Disclaimer: These instructions are
for an early (e.g. '63-'65) antenna. I assume some later years are
the same, but I may be wrong.
If the antenna motor runs and you
have even minimal movement of the antenna, it would seem to indicate
that the antenna drive mechanism is still good. It's likely that the
clutch is slipping. To adjust the clutch:
- Take the antenna out of the car.
- Take off the rounded
(semi-spherical) cover. It will pop off with gentle prying along
a clutch mechanism that consists of a rotating plate and two ball
bearings. The clutch assembly is locked to the drive shaft with a
pin. The clutch pressure is adjusted with a nut on the drive
shaft. Make sure that you clean off all the old lube (that tends
to be everywhere), then loosen the lock nut, and tighten the
adjusting nut just a little (1/4 turn at a time). Don't tighten it
too much, as it needs to slip when the antenna is all the way up
- Repeat as required until the unit
goes up and down.