AFCA Forums Home
Home Search search Menu menu Not logged in - Login | Register

 Moderated by: Steve Cunningham, Stan Adams, Rod Rogers
New Topic Reply Printer Friendly
diehl oscillator issue  Rate Topic 
AuthorPost
 Posted: Fri Jan 29th, 2021 06:23 pm
  PMQuoteReply
1st Post
Roger Borg
Guest
 

Joined: Thu Jan 28th, 2021
Location: New Jersey USA
Status: 
Offline
hi all-i'm new to the forum, so this is my first post. i have a few old fans that i've picked up over the last several years, and use them all in the summer, meaning i do not use for decoration. they work much better than anything made nowadays, so i do my best to make sure they're usable and function properly for the long term.
that said, i've done some research on my question already and found some info in previous posts, but hope to better understand.

the basics:
i have a 16" chrome diehl fan, i believe it's from the mid 30s, but welcome any input as to its production date. the guy i picked it up from had it in his parents home dating back to the 60s, but i image it was already a couple decades old by the time he was a kid.
the label is hard to see, but it appears to read 16 712 1

background:
i have not taken much apart yet, but plan to clean it up and replace any wiring necessary once i get through my problem.
on the oscillator bulge on the back, there is a grease screw on top, a screw on bottom, a screw on the right, a screw on the back, and a screw on the left. the left side screw does not sit flush, and shows some stripping from someone trying to unscrew it. i was able to unscrew it with a vise grip, but after loosening it, it still will not screw in all the way.  
the grease inside is thick, but not solid or clumpy.
there is a set screw on the round oscillator part, that is seized. i do not want to force this, as it appeared from other posts there is a pin and spring in here. unless otherwise advised, i will let this be, as i'm not sure this is related to the problem.
there is another set screw on the bottom of the oscillator arm. this one unscrews freely.

issue:
sorry for burying the lede, but the problem i'm having is related to oscillation. it oscillates up to a certain point, and then stops. if it were a clock, (and this is from memory, not exact, so please pardon any mistakes in recollection) it would swing between 10 oclock and 2 oclock.
at some point around 11 oclock it stalls. a gently push will get it going past this point, and it will swing to 10, go to 2 unimpeded, and then return and stall again at the same point. it only stalls in one direction, not on the return trip.

hypothesis:
i imagine there is a gear with a missing tooth, but not sure how to safely take apart and inspect.

what i've done:
i unhooked the oscillator arm to see if that was causing any of the sticking, but the circle on the fan body still pauses in that spot regardless of connection to the arm.

so now that i've written a super long post, is there anyone that can chime in and offer a plan of attack?
nice to meet everyone, and many thanks in advance...

PS-
i can reattach the arm and post a video if that would be helpful.
and any other questions, just let me know...

best,
roger
































Back To Top PMQuoteReply  

 Posted: Fri Jan 29th, 2021 07:10 pm
  PMQuoteReply
2nd Post
Brice Nagelmaker
AFCA Member


Joined: Thu Nov 26th, 2020
Location: Tu, Iowa USA
Status: 
Offline
I have no idea how to gain access to the innards of that oscillator but when we figure that out i bet it's a worm gear. what ever you find wrong some one should have the parts. i have a 16 inch 4 blade green diehl, will check if it's the same.  My fan it missing what ever was under that set screw.

Last edited on Fri Jan 29th, 2021 07:13 pm by Brice Nagelmaker

Back To Top PMQuoteReply

 Posted: Sat Jan 30th, 2021 09:29 am
  PMQuoteReply
3rd Post
Lane Shirey
AFCA Member


Joined: Wed Apr 30th, 2014
Location: York, Pennsylvania USA
Status: 
Offline
First of all, that’s not how the oscillator arm is supposed to be detached.  To detach it, the tiny set screw in the knurled knob should be removed, then the knurled knob unscrewed. I forget if it’s left or Right hand thread.  
The other part should have remained within the oscillator drive disc.  There is also a sort of ratchet or pawl mechanism in there. Be sure you didn’t lose parts when taking it apart.  

Though your problem seems like a broken tooth or teeth. 

Back To Top PMQuoteReply  

 Posted: Sat Jan 30th, 2021 09:45 pm
  PMQuoteReply
4th Post
Brice Nagelmaker
AFCA Member


Joined: Thu Nov 26th, 2020
Location: Tu, Iowa USA
Status: 
Offline
clean the grease out and see what you need.  This will clean the chrome and protect whats left, really does a good job.

Attached Image (viewed 286 times):

shopping.jpg

Last edited on Sat Jan 30th, 2021 09:46 pm by Brice Nagelmaker

Back To Top PMQuoteReply

 Posted: Sun Jan 31st, 2021 01:28 am
  PMQuoteReply
5th Post
Chris Krenke
AFCA Member
 

Joined: Sat Aug 23rd, 2014
Location: Connecticut USA
Status: 
Offline
Check the shaft that connects the oscillator wheel to the gear above. I've got a 12" that was giving a similar headache. These parts are press fit onto the knurled shaft. My problem was the wheel slides down and disengaged from the shaft. Shaft spins, wheel doesn't. I placed the wheel on the bench, put a socket over the shaft n gear. Gave it a good whack, been good since. Enjoy it, the 12" is the best running fan I own. 

