[GreenKeys] AC Sync Wire Lead

[John Nagle]

On 11/27/2016 06:04 PM, greenkeys-request at mailman.qth.net wrote:
>>>> In a message dated 11/26/2016 7:15:44 P.M. US Mountain Standard Time,
>>>> kevin.dewitt at gmail.com writes:
>>>>
>>>> Greetings
>>>>
>>>> My latest WU 2B with the 3A Gumming Table is getting a new-to-it AC
>>>> Synchronous Motor. Upon attempting the install it has been determined that
>>>> the cloth covered wire insulation on the leads is much crunchier than I
>>>> like. The leads appear to be about 16 gauge. The leads on the other 2B I
>>>> have are closer to 18 gauge. I checked it with a meter and it wasn't
>>>> shorted but I do not trust it.
>>>>
>>>> So, it seems to me like the next step would be to (gently) pull the fan
>>>> and attack it from that end but wasn't there some discussion about
>>>> difficulty in (pulling the fan) several years ago? I tried to search the
>>>> archives but found nothing. So, rewire or no and if so can i get away with
>>>> 18 gauge?
>>>>
>>>> Motorless in Ohio
>>>>
>>>> Kevin/ww2tty

    Removing the fan is easy. You need a long screwdriver to remove its
setscrew. The setscrew goes all the way through the shaft, in a threaded
hole - Teletype and GE didn't cut corners here. So it has to be
removed completely.  Re-installation of the fan screw is best done with
a magnetized screwdriver.

    Normal DC resistance for Model 14/15 Teletype motors is 4 ohms.
Check for infinite resistance between wires and frame.  Also,
blow them out with compressed air.

    I install a 3 amp slow-blow fuse on all my 14/2B machines.  The
original 14 design lacks a fuse.  I also run them from control
units that are equipped with a GFCI.  I've had bad motors trip the
GFCI on two occasions.

				John Nagle