Brushes.
It is very important to make sure that the three brushes work
freely in their holders. This can 'easily bme ascertained bp holding back the
spring and gently pulling each flexible lead, when the brush should move
without the slightest suggestion of sluggishness. The brushes should be clean
and should
"
bed
"
over the whole of their working surface; that is to say,
the face in contact with the commutator should appear uniformly polished.
Dirty
brush'es may be cleaned with a cloth moistened with petrol.
If
any of th,e brushes become so badly worn that it is necessary to replace
them, this is accomplished by rel'easing the brush lead epel'et by removal of
of the screw then, while holding the spring
I'ever back out of the way, with-
drawing the brush from its holder. The new brush can then b'e fitted by
reversing the operation.
W~TH~RAWAL
BOLT
When ordering new brush replacements state whether they are
main
or
control brushes, and for what type of machine they are required.
The brush springs should be inspected occasionally to see that they have
sufficient tension to
kteep the brushes firmly pressed against the commutator
when the machine is running. It is particularly necessary to keep this in
mind when the brushes have been in use for a long
time and are very much
worn down.
Readers are cautioned that it is unwise to insert brushes of a grade other
than that supplied with the machine, or to change the tension springs.
The
arrangement provided has been made only after many pears' 'experience, and
will be found to give the best results.
PAGE
FORTY-FOUR
D/I
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