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Topic: Lubricating Precision Bearings (13 msgs / 362 lines)
1) From: Rick Farris
Ok, I've got my Hearthware/Home-Innovations Precision apart, and I'd like to
lubricate the motor bearings.  I think I see where to do it, but I'd rather
look at a picture.
Do you know the URL where someone posted complete instructions (with
pictures) for doing the job?
-- Rick
P.S. If you *do* know, please tell me.
[RF]
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2) From: floyd burton
Sorry I am digitially challenged till after first of year-next tax write off
year-would suggest using a high performance oil like synthetic based for jet
engines-in case you don't happen to have jet engine oil-Mobil One is a good
alternative.  Don't use spray on stuff like WD-40 has very poor lube
properties.  I apply my Mobil One with a syringe purchased at a vet supply
place-people also use inkjet refill injectors also.  In a pinch used a broom
straw to dab oil on to the "bearings".  These are the thingies just above
and below the motor.  What I did was to apply some to both surfaces in a
applied surface up position and then waited a bit and then briefly turned
the unit on and then off to get oil into bearings/bushings.  Worked for me.
enjoy

3) From: Rick Farris
Floyd wrote:
<Snip>
So then did you remove the motor from the black plastic top piece to get to
the upper bearing?
-- Rick
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4) From: floyd burton
Yes if I understand your question-not the questioner-but my noggin is a bit
under pressure today-the thing just swings out.  Would take mine apart but
in a hurry to get a job out.  IMHO another factor that limits the life of a
lot of electrical devices that are "loaded" by their task is poor or
inadequate circuits.  Try not to have anything else on the same circuit
running at the same time-once turned on microwave on same circuit-eeech did
the HWP slow down.  Also some dimmers on the same circuit wreak havoc with
the electronics in the HWP.  Oh and someone mentioned using some rather
severe caustic like over cleaner to clean the top and someone else asked if
the top can be put in a dishwasher-I would say no to both-I clean the screen
with a dishtowel-lots easier than the supplied brush.  Let us know how it
went.

5) From: EuropaChris
IMHO, the lower bearing is the one with the toughest job.  It gets the heat from the commutator/brush area which tends to gum up the oil much faster.  However, oiling both is best.
I always oil both bearings on my old poppers (Poppery Mk.I or 'original' Popcorn Pumper) before putting them into use.  After 25 years, the oil tends to evaporate or dry out, leaving a dry bearing.  In fact, I just 'rescued' my 1977 vintage ShopVac.  The other weekend it started an awful squealing.  I took the motor completely apart, figuring I had nothing to loose.  The brushes were like new.  The upper bearing was a bronze bushing (by the commutator) and in good shape (if a bit dry).  The lower bearing (by the fan) was a ball unit, but totally shot.  The vac had seen little use, but the grease dried out over time and the bearing finally crapped out.  $1.81 later I had a new bearing in there and the vac works better than ever.  I also lubed the top bushing and cleaned it out.
I also rescued my father-in-laws ancient Stanley router, circa 1962.  Again, it had seen light use, but age had dried out the grease in the ball bearings.  One of them was an odd size and a bit costly, but $15 later it was running like new again.  I use it regularly, and it's one smooth running router, much unlike the nasty cheap Craftsman routers that sound like a jet engine inhaling a dumptruck load of gravel.
Moral of the story...don't give up on quality tools without a fight.  In many cases a simple part and a little TLC will get them running again like new.
Chris
"Rick Farris"  wrote:
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6) From: Rick Farris
SOMEONE HAS BEEN LYING TO ME!  I took my Precision apart, and easily found
and lubricated the bottom bearing.  But to get to the top bearing required
removing the heater shroud.  When I got the shroud apart, I found that the
bottom half of the shroud was held on by an impeller that was pressed onto
the motor shaft.  In other words, there was no way to get to the upper
bearing.
I put the shroud back together and re-examined the upper motor area and
found that with a flashlight I could see a small section of motor shaft,
just below the upper bearing.  But after looking at both bearings, I
realized that the part of the bearing that could possibly be reached by
running some oil down (up) the shaft, was the part that wouldn't take the
oil!
I'm pretty sure that anybody that says they lubricated the upper bearing is
fooling themselves.  :-)
-- Rick
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7) From: floyd burton
Hey Rick-I was able to lube both of mine-I have a very old black HWP-maybe
they changed the design.  Chris sez-and he is an engineer-the bottom one is
the important one to lube.  Keep in mind I got access by using a long hypo
syringe.  I put the oil on the shaft and let it run to the bushing spun it
around by hand a few times and then plugged in and ran it briefly.  Yeo
maybe I foolded myself but I lubed something.

8) From: EuropaChris
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9) From: sho2go
Not sure if the new ones are different, but the old ones have the impeller
screwed onto the motor shaft.  Normal thread direction, hold the shaft on
the bottom w/pliers wrapped in a rag, and turn by hand.  Comes off easily.
Mike

10) From: Gary White
Rick,
That impeller unscrews to allow access to the top bearing.  It's been a
while since I've taken mine apart but I believe that you have to grasp the
bottom of the shaft to prevent it from turning while unscrewing the
impeller.  It should unscrew fairly easily by hand.
HTH - Gary

11) From: Gary White
Just to clarify, you will need to use pliers or vise grips to grasp the
shaft while turning the impeller by hand.

12) From: David Westebbe
<Snip>
Where do you buy parts like bearings?
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13) From: EuropaChris
Most cities have a bearing house that supplies the industrial/maintenance sector.  Or, McMaster-Carr and likely several other on-line companies will sell you bearings.  Search around and you'll find plenty...
Chris
"David Westebbe"  wrote:
<Snip>
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