vibration after motor change
 

We recently had a motor replaced on our Lennox G61MVP series central air
system. My wife called me while they were change the motor as I wasn't able
to be there. They had the wrong puller for the job, so they used a block of
wood to drive the motor off the squirrel cage.She offered to let them use one
of my pullers, ( I have several from my auto repair and welding business ) but
they declined and spent the next 45 minutes beating on it with a hammer. The
first thing I noticed when I got home was the whirring noise and the vibration
when you put your hand on the unit itself. I pulled the front panel and and
checked the new motor for slop in the bearings, they were tight. there is
however about 5 to 10 thousands end play on it and when I spun the squirrel
cage, there is about 1/4 to 3/8 inch run out. Since I don't know and can't
find allowable tolerances anywhere can someone please advise me. Are either of
this tolerances to much ? The squirrel cage isn't dragging, but my experience
with automotive is if you bend or warp the squirrel cage causing it to
unbalance, it will cause premature bearing failure. Is this a concern on this
unit also? Please advise, Thanks

--
for full context, visit https://www.homeownershub.com/mainte...e-1122081-.htm

vibration after motor change
 

On Sun, 22 Jan 2017 16:14:02 GMT, jjordan
m wrote:

We recently had a motor replaced on our Lennox G61MVP series central air
system. My wife called me while they were change the motor as I wasn't able
to be there. They had the wrong puller for the job, so they used a block of
wood to drive the motor off the squirrel cage.She offered to let them use one
of my pullers, ( I have several from my auto repair and welding business ) but
they declined and spent the next 45 minutes beating on it with a hammer. The
first thing I noticed when I got home was the whirring noise and the vibration
when you put your hand on the unit itself. I pulled the front panel and and
checked the new motor for slop in the bearings, they were tight. there is
however about 5 to 10 thousands end play on it and when I spun the squirrel
cage, there is about 1/4 to 3/8 inch run out. Since I don't know and can't
find allowable tolerances anywhere can someone please advise me. Are either of
this tolerances to much ? The squirrel cage isn't dragging, but my experience
with automotive is if you bend or warp the squirrel cage causing it to
unbalance, it will cause premature bearing failure. Is this a concern on this
unit also? Please advise, Thanks

I believe they bent up the squirrel cage but if you complain they are
going to tell you it was already bad and they were just trying to save
you some money. Then they will want to sell you a new one.

vibration after motor change
 

On 1/22/2017 11:14 AM, jjordan wrote:
We recently had a motor replaced on our Lennox G61MVP series central air
system. My wife called me while they were change the motor as I wasn't
able
to be there. They had the wrong puller for the job, so they used a
block of
wood to drive the motor off the squirrel cage.She offered to let them
use one
of my pullers, ( I have several from my auto repair and welding business
) but
they declined and spent the next 45 minutes beating on it with a hammer.
The
first thing I noticed when I got home was the whirring noise and the
vibration
when you put your hand on the unit itself. I pulled the front panel and and
checked the new motor for slop in the bearings, they were tight. there is
however about 5 to 10 thousands end play on it and when I spun the squirrel
cage, there is about 1/4 to 3/8 inch run out. Since I don't know and can't
find allowable tolerances anywhere can someone please advise me. Are
either of
this tolerances to much ? The squirrel cage isn't dragging, but my
experience
with automotive is if you bend or warp the squirrel cage causing it to
unbalance, it will cause premature bearing failure. Is this a concern on
this
unit also? Please advise, Thanks


Sure, they screwed up the fan. Distorted, out of balance. Yes, it can
cause bearing damage. I'd get the owner/manager out there to inspect,
then replace it.

vibration after motor change
 

On Sunday, January 22, 2017 at 12:06:57 PM UTC-5, Ed Pawlowski wrote:
On 1/22/2017 11:14 AM, jjordan wrote:
We recently had a motor replaced on our Lennox G61MVP series central air
system. My wife called me while they were change the motor as I wasn't
able
to be there. They had the wrong puller for the job, so they used a
block of
wood to drive the motor off the squirrel cage.She offered to let them
use one
of my pullers, ( I have several from my auto repair and welding business
) but
they declined and spent the next 45 minutes beating on it with a hammer.
The
first thing I noticed when I got home was the whirring noise and the
vibration
when you put your hand on the unit itself. I pulled the front panel and and
checked the new motor for slop in the bearings, they were tight. there is
however about 5 to 10 thousands end play on it and when I spun the squirrel
cage, there is about 1/4 to 3/8 inch run out. Since I don't know and can't
find allowable tolerances anywhere can someone please advise me. Are
either of
this tolerances to much ? The squirrel cage isn't dragging, but my
experience
with automotive is if you bend or warp the squirrel cage causing it to
unbalance, it will cause premature bearing failure. Is this a concern on
this
unit also? Please advise, Thanks


Sure, they screwed up the fan. Distorted, out of balance. Yes, it can
cause bearing damage. I'd get the owner/manager out there to inspect,
then replace it.

