[Collins] In Re: KWS-1

[Dr. Gerald N. Johnson]

I'll agree with that. To get oil into a sealed bearing you can take the 
bearing out and lay it flat on a light bulb. Put a couple drops of fine 
sewing machine oil on the seals. Turn on the light bulb and let it heat 
the bearing (incandescent lamp, probably 60 or 100 watt), you should see 
air bubbling occasionally through the oil. When its hot, turn off the 
lamp and as it cools it will inhale the oil. You might want to replenish 
that oil supply as it cools and inhales all of it or repeat the heat and 
cool cycle. This also works for sealed clock telecron motors.

But if the bearing was rough besides being stiff oil may not help, metal 
may have migrated from the races to the balls or visa versa making it 
rough and oil won't help that. Then you need bearings. The bearings 
should have a number and should be available from a good bearing 
distributer, or Baum Hydraulics, www.baumhydraulics.com, McMaster-Carr, 
www.mcmaster.com or Small Parts www.smallparts.com.

Before you take the motor apart, its a good idea to scribe alignment 
marks for the end bells. Then take out the four long bolts and with a 
small hammer tap the end bells radially and they will pop off. I can't 
predict whether the bearings will stick to the motor shaft or to the end 
bell. Then on assembly line up the scribe marks so the holes in the end 
bells match the holes in the core for the long bolts.

A blower running significantly slow will not cool the PA tubes properly 
and they will be damaged.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association

On 10/21/2010 9:04 PM, Fern wrote:
>       I'm fortunate that the blower in my recently acquired kws-1 does come
> to speed right away. I do know of another ham where his blower takes a while
> to get up to speed so I spoke to Dennis Brothers about that he suggested to
> give the blower bearings a good lubrication and if that doesn't fix the
> problem then one should look at replacing the bearings in it.
>      73 from Fern  VE7GZ
>
>
> ----- Original Message -----
> From: "Greg Mijal"<bluebirdtele at embarqmail.com>
> To: "Dutch Maurer WB7DYW"<wb7dyw at yahoo.com>;<collins at mailman.qth.net>;
> "Fern"<crc at cyberlink.bc.ca>
> Sent: Thursday, October 21, 2010 10:49 AM
> Subject: In Re: KWS-1
>
>
>> Speaking of blowers and such:
>>
>> Is there anyway to determine if the blower is running at proper speed?
>> The
>> KWS-1 that's slowly coming out of a long slumber  here has a working
>> standard KWS-1 blower but it comes up to a maxium speed after about 1
>> minute
>> of turning. No squealing at all.  It makes me wonder if  that's normal or
>> should I replace/repair the blower itself.
>> Your thoughts?
>> Greg
>> WA7LYO
>> Kinston NC
>>
>
>