Brush pigtails
RESTRICTED
C.
Shaping
Flexible
Leads and
Pigtails
2.
b.
of end of pigtail and refold that in half,
leaving
lead
to brush
coming between
the
folds,
then clamp terminal over the
thicknesses.
four
Do not cut the ends of the
pigtails.
They are cut to exact length at
the factory.
Use no
soider on connections, as solder
destroys the balance of
the gyro. Brush
should make a
minimum
of 85% contact with
the commutator.
This is obtained
by run-
ning in brush
for a
few minutes,
then
the high spots (bright
spots)
with a sharp straight edged tool.
Run in
again
and
recheck.
Continue until
рго-
perly
seated. CAUTION: Scrape very ligh
tly •
The
brush nuts should be turned
down to
exactly the same position as before re-
moval.
The factory
recommended
adjust-
ment is, with
the
sight
gyro.
made in
ing tension on
sion is
trust us nor in
the nut extended,
on
No change
should be
this setting to adjust the spr-
brushes.
If the
ten -
not correct with this adjustment
the cause is a defective spring or worn
Flexible leads.
The flexible leads from the case to the
cardan
and from
cardan to
the gyro,
heart shape in the M-3 and S shaped
i n
the M-6.
b.
I n
shaping
the flexible leads care must
be
used
or leads will be damaged.
Use
an orange stick or glass rod to shape the
leads.
Do not use a piece of metal as
the jagged edges will damage the insula-
tion
and shorten the usefulness of the
lead.
C.
Always check to see that leads do not
touch
each other or anything as gyro is
moved through its limits.
d.
Always check before turning on bombsight
switch.
Pigtails.
Pigtails are shaped so that they enter
the brush plug
at an angle of 1800
curved to the terminal so that they
do
not touch anything as the gyro is pre-
cessed.
scraping
brush.
a.
the
are
a.
165