Back To Top PMQuoteReply  

 Posted: Mon Mar 22nd, 2021 07:00 am
  PMQuoteReply
6th Post
Roger Borg
Guest
 

Joined: Thu Jan 28th, 2021
Location: New Jersey USA
Status: 
Offline
hi all-following up on this earlier post, i cleared much of the old grease out of the gearbox, and spotted a few stripped teeth on the oscillating gear.
however, the gear and the disc below seem to be attached in a fashion that i can't figure out.
i want to remove this gear to try to repair, or better yet to replace (if anyone has this part for sale that would be wonderful).all advice and feedback would be greatly appreciated.
thanks...


Back To Top PMQuoteReply

 Posted: Mon Mar 22nd, 2021 01:58 pm
  PMQuoteReply
7th Post
Steven P Dempsey
AFCA Member


Joined: Tue May 15th, 2012
Location: Clarksville, Virginia USA
Status: 
Offline
I have a green "Command Aire" version on order, to add to my 10" & 12" collection - - the chrome fan I had was an amazing smooth running fan!!

Back To Top PMQuoteReply  

 Posted: Mon Mar 22nd, 2021 08:48 pm
  PMQuoteReply
8th Post
Chris Krenke
AFCA Member
 

Joined: Sat Aug 23rd, 2014
Location: Connecticut USA
Status: 
Offline

There's a roll pin on the top of the oscillator wheel that can be driven out. The gear above it on the shaft is knurled press fit. I believe Russ posted the patent drawing in a previous diehl oscillator post

Back To Top PMQuoteReply

 Posted: Mon Apr 12th, 2021 10:15 pm
  PMQuoteReply
9th Post
Roger Borg
Guest
 

Joined: Thu Jan 28th, 2021
Location: New Jersey USA
Status: 
Offline
i have removed the pin and freed the gear, which has a few broken teeth.i used jb weld and scored away the excess to rebuild the gear teeth, but don't think this is going to be a lasting fix.
someone i spoke to said maybe a jeweler could silver solder and i could file down, but no local jeweler has returned my calls.
someone else recommended laying down a weld and filing away, but that just seemed like to much heat for such a small part, at least from my days playing around with an arc and mig welder.

does anyone have any (other) ideas on how to rebuild the teeth?

lastly, is this part brass? it's half silver and half copper in color (pictured).
and lastly lastly, i will cross post on the buy sell trade forum, but does anyone have a replacement part they would consider selling.
a retail company had one, but it seemed a bit costly.

as before, thanks to anyone that replies...


.


Back To Top PMQuoteReply  

 Posted: Mon Jun 7th, 2021 07:05 am
  PMQuoteReply
10th Post
Roger Borg
Guest
 

Joined: Thu Jan 28th, 2021
Location: New Jersey USA
Status: 
Offline
Same project, new question.Not sure if a new thread is preferred by the community.

Anyway, I opened the fan to clean the years of accumulated dirt and dust.
Also, to solder a new head wire.
My question is how to separate the stator from the exterior housing.
Do I just give the back plate housing a few gentle taps?

Also also, the red circled area has a spring and what seems like a wick, but there is so much caked on grease that I can't yet tell.
However, there is no oil cup in the area.
There is only a cup in the front.
The photo is the underside of the oscillator area.


Any insight to both queries would be appreciated. 
Thanks...

Back To Top PMQuoteReply

 Posted: Mon Jun 7th, 2021 10:34 am
  PMQuoteReply
11th Post
Lane Shirey
AFCA Member


Joined: Wed Apr 30th, 2014
Location: York, Pennsylvania USA
Status: 
Offline
I believe that housing should tap off. Use a wood stick and hammer so you don’t damage the chrome.  Let someone else chime in before attempting as it’s been a while since I had a Diehl apart.  

Yes, that’s an oil wick and spring.  I’d use a fresh wick and I forget if it should use straight oil, or oil mixed with grease, since the opening is on the bottom.  Don’t want it to leak.  

Back To Top PMQuoteReply  

 Posted: Mon Jun 7th, 2021 03:12 pm
  PMQuoteReply
12th Post
Thomas Peters
AFCA Member
 

Joined: Mon Nov 16th, 2009
Location:  
Status: 
Offline
Put an ad in the BST section for your missing oil cup. Include a shot or two of your fan. Indicate whether for front or rear, in case of difference.

Back To Top PMQuoteReply

 Posted: Mon Jun 7th, 2021 03:25 pm
  PMQuoteReply
13th Post
Roger Borg
Guest
 

Joined: Thu Jan 28th, 2021
Location: New Jersey USA
Status: 
Offline
Thank you Thomas, b[size=ut the cup is not missing.][size=There is an existing screw cover holding in the spring.]
[size=I have 2 of these fans so I am certain it's not been changed.]
[size=I'm still a newbie, but I've just never seen an internal wick with no cup below, which this appears to be.]
[size=That is the aspect that confused me.]

Back To Top PMQuoteReply  

 Posted: Mon Jun 7th, 2021 03:27 pm
  PMQuoteReply
14th Post
Roger Borg
Guest
 

Joined: Thu Jan 28th, 2021
Location: New Jersey USA
Status: 
Offline
PS, for where the head wire enters the case, where can I purchase an appropriate rubber grommet?Is there a special source that members use, or just a trip to the local hardware store?

Back To Top PMQuoteReply

Current time is 06:37 pm  
AFCA Forums > Antique Fan Collectors Association > Pre-1950 (Antique) > diehl oscillator issue Top



Beige Theme By: Di @ UltraBB
UltraBB 1.17 Copyright © 2007-2008 Data 1 Systems
Page processed in 0.9251 seconds (84% database + 16% PHP). 29 queries executed.