开云体育

Greetings,

There may yet be a solution. There is a product called “Energy Release”
Anti-friction Metal Conditioner. It is available at many different places
including Amazon.

More than twenty years ago I was introduced to this product by a friend who
became an “Energy Release" independent dealer. I think back then the company
was perhaps just starting and they were making their name through independent
dealers who would go around and demo the product.

I have used it as necessary on a wide variety of situations since my friend
showed the stuff to me. It doesn’t take very much to make a significant
difference. The 8 fl. oz. Bottle listed on Amazon should last a lifetime,
probably more. I’m still using from the bottle I bought more than twenty years
ago and it still works just fine.

My friend had a demo machine where he would install a steel space on a 1/4 HP
motor arbor. He had a long handle that had a fixed pivot point and he would
bring it in contact with that space and easily bring the motor to a dead stop.
Then he would apply just a little of the Energy Release to that steel spacer
and try as hard as he might he could not generate enough friction force to stop
the motor.

I was impressed and I have never been disappointed using it.

This might be worth a shot. If it doesn’t resolve this situation I am certain
you will find many uses for it over the coming years.

Best wishers!

Ken

On Apr 6, 2024, at 10:43 PM, n4buq <n4buq@...> wrote:

I finally got around to removing the fan motor. I was able to get it apart and,
unfortunately(?) it uses a bronze (oilite?) bushing. There appeared to be
sufficient oil on the shaft but I went ahead and cleaned everything and applied
some synthetic oil to be shaft, bushing, and soaked the oil sponges with it.
With the condition it was in, I didn't expect much, if any improvement, and I
wasn't disappointed. I guess I'll just put up with the noise.

Thanks,
Barry - N4BUQ

Thanks, Chuck. The manual gives a procedure for lubricating the motor but, so
far, I cannot find the places where it states to apply the oil. Apparently
there should be holes to do that but I don't see them. I think I will go ahead
and remove the fan (it needs a bit of cleaning anyway) and see if I can
disassemble, clean, lube, and reassemble it. Hopefully that will help/cure
most of the whine.

Thanks again,
Barry - N4BUQ

The whine is the ball bearings rolling on a not so smooth
race. The problem could be the metal of the race has been
brinelled by the balls smacking on it... kind of like little
ball peen hammers. Or it could be chunks of dried grease
making noise as they get into stuff.

Most people that try to lubricate these fans don't realize
that there are two ball bearings in the motor, one you can
easily see if you remove the label, and the other spring
loaded to the other side of the fan. You have to lube them
both.

The motors come apart pretty easy. Usually, there is a "C"
ring, or a plastic washer like piece that is clipped over
a groove in the bearing shaft. Remove it, and the fan, and
both bearings will pop right out.

Then remove one seal from each bearing, and wash them out with
naptha, or varsol, or gasoline... It only takes a little, and
blow them try. Don't let them spin very fast, as it will
Brinel the bearing races.

Put a little dab of lubriplate in the bearing, and you are good
to go. Don't pack them full, that only turns the bearing into
a grease pump, and makes everything turn slow, and get hot.

Assembly is the reverse of disassembly.

-Chuck Harris


On Tue, 2 Apr 2024 15:42:51 -0400 (EDT) "n4buq" <n4buq@...>
wrote:

Do all the 140-series scopes have extremely noisy fans? My 140B is
excessively noisy and I'm wondering if a different fan could be
substituted. I don't mind the wind noise all that much, the whine
that's associated with it is pretty obnoxious. I haven't lubricated
it yet but I suspect that won't really knock down that whine very
much (if at all). Looking for suggestions.

Thanks,
Barry - N4BUQ