Vacuum Antenna.
1
16-0-41
2 16-D-41
3 16-D-42
Maintenance and Repair Procedures
Moisture in Cylinder
Antenna Will Not Raise or Lower.
Antenna Will Raise But Not Lower
4 16-0-42
4a 16-0-42
4b 16-0-43
4c 16-0-43
GENERAL DESCRIPTION
The radio antenna on 1954 series Cadillac cars
is the piston and rod type, vacuum operated from
the interior of the car through the tone and
speaker control knob on the face of the radio.
Pushing the speaker control knob in will raise
the antenna, pulling it out will lower the antenna.
Vacuum is supplied to the antenna by a hose
running from the vacuum check valve, mounted
below the windshield wiper motor on the engine
side of the cowl, to the control valve in the
radio. Prom there, vacuum lines run to the base
and the top of the antenna cylinder to raise or
lower the antenna.
The antenna lead-in to the radio is in two
sections to facilitate removal of the antenna as
sembly. The lead-in is separated by a plug-in
connector at the rear of the left front fender dust
shield. The short lead-in to the antenna is removed
with the antenna assembly. Care should be taken to
see that this connection is tight. Heavy ignition
noise and a weak signal will be noticed if the con
nection is loose.
The antenna rod is removed without the necessity
of disassembling the antenna assembly. The rod is
screwed into the piston assembly which has four
"dogs on its bottom that slide into four recesses
in the lower plug. This prevents the piston from
revolving while the rod is being unscrewed.
SERVICE INFORMATION
1 Removal and Installation of
Vacuum Antenna
1. Separate lead-in cable at plug-in connector
at rear of left front fender dust shield.
2. Raise antenna rod slightly by hand and lower
it back into position slowly while rotating it until
the "dogs" in the bottom of the piston can be felt
to lock into position
in the
recessed grooves pro
vided in the bottom plug, Fig. 160-1.
The antenna rod may then be unscrewed from
the piston and removed from the assembly.
NOTE:
When using pliers to loosenor tighten
the antenna rod, be sure to protect the chrome
surface of the rodwithapieceof leather or cloth.
3.. Remove dome nit, Insulator, and pad fromtop
of antenna.
4. Disconnect both upper and lower vacuum hoses
from vacuum cylincWr;
5. Remove screw, lock washer, and flat washer
holding lower end of antenna to support on front
fender.
6. Remove antenna assembly.
7. lb install antenna, reverse steps 1 through6.
2 Disassembly of Vacuum Antenna
1. Remove lower vacuum elbow*
2. Remove
two
screws holding shield cup to
bottom of antenna and remove cup and shield cup to
plug washers.
3. Remove drain plug and piston through bottom
of cylinder.
4. Remove two screws holding antenna lead-in
plug retainer to upper part of cylinder and discon
nect. lead-in wire.
5. Remove cylinder to head retaining screw and
remove head assembly from top of cylinder, using
a puller as
shown
in Fig. 160-2. No attempts should
be made to remove the lower seal retainer from the
upper end of the vacuum cylinder; nor should the
capacity coupler be removed from the headassem
bly
ACCESSORIES
VACUUM ANTENNA
TABLE OF CONTENTS
Note Page
Note Name No. No.
NOTE: An antenna head puller, made to the