brush should be pushed down into the brush holder a few times to be certain
that it will travel or slide freely in and out of the bolder. If governor
brushes and springs are not in first class condition as outlined above they
should be replaced.
13. Fitting the Governor (100) on the Armature Shaft
The governor assembly should be thoroughly examined before placing on the
armature shaft. First inspect the brass collector rings on the back of the
disc. If these are badly pitted or burned the governor (100) should be
replaced unless it is possible to face off the rings in a lathe. Care must
be taken, if this is done, to obtain a smooth cut and above all to see that
the governor disc runs true on the arbor before and after facing. This is
very important as a noisy motor, excessive governor brush wear, and worn
bearings will result if disc does not run true, or if it is thrown out of
balance. There is a limit to the amount of the cut or to the number of cuts
that can be taken off the rings, because if the heads of the rivets which
hold the rings to the Bakelite disc are cut away the rings will be thrown
off at high speed.
13-A. Next examine the tungsten contact breaker point (102) mounted on the end of
the lever arm. If badly pitted or burned the governor assembly (100) should
be replaced. No filing, bending or changes should be made on the tungsten
points, or on the lever arm. It will be noticed that there are two lever
arms (102 and 103) on the disc but as explained in the introduction to this
bulletin close observation will show that only one arm is fitted with
tungsten points. The other points are larger and are made of cold rolled
steel. These C.B.S. points carry no current but are for the purpose only of
balancing the governor at all speeds.
13-B. After examination has showed the governor (100) to be in good condition or
that a new one is necessary place governor on the armature shaft. First
observe the depression on the armature shaft and place the governor on the
shaft so that governor set screw (101) can be screwed into the depression,
or hole, in the armature shaft. The governor brushes (97) must be forced
back into the brush holders carefully as the governor is pushed onto the
shaft so brushes will not be damaged or broken. Be certain that the set
screw (101) is turned with the Allen Head Wrench until it is tight and that
no wires are rubbing, as the governor is revolved by hand. The governor and
armature should revolve FREELY.
The operation of the motor may now be checked by plugging the cord into a
socket and carefully closing switch (105) with a pencil or round stick in
much manner that it will not be struck by the governor (100) when it
rotates. Motor should operate on “high” speed only.
14. Fitting Switch Knob (70) and Switch cover (71) Assembly
Examine parts to see that the governor slide assembly (113) travels in and
out as the switch knob is turned, when held in the normal position. The
switch rod (115) should be thrust forward as the switch knob leaves the
“OFF” position on the outside of the cover, and should stay out for the
remainder of the travel of the governor slide.
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