I replaced the capacitor but like before the motor just hums and then trips the
circuit breaker. What else could it be. It did this earlier and I cleaned
off the contacts on the original capacitor and it worked for a while. After it
stopped working again I presumed it was a bad capacitor so I replaced it only to
find that there must be another problem. When I turn the shaft by hand there
seems to be a drag, it doesn"t turn freely. Is there possibly something
connected with the brake that is not releasing??????
wrote in message
On Fri, 19 Jul 2013 02:51:25 +0000, Jerry
Sounds like the brushes to me.
Usually no brushes on a cap start motor.
If it is a cap run ???
If it is a cap start look for a centrifugal switch contact to cut off
the start cap. Sawdust and sparking in dust burn it out. Some used a
current sensor to cut off the cap. After the RPMs get up the lower
current drops out the contact to the cap. Remove the end bell of the
motor . Make sure to scratch alignment marks in both end bells across
the main housing first.
On 07/18/2013 07:58 PM, email@example.com wrote:
I don't think the Searz RAS uses a universal motor, hence no brushes.
Having had a PowrKraft (Montgomery Ward) RAS, and now a Searz RAS, the
decrease in noise level is the second clue. The capacitor on the OP's
RAS is the first clue.
Could very well be the centrifugal switch that removes the start
capacitor from the circuit once the motor is running.
If so, it is a total PITA to replace since you have to open up the
Lew may very well be correct.
I had a similar problem with my Sears RAS last year.
It turns out that the motor was LOADED with about a pound and a half of
very fine sawdust. The sheer volume was preventing the the centrifugal
switch from doing its' job. It wasn't broken, it just wouldn't switch
from start to run because it was packed almost full with the dust.
The solution that worked for me was to remove the motor from the arm,
open it up, vacuum what I could, and then blow the living hell out of
it with compressed air. The last part I would recommend be done outside
if your airline is long enough ;-)
Lew is also correct, it is a PITA to take it of and get to the insides,
but in the end, it was worth it. Purrs like a kitten once more.
Another possible solution is Craig's list. Sears' RAS sell anywhere
from $75 to $150 in my area (SE Pennsylvania). It would be a cheap
source for a replacement motor if I needed one.
I also had a Sears Table Saw motor that the solution to the non start
was a thorough internal cleaning. They are fairly simple to disassemble.
As part of the cleanup with each use all openings on the motor gets
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