Restoring the SB-630 clock PART 3

[charles w. morehouse]

Plan B,
You can rebuild the original motor if you are lucky. You must have a
drill press, a set of number drills, a number drill gauge and small
punches screwdrivers etc. and patience.
A. Find a similar motor that is running. There are lots of them around.
The speed of the output is unimportant as you will use the original
gears. Try appliance parts stores and used appliance dealers. Mine came
out of a junk drier.
B. Scrape the sealant from both gear cases and remove using a very small
screwdriver.
C. Use an 8-32 nut screwed on the shaft in a vise and punch off the
output adapter. Save as this the critical part. Retain the four gears
from the original.
D. Remove the motor covers and using a punch remove the motor gear.
be careful not to damage the rotor. Set them aside.
E. Using a 2-56 tap drill, drill out the three spot welds in the center
of the original motor. Use the proper countersink to remove the spot
weld and carefully pry out the motor center . Remove the winding spool.
F. Using any drill do the same for the new motor and remove the good
winding spool.
G. Drill and tap the old motor for 2-56 countersunk screws.Ressamble
motor.
H. If the output bushing is sloppy the clock will not advance properly
so
you must fix it. Get some brass rod of the proper size from the hobby
store. Drill and fill the bushing and solder. Next carefully center and
drill for the shaft.
I. Tap the screw adapter back onto the output shaft.
J. Reassemble the gears using some luberplate grease and snap on the
cover.
K. Seal the gear cover with JB weld and WALA a new motor.
Wayne;
W4GBW

Sponsored by the City of Tempe 

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