The rotator was received, used, as a gift from a friend and has been working
flawlessly for about 10 years until this winter. I'm not sure about the
specific model number suffix (after OR-2800), but this has an AC motor with
the motor capacitor installed inside the rotator housing.
When the weather gets very cold - below freezing - it won't rotate. After
the temperature warms up to within a few degrees of freezing, it begins
working again. I believe that the problem is due to one or more of the
following:
. water ingress
. old grease that needs to be changed
. defective motor capacitor
When the weather warms up, I will remove the rotator from the tower and
proceed to examine and overhaul it. My questions are:
1. Does anybody know of a water ingress problem and if so, what was
the cause and how was it fixed?
2. I will degrease and re-grease the rotator with a high quality low
temperature grease. Molykote 33 Extreme Low Temperature Bearing Grease
(Medium) looks good, but it only has a 5 year shelf life. I'm not convinced
that it will be good for many years. Any recommendations for a time-proven
grease that has not been a problem with temperatures as low as -30 F would
be appreciated.
3. I would like to install a highly reliable motor capacitor.
Suggested manufacturers (and those to avoid) would be appreciated.
4. Is there anything else that should be cared for while the rotator
is in the shop?
Thanks for any help.
73, Riki Kline, K7NJ
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