Furnace Blower Motor Rebuild - HVAC - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Like Tree7Likes
  • 2 Post By zootjeff
  • 1 Post By de-nagorg
  • 1 Post By user_12345a
  • 3 Post By zootjeff
Reply
 
Thread Tools Search this Thread
Display Modes
Old 11-21-2016, 07:44 AM   #1
Member
 
Join Date: Jul 2007
Location: Seattle WA
Posts: 582
Rewards Points: 444
Default

Furnace blower motor rebuild


I have a 92% Trane furnace with a noisy blower on the variable speed fan. I pulled the blower and took out the permimant magnet rotor. You can tell the bearings are shot on the shaft end.. Does anyone have experience pulling bearings that could give me advice? Is there a jig I can buy for this or do I need to take it to a machine shop?
Attached Thumbnails
Furnace blower motor rebuild-img_4501_1479735803649.jpg  
zootjeff is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-21-2016, 08:52 AM   #2
JUSTA MEMBER
 
Join Date: Feb 2014
Location: Central Wyoming
Posts: 14,678
Rewards Points: 4,320
Default

Re: Furnace blower motor rebuild


There are bearing pulling tools.

Sold for automotive , and other bearings.

Have you looked for them?


ED
de-nagorg is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-21-2016, 09:12 AM   #3
Member
 
Join Date: Feb 2016
Posts: 2,490
Rewards Points: 568
Default

Re: Furnace blower motor rebuild


Just replace the motor
BayouRunner is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-24-2016, 04:55 PM   #4
Member
 
Join Date: Jul 2007
Location: Seattle WA
Posts: 582
Rewards Points: 444
Default


I wasn't able to find this motor for less than $500... I've ordered the new bearings and successfully pulled the old ones from the rotor. Looks like it is going to cost me about $60 for new bearings and tools..
SeniorSitizen and de-nagorg like this.
zootjeff is offline   Reply With Quote
Old 11-24-2016, 07:37 PM   #5
Member
 
user_12345a's Avatar
 
Join Date: Nov 2014
Location: Canada
Posts: 12,159
Rewards Points: 3,068
Default

Re: Furnace blower motor rebuild


you may be able to buy the motor part without the controller.
__________________
I am not in the business of any trade I give advice on. I have non-professional hvac experience + good knowledge of theory. Attempt repairs at your own risk. Never jump out safeties - especially pressure switches - on a furnace for testing with fuel supply on; use a meter. Do not troubleshoot with live line voltage present unless there's no alternative.
user_12345a is online now   Reply With Quote
Old 11-24-2016, 07:40 PM   #6
Member
 
Join Date: Jul 2007
Location: Seattle WA
Posts: 582
Rewards Points: 444
Default


Is there a reason I should toss a perfectly good motor that just needs new bearings?
zootjeff is offline   Reply With Quote
Old 11-24-2016, 07:42 PM   #7
Member
 
Join Date: Jul 2007
Location: Seattle WA
Posts: 582
Rewards Points: 444
Default


Here is the motor..
Attached Thumbnails
Furnace blower motor rebuild-img_4498_1480038158305.jpg  
zootjeff is offline   Reply With Quote
Old 11-24-2016, 09:27 PM   #8
JUSTA MEMBER
 
Join Date: Feb 2014
Location: Central Wyoming
Posts: 14,678
Rewards Points: 4,320
Default

Re: Furnace blower motor rebuild


Quote:
Originally Posted by zootjeff View Post
Is there a reason I should toss a perfectly good motor that just needs new bearings?
NOT in my world.

