The Talking Machine Forum — For All Antique Phonographs & Recordings

It is currently Sun May 20, 2018 9:27 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 12 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: trouble with standard A motor
PostPosted: Fri Apr 20, 2018 9:57 am 
Offline
Victor I
Joined: Wed Aug 09, 2017 3:00 pm
Posts: 105
Every time I try to crank the motor it cranks a bit then loses it's tension and winds down uncontrollably. Any tips?
Pictures provided to see if anyone can see a problem

Thanks

V6


Attachments:
motor2.jpg
motor2.jpg [ 118.45 KiB | Viewed 272 times ]
motor1.jpg
motor1.jpg [ 130.79 KiB | Viewed 272 times ]
Top
 Profile  
 
 Post subject: Re: trouble with standard A motor
PostPosted: Fri Apr 20, 2018 10:43 am 
Offline
Victor V
Joined: Mon Oct 03, 2011 7:54 pm
Posts: 2201
The spring is probably broken.


Top
 Profile  
 
 Post subject: Re: trouble with standard A motor
PostPosted: Fri Apr 20, 2018 10:59 am 
Offline
Victor I
Joined: Wed Aug 09, 2017 3:00 pm
Posts: 105
How do I tell?


Top
 Profile  
 
 Post subject: Re: trouble with standard A motor
PostPosted: Fri Apr 20, 2018 11:10 am 
Offline
Victor III
Joined: Sat Oct 24, 2015 10:46 pm
Posts: 878
Location: riverside calif
It could be a little gear in the middle of the motor that is slipping. Wind it up a bit holding different gears and work your way out. That is if the spring holds tension. You may have a gear slipping which will not engage the governor. Try holding the big gear to wind it. If it lets loose and you can hear it slip inside the spring canister than you have a bad spring. Please wear gloves when getting into springs and gears.. Sometimes the spring inside the canister can slip off their pin when they unwind and slip but most of the time they are broken. You have to open it up to check. Tom


Top
 Profile  
 
 Post subject: Re: trouble with standard A motor
PostPosted: Fri Apr 20, 2018 11:10 am 
Offline
Victor V
Joined: Mon Oct 03, 2011 7:54 pm
Posts: 2201
If you're winding it and you hear a rapid sh-sh-sh-sh-sh-sh sound, that's the broken spring rotating in the barrel.

You can disassemble the motor and open the spring barrel to be sure, or just send it out to one of the pros to check it for you. Springs can sometimes be repaired depending on where they break, but you might as well just buy a new spring.


Top
 Profile  
 
 Post subject: Re: trouble with standard A motor
PostPosted: Fri Apr 20, 2018 1:40 pm 
Offline
Victor I
Joined: Wed Aug 09, 2017 3:00 pm
Posts: 105
tomb wrote:
It could be a little gear in the middle of the motor that is slipping. Wind it up a bit holding different gears and work your way out. That is if the spring holds tension. You may have a gear slipping which will not engage the governor. Try holding the big gear to wind it. If it lets loose and you can hear it slip inside the spring canister than you have a bad spring. Please wear gloves when getting into springs and gears.. Sometimes the spring inside the canister can slip off their pin when they unwind and slip but most of the time they are broken. You have to open it up to check. Tom


Which little gear? Thanks


Top
 Profile  
 
 Post subject: Re: trouble with standard A motor
PostPosted: Fri Apr 20, 2018 6:07 pm 
Offline
Victor III
Joined: Sat Oct 24, 2015 10:46 pm
Posts: 878
Location: riverside calif
If you look straight down in the motor there is a little drive gear that goes with a larger gear in the middle towards the bottom. That gear is pressed on the shaft and sometimes comes loose. I do not have a good picture of it available Look straight down in your motor and it looks like the one attached to the large gear. Also I can not tell but it looks like the small gear that is attached to the main drive gear is worn. That may be slipping. It is hard to tell for your picture but the first thing to check is your spring which is the most common. Tom


Top
 Profile  
 
 Post subject: Re: trouble with standard A motor
PostPosted: Fri Apr 20, 2018 11:08 pm 
Offline
Victor V
User avatar
Joined: Tue Dec 14, 2010 1:17 am
Posts: 2746
Location: Where there's "hamburger ALL OVER the highway"...
Looks like a Standard B motor to me.

But the diagnosis is the same: if it's not a broken spring, it's a loose gear.

Bill


Top
 Profile  
 
 Post subject: Re: trouble with standard A motor
PostPosted: Sun Apr 22, 2018 4:46 pm 
Offline
Victor IV
Joined: Mon Aug 24, 2009 3:08 pm
Posts: 1885
Location: Harrison Township, MI
Hard to tell from your photos, but it looks like you've got some really bad gears. Can you do a close-up shot on the gears? Aside from that possibility, you have a broken spring. If you wind it, with the motor stopped, and hear the spring tension release, but see no parts spinning out of control, then the commotion is within the spring barrel and the spring is broken.


Top
 Profile  
 
 Post subject: Re: trouble with standard A motor
PostPosted: Sun Apr 22, 2018 10:02 pm 
Offline
Victor V
User avatar
Joined: Tue Dec 14, 2010 1:17 am
Posts: 2746
Location: Where there's "hamburger ALL OVER the highway"...
JerryVan wrote:
Hard to tell from your photos, but it looks like you've got some really bad gears. Can you do a close-up shot on the gears? Aside from that possibility, you have a broken spring. If you wind it, with the motor stopped, and hear the spring tension release, but see no parts spinning out of control, then the commotion is within the spring barrel and the spring is broken.


Agreed: that intermediate gear looks pretty chewed up.

Bill


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 12 posts ]  Go to page 1, 2  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: fmblizz and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Americanized by Maël Soucaze.