[xj] SIII electric aerial overhaul

Just for the archives, this one, in the hope that it may be of some
help to someone.

I posted a query about our recalcitrant aerial the other day, it
would only work with manual assistance. Here’s an update:

Finding that replacements are quite expensive and in any case
apparently not as original, I took ours to pieces.

Could see nothing obviously wrong, so just cleaned it all up and
lubricated inside. Upon reassembling and after a couple of failed
attempts, I tightened the centre spigot as far as it would go
(using pin-nosed pliers), put back the circlip, nuts & housing and
amazingly found that it not only worked perfectly, but actually
worked better than it has ever done !

The clicking sound you get is the metal saucer in the circular
housing brushing over the raised sections of the plastic disc,
previously ours was passing over these sections too easily so the
thing was just clicking instead of moving the aerial. The disc
stops rotating when it meets resistance, i.e. when the aerial
reaches the end of its travel.

I therefore surmised that with more pressure on the metal saucer,
it would not slide over the raised sections as easily, and this
seems to have been borne out in practice.

When the aerial reaches the end of travel, a cog moves a changeover
relay and switches it off. Next time it’s activated by the radio,
therefore, the travel is in the opposite direction.–
Anthony Richards
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
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Good info, Anthony!–
Alex
79xj6L SII (BRG + wires)
86xj6 SIII (Black)
61 Sprite MkII (Red)
Menlo Park, Calif.

Anthony Richards wrote:

Just for the archives, this one, in the hope that it may be of some
help to someone.

I posted a query about our recalcitrant aerial the other day, it
would only work with manual assistance. Here’s an update:

Finding that replacements are quite expensive and in any case
apparently not as original, I took ours to pieces.

Could see nothing obviously wrong, so just cleaned it all up and
lubricated inside. Upon reassembling and after a couple of failed
attempts, I tightened the centre spigot as far as it would go
(using pin-nosed pliers), put back the circlip, nuts & housing and
amazingly found that it not only worked perfectly, but actually
worked better than it has ever done !

The clicking sound you get is the metal saucer in the circular
housing brushing over the raised sections of the plastic disc,
previously ours was passing over these sections too easily so the
thing was just clicking instead of moving the aerial. The disc
stops rotating when it meets resistance, i.e. when the aerial
reaches the end of its travel.

I therefore surmised that with more pressure on the metal saucer,
it would not slide over the raised sections as easily, and this
seems to have been borne out in practice.

When the aerial reaches the end of travel, a cog moves a changeover
relay and switches it off. Next time it’s activated by the radio,
therefore, the travel is in the opposite direction.

===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
Archives: http://www.jag-lovers.org/lists/search.html

To remove yourself from this list, go to http://www.jag-lovers.org/cgi-bin/majordomo.

// please trim quoted text to context only