DIYAPASON-L Digest #398 - Wednesday, September 26, 2001
 
Re: DIYAPASON-L Digest #397 - 09/25/01
  by "Robert P. Bass" <rpbass@earthlink.net>
Re: [Residence Organs]  Re: DIYAPASON-L Digest #397 - 09/25/01
  by <Mpmollerorgan@aol.com>
Re: Spencer blower, Century motor
  by "Jon Fick" <jon@VermontFicks.org>
Re: [Residence Organs]  Re: Spencer blower, Century motor
  by "Ed Steltzer" <steltzer@gwi.net>
Re: [Residence Organs]  Re: Spencer blower, Century motor
  by <Pipewheezr@aol.com>
Re: [Residence Organs]  Re: Spencer blower, Century motor
  by "Eric Sagmuller" <ess4@psu.edu>
Re: [Residence Organs]  Re: Spencer blower, Century motor
  by <GRSCoLVR@aol.com>
Re: [Residence Organs]  Re: Spencer blower, Century motor
  by <GRSCoLVR@aol.com>
 

(back) Subject: Re: DIYAPASON-L Digest #397 - 09/25/01 From: "Robert P. Bass" <rpbass@earthlink.net> Date: Tue, 25 Sep 2001 22:32:57 -0800   Jon,   Howdy. One suggestion might be to call a distributor for Century Electric Motors... ( Yes, they are still around, but normally only deal = with custom orders ). Via the net, found TEMco. Apparently they are = one (and maybe the only <g>) distributor for Century. The web site can be found at http://www.electricmotorsale.com I have never = personally dealt with them.   A 1/2 HP motor is so very common. Normally they are built in a NEMA 48, 56, or a variation of the 56 Frame. Long shaft and short = shaft versions are available from most all manufacturers. While a newer = motor will not have Century's thermal stability, they would run more = efficiently.   If the exact match can not be found, a idea might be to get a motor with a longer shaft & have your local machine shop cut it down to size (along = with modifying the keyslot and adding a shaft-end center point for latter use = if you need to remove the fan(s)).   You could also have your local rewind shop look over the existing motor. =   They may be able to repair the start mechanism (assuming that wear is = the problem).   Best Regards, Bob Bass      
(back) Subject: Re: [Residence Organs] Re: DIYAPASON-L Digest #397 - 09/25/01 From: <Mpmollerorgan@aol.com> Date: Wed, 26 Sep 2001 02:04:32 EDT     In a message dated 9/26/01 12:42:35 AM, rpbass@earthlink.net writes:   >'s thermal stability, they would run more efficiently. > > If the exact match can not be found, a idea might be to get a motor = with > >a longer shaft & have your local machine shop cut it down to size (along >with modifying the keyslot and adding a shaft-end center point for = latter use >if you need to remove the fan(s)).   Why not just a shaft coupler on the end of the motor shaft then you can = add any length of shaft needed, they usually seem to come several inches long with several heavy duty allen set screws.       Randall http://members.aol.com/mpmollerorgan/  
(back) Subject: Re: Spencer blower, Century motor From: "Jon Fick" <jon@VermontFicks.org> Date: Wed, 26 Sep 2001 10:26:33 -0400   Thanks for the replies, both public and private. A sysnopis of the advice I've gotten is:   1) Bring the motor to a qualified shop. I suspect that "qualified" is the keyword here. Two motor shops in my area claim to handle these repulsion-start motors but conversations don't instill any confidence that when I re-install the motor it won't exhibit the very same symptoms. But I'm sure a qualified shop is indeed an answer.   2) Don't use a new direct drive motor. At the very least it's the wrong RPM. If memory serves, usual lower-speed motors run at ~1725 RPM's and = the Century motor is ~1400 RPM. That's a sizable increase; more than I'd be comfortable with. Belt driving could correct this though proper pulley selection. If I did use a new motor I would install a new drive shaft = with pillow blocks. That way there would be sealed bearings all around.   3) And a third option that I've avoided thus far is to bite the bullet and remove the Century motor completely so that I can remove the front plate = and inspect the centrifugal flyweight assembly carefully. It would be a good opportunity to clean and restore the whole thing.   I'll keep you folks posted.   Thanks.   Jon Fick      