ED
ChuckF. likes this.
de-nagorg is online now   Reply With Quote
Old 11-24-2016, 09:33 PM   #9
Member
 
user_12345a's Avatar
 
Join Date: Nov 2014
Location: Canada
Posts: 12,159
Rewards Points: 3,068
Default

Re: Furnace blower motor rebuild


Quote:
Originally Posted by zootjeff View Post
Is there a reason I should toss a perfectly good motor that just needs new bearings?
if you can fix the motor, you should.
de-nagorg likes this.
__________________
I am not in the business of any trade I give advice on. I have non-professional hvac experience + good knowledge of theory. Attempt repairs at your own risk. Never jump out safeties - especially pressure switches - on a furnace for testing with fuel supply on; use a meter. Do not troubleshoot with live line voltage present unless there's no alternative.
user_12345a is online now   Reply With Quote
Old 11-25-2016, 05:04 AM   #10
An old Tradesmen
 
Join Date: Oct 2008
Location: Somewhere
Posts: 39,052
Rewards Points: 9,824
Default

Re: Furnace blower motor rebuild


Quote:
Originally Posted by zootjeff View Post
Is there a reason I should toss a perfectly good motor that just needs new bearings?
You'll know after you replace the bearings.
__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is offline   Reply With Quote
Old 12-07-2016, 11:00 PM   #11
Member
 
Join Date: Jul 2007
Location: Seattle WA
Posts: 582
Rewards Points: 444
Default


Well crap. The bearings on the motor are 40mm OD and 12.7mm ID. The bearing had a fafnir 203 kd on it.. I ordered that bearing and got a 17mm ID.. Bummer. Any ideas where to go to get a 203kdd (double shield) that has a 1/2" shaft?

Jeff
zootjeff is offline   Reply With Quote
Old 12-08-2016, 04:33 AM   #12
JUSTA MEMBER
 
Join Date: Feb 2014
Location: Central Wyoming
Posts: 14,678
Rewards Points: 4,320
Default

Re: Furnace blower motor rebuild


I would think that in Portland, there is a large repair shop for electric motors, that can help you get the correct sizes.

I know that here in the middle of Wyoming that we have 2 electric motor repair shops.

Both are quite busy.

Have you tried to find any help that way?


ED
de-nagorg is online now   Reply With Quote
Old 12-17-2016, 11:00 AM   #13
Member
 
Join Date: Jul 2007
Location: Seattle WA
Posts: 582
Rewards Points: 444
Default

Re: Furnace blower motor rebuild


OK, I solved the bearing problem. I was trying to order based on the markings on the bearings and that is clearly not the way to do it.

I wound up getting:
6203-ZZ-1/2 Special Size Ball Bearing 1/2x40x12mm Shielded KYK from bearingsdirect.com and they were 10 bucks each plus shipping. Got them and they fit perfectly, and they are double metal shielded just like the ones I pulled off. Now to rebuild the motor and put the furnace back together.

-Jeff
zootjeff is offline   Reply With Quote
Old 12-28-2016, 11:20 AM   #14
Member
 
Join Date: Jul 2007
Location: Seattle WA
Posts: 582
Rewards Points: 444
Default


I reassembled the motor last night and put the the system back together and it runs like a charm. It was very helpful to take pictures of the assembly for taking it all apart so that I could have a reference when putting it back together.

When running heat pump mode it has the highest CFM and that's when the noise was the most annoying from the failed bearings. Now it runs smooth again.
Attached Thumbnails
Furnace blower motor rebuild-img_4497_1482945600216.jpg  
zootjeff is offline   Reply With Quote
The Following 2 Users Say Thank You to zootjeff For This Useful Post:
de-nagorg (12-28-2016), SeniorSitizen (12-28-2016)
Sponsored Links
Advertisement
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Furnace flame and blower alternate 1harleynut HVAC 7 10-29-2013 08:53 PM
furnace blower won't come on gulleyj HVAC 15 11-11-2012 03:16 PM
Replace furnace or blower agibby5 HVAC 6 07-17-2012 06:17 PM
How much power does a small furnace blower use? Red Squirrel HVAC 10 07-31-2009 09:03 PM
Problems with new furnace..Overheating, having to reset. Furnace too big? Tommy2 HVAC 41 12-01-2008 01:55 PM




Top of Page | View New Posts