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Posted by PrecisionMachinisT on September 2, 2006, 9:57 pm
>
> >
> >>
> >>
> >> > Take the oil port caps out and try and put oil in it. Betcha cant
> >> > put more than one or two drops in it.
> >> > Bubba
> >>
> >>
> >>
> >> That's all you're supposed to put in.
> >> Any more than a few drops and you're putting in too much.
> >> The main problem with oiling DD motors is that you only have access
> >> to the one oil port when it's in the blower housing.
> >> I've seen a few older motors that have a tube connected to both oil
> >> ports so both bearings can be lubed at the one port, but I tried to
> >> buy them at my local motor supply house and they can't find them
> >> anywhere.
> >>
> >
> > Estimate had forced in perhaps 2 cc of oil...and beings as the
> > bearings were completely dry...
> >
> > --
> >
> > SVL
>
>
> Ya...it's hard to tell just how much is enough and how much is too
> much...general rule of thumb is 5 or 6 drops per bearing, any more and
> the oil can end up in undesirable places inside the motor.
> Also, the fact that they were dry and making a noise suggests to me that
> they are damaged and may not last very long.
Well, I was at the shop when the wife called telling me it had suddenly
started making one hell of a racket, so I told her to shut it
off....guessing it was probably without an oil film for only a few minutes
time.
So far, so good..it's been running constantly for about 48 hours now...
> Be prepared to change that motor.
Yup...
Already even have another heat pump attached to the same ducting run so
won't be left in the cold should one system fail
> Older Lennox furnaces use a small diameter motor, 5 inch I think, as
> opposed to a 5.5 inch.
Sounds about right, it's 1/2 hp 3 speed with 1/2in shaft....
> If you have a problem finding a replacement, let me know and I'll look
> up the after market one.
Appreciated--pretty sure it wasn't the oem motor in there so already wrote
the data off the motor plate in felt pen onto the blower housing.
There are other issues with that Lennox though...and so if any serious $$$
needs spent then probly I'll just end up replacing it with factory matchup
for the much newer Trane condensor outside.
--
SVL
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