(back) Subject: Re: [Residence Organs] Re: Spencer blower, Century motor From: "Ed Steltzer" <steltzer@gwi.net> Date: Wed, 26 Sep 2001 10:33:24 -0400   Like Jon, I have a 1/2 HP Orgoblo, Century motor, with sticky start-up throw-out.   I'm quite willing to take the motor apart to find and fix the problem, but haven't tried yet because it isn't clear how to get the long front shaft = of the motor out of the blower. I wouldn't be surprised if the rotor (2 stages, I think) is very tight and hard to remove from the extended shaft. Any thoughts? Ed, in Maine.   ----- Original Message ----- From: "Jon Fick" <jon@VermontFicks.org> To: "Diyapason" <DIYAPASON-L@pipechat.org> Sent: Wednesday, September 26, 2001 10:26 AM Subject: [Residence Organs] Re: Spencer blower, Century motor     > > 3) And a third option that I've avoided thus far is to bite the bullet = and > remove the Century motor completely so that I can remove the front plate and > inspect the centrifugal flyweight assembly carefully. It would be a = good > opportunity to clean and restore the whole thing. > > I'll keep you folks posted. > > Thanks. Jon Fick      
(back) Subject: Re: [Residence Organs] Re: Spencer blower, Century motor From: <Pipewheezr@aol.com> Date: Wed, 26 Sep 2001 10:41:02 EDT     --part1_135.22f448b.28e342fe_boundary Content-Type: text/plain; charset=3D"US-ASCII" Content-Transfer-Encoding: 7bit   Hi Jon one more idea. I saw fellow put a new motor through the old motor = with pulleys and belts. He used the old motor as the jack shaft. No special fan =   mounting to deal with. I have a machine shop and if you get stuck I will help you out.   Have fun Dennis   --part1_135.22f448b.28e342fe_boundary Content-Type: text/html; charset=3D"US-ASCII" Content-Transfer-Encoding: 7bit   <HTML><FONT FACE=3Darial,helvetica><FONT SIZE=3D2>Hi Jon one more idea. I = saw fellow put a new motor through the old motor with pulleys and belts. = He used the old motor as the jack shaft. No special fan mounting to deal = with. <BR>I have a machine shop and if you get stuck I will help you out. <BR> <BR>Have fun <BR>Dennis</FONT></HTML>   --part1_135.22f448b.28e342fe_boundary--  
(back) Subject: Re: [Residence Organs] Re: Spencer blower, Century motor From: "Eric Sagmuller" <ess4@psu.edu> Date: Wed, 26 Sep 2001 10:55:52 -0400   Check out the following on line Spencer manual. I think it covers pretty much all sizes and has a pretty thorough repair procedure.   Eric   http://barton.theatreorgans.com/orgoblo.htm       At 10:33 AM 9/26/2001 -0400, you wrote: >Like Jon, I have a 1/2 HP Orgoblo, Century motor, with sticky start-up >throw-out. > >I'm quite willing to take the motor apart to find and fix the problem, = but >haven't tried yet because it isn't clear how to get the long front shaft = of >the motor out of the blower. I wouldn't be surprised if the rotor (2 >stages, I think) is very tight and hard to remove from the extended = shaft. >Any thoughts? Ed, in Maine.    
(back) Subject: Re: [Residence Organs] Re: Spencer blower, Century motor From: <GRSCoLVR@aol.com> Date: Wed, 26 Sep 2001 13:16:25 EDT   Jon,,, Century Repulsion Start motors are not rocket science. They are pretty straight-forward machines that really dont have any surprises inside = except possibly the "necklace" inside the commutator that shorts out all the bars =   when the brushes lift to turn the rotor into essentially an induction = motor. Gunk,,,dried grease,oil and such is the culprit over many years. I am sure if you carefully take it apart and clean everything up and = replace everything just as you found it minus the dirt grease and gunk, it will = work again just fine again for many many years. Having worked with these motors for near 50 years now,,,I do have some experience, and reinventing the wheel seems to me to be a bad move. There = are shops that will rebuild, can rebuild, and still get the parts somewhere = that are necessary. However,,,,recently I did hear of a 2 HP being rebuilt in NYCity that cost 3K bucks when completed. I have never replaced anything = but brushes and I cut them down myself these days from larger ones, that are available anywhere. The "necklace" can always be cleaned up and any "flashing" thats encountered is easily taken care of with a file, on the necklace segments. I would vote for your taking it apart and cleaning it up. Just my personal opinion. If I can be of assistance,,,,dont hesitate to write, or call. Good luck, Regards, ---Roc L V Rockafellow  
(back) Subject: Re: [Residence Organs] Re: Spencer blower, Century motor From: <GRSCoLVR@aol.com> Date: Wed, 26 Sep 2001 13:40:18 EDT   Ed,,,,,,just my 2 cents worth---but-- I have been working with Spencer blowers and Century motors for about 50 years now,,,and have never seen a Spencer that heating the hub of the fans =   with a Bernz-o-matic torch keeping it away from the motor shaft,,,would = not loosen the hub up enuf to pull the fan off,,,Use heavy gloves with the fans,,,they are sharp on all edges. Hope this helps. ---Roc L V Rockafellow