+1

If it wasn't vibrating before and it's vibrating after their half-assed
job, I'd complain. And I'd ask the owner/manager why they don't have
the right tools for the job. Doing this for a business, they should have
the puller. Not only is it the right way, it would actually save them
time and trouble.

vibration after motor change
 

On Sun, 22 Jan 2017 09:18:45 -0800 (PST), trader_4
wrote:

Sure, they screwed up the fan. Distorted, out of balance. Yes, it can
cause bearing damage. I'd get the owner/manager out there to inspect,
then replace it.

+1

If it wasn't vibrating before and it's vibrating after their half-assed
job, I'd complain. And I'd ask the owner/manager why they don't have
the right tools for the job. Doing this for a business, they should have
the puller. Not only is it the right way, it would actually save them
time and trouble.

"You want me to send my wife down there". :-)

vibration after motor change
 

On Sunday, January 22, 2017 at 10:14:06 AM UTC-6, jjordan wrote:
We recently had a motor replaced on our Lennox G61MVP series central air
system. My wife called me while they were change the motor as I wasn't able
to be there. They had the wrong puller for the job, so they used a block of
wood to drive the motor off the squirrel cage.She offered to let them use one
of my pullers, ( I have several from my auto repair and welding business ) but
they declined and spent the next 45 minutes beating on it with a hammer. The
first thing I noticed when I got home was the whirring noise and the vibration
when you put your hand on the unit itself. I pulled the front panel and and
checked the new motor for slop in the bearings, they were tight. there is
however about 5 to 10 thousands end play on it and when I spun the squirrel
cage, there is about 1/4 to 3/8 inch run out. Since I don't know and can't
find allowable tolerances anywhere can someone please advise me. Are either of
this tolerances to much ? The squirrel cage isn't dragging, but my experience
with automotive is if you bend or warp the squirrel cage causing it to
unbalance, it will cause premature bearing failure. Is this a concern on this
unit also? Please advise, Thanks
--


It doesn't take much pounding on a squirrel cage fan to warp it but 1/4 - 3/8" runout on the motor shaft strikes me(no pun) as being excessive. I wonder if the service wreckers hammered the squirrel cage back on to the new motor? I had a special puller that I used when I serviced furnace blowers. It slipped over the blower wheel hub and had set screws to grip the outside of the hub. Then the large center bolt could be tightened to pull the squirrel cage off the motor shaft without damage. ヽ(ヅ)ノ

https://www.amazon.com/Ultimate-Blad.../dp/B001CGFQDW

https://www.youtube.com/watch?v=y9-bbEjPyP0

https://www.youtube.com/watch?v=Kj6mGG5wJu8

[8~{} Uncle Squirrely Monster

vibration after motor change
 

In alt.home.repair, on Sun, 22 Jan 2017 16:14:02 GMT, jjordan
m wrote:

We recently had a motor replaced on our Lennox G61MVP series central air
system. My wife called me while they were change the motor as I wasn't able
to be there. They had the wrong puller for the job, so they used a block of
wood to drive the motor off the squirrel cage.She offered to let them use one
of my pullers, ( I have several from my auto repair and welding business ) but
they declined and spent the next 45 minutes beating on it with a hammer. The
first thing I noticed when I got home was the whirring noise and the vibration
when you put your hand on the unit itself. I pulled the front panel and and
checked the new motor for slop in the bearings, they were tight. there is
however about 5 to 10 thousands end play on it and when I spun the squirrel
cage, there is about 1/4 to 3/8 inch run out. Since I don't know and can't
find allowable tolerances anywhere can someone please advise me. Are either of
this tolerances to much ? The squirrel cage isn't dragging, but my experience
with automotive is if you bend or warp the squirrel cage causing it to
unbalance, it will cause premature bearing failure. Is this a concern on this
unit also? Please advise, Thanks

I had a sort of rattling noise in my air circulating fan in the furnace,
and I woudl have waited until it got worse but I was going away for 2
months, and I didn't really know what the noise was. The oil
company's service department came out, changed the motor, and after they
left, I noticed the same noise. I called and got them to give me back
the motor and send me replacement squirrel cage.

Yes I should have had them put the new one on, and then they could have
gotten their replacment motor back, but I didn't do that. Since I knew
it was just the cage, I didn't bother to replace it before the trip, and
a couple weeks after I got back, it stopped making the noise. That was
years ago and it hasn't started again.

I switched oil companies, and when I was considering switching again, I
did talk to the owner a few years later and he said I should have talked
to him when the problem existed. I believe him. He would have had
them come back and do it right.

You can do what the owner told me to do, call the owner.

Is it vibrating more than it used to?

vibration after motor change
 

In alt.home.repair, on Sun, 22 Jan 2017 16:14:02 GMT, jjordan
m wrote:

We recently had a motor replaced on our Lennox G61MVP series central air
system. My wife called me while they were change the motor as I wasn't able
to be there. They had the wrong puller for the job, so they used a block of
wood to drive the motor off the squirrel cage.She offered to let them use one
of my pullers, ( I have several from my auto repair and welding business ) but
they declined and spent the next 45 minutes beating on it with a hammer.

And btw, you've got a great wife. A lot of them wouldn't know a wheel
puller from a leg puller. And others would pay no attention to what a
repairman was doing, as if there is no reason to pay attention.