[TheForge] Third HP motor problem

[Dan Brewer]

I would replace the capacitor.  Lots things go wrong with them  that do not
show up as physical damage.  You will also want to use compressed air or a
vaccume to remove any acculiated stuff from the motor.  If you have the
motor apart new grease for the bearings.  There is a small switch in some
of the motors that put the capicator in to the mix and then takes it out
when the motor reached speed.  Some times the switch gets stuck.  This is
where the cleanning comes in.  Look for burned wires or broken connections
also.
Dan in Auburn

On Wed, Dec 3, 2014 at 6:06 AM, Ron Childers <ron at munlaw.net> wrote:

> Small Delta belt grinder 1/3rd HP motor just hums but will finally run if
> the pulley is spun. The capacitor looks ok but we tried another although
> it's a higher MFD- I think it should run if the windings are ok. Probably
> no hope for the motor but the grinder is still ok. Any ideas?
>
> -----Original Message-----
> From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of
> David E. Smucker
> Sent: Tuesday, December 02, 2014 7:12 PM
> To: 'Blacksmithing List Sponsored by ABANA'
> Subject: Re: [TheForge] Harbor Freight quality
>
> Don't read horse power -- read run current (amps) and voltage.  Remember
> that it wasn't China that started this "hoorse power crap" but Sears.  (2
> horse power "American motors" put out no more work than any other country's
> motors rate in current and amps.
>
> Dave
>
> -----Original Message-----
> From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of
> Richardson, Grover
> Sent: Tuesday, December 02, 2014 3:14 PM
> To: 'Blacksmithing List Sponsored by ABANA'
> Subject: Re: [TheForge] Harbor Freight quality
>
> The main thing I tell my folk is to remember the motors.  A 2 horsepower
> American motor will put out 2 horsepower of work.  A 2 horsepower China
> motor is 2 horsepower lock rotor.  They take a vise grip (philosophically
> speaking) and hold the shaft, and apply power.  The power that enters the
> motor under "locked rotor" conditions, ie worse case, is the horsepower of
> their rating.  At best I figure a 2 hp China motor will do 1/2 to 3/4 hp.
> So when using my Harbor Freight chop saw, I load it down until I hear it
> slow down in rpm, and do a slow cut.  Had it over 10 years.  Used up at
> least 6 blades on it so far.
>
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