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MPPalmer(at)aol.com
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 Posted: Fri Sep 08, 2006 11:08 pm Post subject: Alternator longevity? |
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We have the Motorola 60A alternator S/H offered as an option 20 years ago. Comes with larger pulley to reduce rotational speed. Still, I have to overhaul it every 400 to 500 hours.
Have had to replace one case half (fretting), always bearings (upgraded to HD bearings, but not much improvement), sometimes diodes, and this last time, the stator failed from vibration. Just about every part has failed at 2600 hrs except the rotor. Have a blast tube blowing on the alternator for some cooling.
Am wondering what kind of time between overhaul you all are seeing on alternators? What lasts the longest? I'd switch to the Nippon everyone seems to use, but we have an old narrow deck engine, and I have a funky, custom bracket that I'd rather not re-engineer.
Thanks,
Mike Palmer <><
www.members.cox.net/mppalmer/
FT gear bracket crack [quote][b]
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jdhcv(at)yahoo.com
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| Posted: Sat Sep 09, 2006 7:13 am Post subject: Alternator longevity? |
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Hi Mike, you probably aren't going to have much luck
with your question. Very few people on this list have
enough hours on their aircrft to wear one out. ;<)
--- MPPalmer(at)aol.com wrote:
| Quote: | We have the Motorola 60A alternator S/H offered as
an option 20 years ago.
Comes with larger pulley to reduce rotational speed.
Still, I have to overhaul
it every 400 to 500 hours.
Have had to replace one case half (fretting), always
bearings (upgraded to HD
bearings, but not much improvement), sometimes
diodes, and this last time,
the stator failed from vibration. Just about every
part has failed at 2600 hrs
except the rotor. Have a blast tube blowing on the
alternator for some cooling.
Am wondering what kind of time between overhaul you
all are seeing on
alternators? What lasts the longest? I'd switch to
the Nippon everyone seems to use,
but we have an old narrow deck engine, and I have a
funky, custom bracket that
I'd rather not re-engineer.
Thanks,
Mike Palmer <><
www.members.cox.net/mppalmer/
FT gear bracket crack
|
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Craymondw(at)aol.com
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| Posted: Mon Sep 11, 2006 7:01 pm Post subject: Alternator longevity? |
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I bought a used low time alternator from Wentworth that came off a Bonanza and have 1,000 hours on it. Glasair2S FT 200 HP Lycoming [quote][b]
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