Re: Starting up a DM-21 Dynamotor

First I'd make sure that I could turn the rotor by hand and then check the
conidtion of the brushes and commutator.  If the old lube is dry you might
try adding a drop of good oil (turbine oil available at appliance stores)
and see if that frees it up.  Next start it with no load and see how it
comes up to speed.  If it's quiet and running smooth I'd apply the load.
Don't use too much oil, a drop or two is usually all you need.
regards
hank wd5jfr
"Derek Cohn/WB0TUA" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Dear Friends,
>
> I just picked up a BC-314-G (MW version of BC-348).  It came out of
> the estate of a long deceased ham so I don't know how recently it was
> used.  I would like to begin the restoration process and will start
> with the dynamotor.  I have read TM11-850 N which covers this radio
> and the only maintenance mentioned for the dynamotor is one drop of
> oil in the bearings.
>
> If I'm going to start up a dynamotor that hasn't been run in a long
> time, does this one drop of oil in the bearings sound sufficient?  Is
> there any other recommended maintenance to get this thing lubed
> properly so I don't burn up the bearings when applying power?  Also,
> it's a 12 - 14v dynamotor.  Is it recommended to start it on very low
> voltage and increase it slowly to the recommended operating voltage?
>
> Thanks for any help you guys can give me!
>
> 73,
>
> Derek
> WB0TUA