AFCA Forums Home
Home Search search Menu menu Not logged in - Login | Register
AFCA Forums > Antique Fan Collectors Association > Post-1950 (Vintage) > 1955 Signal Box Fan Making Unusual Noises

 Moderated by: Steve Cunningham, Rod Rogers, Larry Hancock
New Topic Reply Printer Friendly
1955 Signal Box Fan Making Unusual Noises  Rate Topic 
AuthorPost
 Posted: Fri Jan 25th, 2019 05:50 am
  PMQuoteReply
1st Post
Levi Mevis
AFCA Member


Joined: Tue Feb 24th, 2015
Location: Elkhart, Indiana USA
Status: 
Offline
Hello Everyone, I have a 1955 Signal Box Fan Model RW-20 that is electrically Reversable and has a thermostat controller as well. When I first got this fan it was making a very well pronounced Scraping noise that at first I thought might of been bearing related (like the bearings were too dry from not being oiled in years or worn bearings).  
But when I moved the shaft up and down there was absolutely no bearing slop whatsoever but there was excessive back and forth play in the rotor shaft which I figured had to be from there being no fiber spacer washers in the motor anymore due to them degrading and breaking down over the years and when I opened up the motor sure enough I had confirmed my suspicions about there being no spacer washers in there anymore. 

So I bought some fiber washers from the local Ace Hardware store and installed them in the fan which quieted down the scraping noise significantly but it was still there just not as pronounced as it was before.
The Bizarre thing about this scraping noise that this fan is making is that it only happens when the blade assembly is attached to the fan (when the blade assembly is removed the motor is dead silent), it also only happens when the fan is in the upright position, when the fan is tilted slightly either forwards or backwards the noise goes away and the fan runs silently. 

Does anyone here have any ideas as to what the noise my fan is making might be? Like I said I have already ruled out bearing issues because the bearing doesn't have any excessive wear or slop in it, so its something else making the fan make the noise.

I have attached a youtube video I made of the fan making the aforementioned noise that I've been talking about, I demonstrate the fan in both high and low speeds in both forward and reverse directions and you'll notice that the scraping noise is more noticeable in reverse than it is in forward direction and its also more noticeable in High than in low speed, I also demonstrate the disappearance of the noise when the fan is tilted slightly forward or backwards, as you'll see in the video.

Any help in this matter would be greatly appreciated.

Thanks,

Levi


Back To Top PMQuoteReply  

 Posted: Fri Jan 25th, 2019 01:42 pm
  PMQuoteReply
2nd Post
Tom Zapf
AFCA Member
 

Joined: Tue Feb 24th, 2009
Location:  
Status: 
Offline
IS THERE A SPACER BETWEEN THE SETSCREW HUB AND THE MOTOR CAP/BLADE IRONS UNIT? IF THAT IS GOING BAD IT MIGHT MAKE A NOISE. ALSO DUMB QUESTION, BUT THE BLADE ISNT TOUCHING THE VENTIRI ANYWHWERE OR IS THERE A SPOT WHERE THE BLADE HUB/CAP IS TOUCHING A MOTOR BOLT? 

Back To Top PMQuoteReply

 Posted: Fri Jan 25th, 2019 02:12 pm
  PMQuoteReply
3rd Post
Levi Mevis
AFCA Member


Joined: Tue Feb 24th, 2015
Location: Elkhart, Indiana USA
Status: 
Offline
Yes there is a rubber damper washer in between the hub and the blades but it doesn't look like it's in that bad of shape.
The blade isn't touching the venturi or touching a motor bolt.

Back To Top PMQuoteReply  

 Posted: Fri Jan 25th, 2019 02:40 pm
  PMQuoteReply
4th Post
Gunner Lake
AFCA Member


Joined: Sat Feb 28th, 2015
Location: Jacksonville, Florida USA
Status: 
Offline
I think Tom is on the right path with the blade hub grommet. You might try putting a paper shim in to see if it changes the noise.

Another possibility is that it's the grille, louvers, or some other part vibrating. You could also test this easily by applying pressure to the various pieces and seeing if the noise stops.

Back To Top PMQuoteReply

 Posted: Fri Jan 25th, 2019 03:47 pm
  PMQuoteReply
5th Post
Levi Mevis
AFCA Member


Joined: Tue Feb 24th, 2015
Location: Elkhart, Indiana USA
Status: 
Offline
I thought about that but it's not the grilles vibrating, or the handle vibrating. But I'll have to check into the rubber washer on the blade.

Back To Top PMQuoteReply  

 Posted: Fri Jan 25th, 2019 05:16 pm
  PMQuoteReply
6th Post
Michael Heffernan
AFCA Member
 

Joined: Mon Oct 12th, 2009
Location:  
Status: 
Offline
from the video you need another fiber washer. The air pull of the spinning blade is pulling the rotor almost in contact with the bearing surface. This is causing the noise you are hearing. As a test while the fan is running press on the shaft to see if the noise stops.

Back To Top PMQuoteReply

 Posted: Fri Jan 25th, 2019 06:35 pm
  PMQuoteReply
7th Post
Levi Mevis
AFCA Member


Joined: Tue Feb 24th, 2015
Location: Elkhart, Indiana USA
Status: 
Offline
That was the other thing I was wondering about but I've already got 3 fiber washers in the fan currently and when I tried it with 4 fiber washers the rotor barely spun, so I don't know... :wondering:

Back To Top PMQuoteReply  

 Posted: Sat Jan 26th, 2019 12:01 am
  PMQuoteReply
8th Post
Levi Mevis
AFCA Member


Joined: Tue Feb 24th, 2015
Location: Elkhart, Indiana USA
Status: 
Offline
i took and rearranged the fiber washers inside the fan motor so that instead of there being 2 in the front and one in the back there was 2 in the back and 1 in the front and it quieted the fan down significantly from what it was, there's still a little bit of noise when the fan is running in reverse but when the fan runs forward it makes no noise and that what matters the most because it will be running in forward mode most of the time anyways.

Last edited on Sat Jan 26th, 2019 12:02 am by Levi Mevis

Back To Top PMQuoteReply

Current time is 06:16 am  
AFCA Forums > Antique Fan Collectors Association > Post-1950 (Vintage) > 1955 Signal Box Fan Making Unusual Noises Top



Beige Theme By: Di @ UltraBB
UltraBB 1.17 Copyright © 2007-2008 Data 1 Systems
Page processed in 0.1480 seconds (10% database + 90% PHP). 27 queries executed.