Gyro bearing precautions
RESTRICTED
the gudgeons and check the bearings for dirt.
cudgeon
bearings only when cleaned. Use I drop of
light
bombsight oil.
PRFCAIT IONS:
a.
D.
C.
d.
Do not attempt te oil the rotor bear-
ing with
a syringe unless expert en-
to apply just
enough
to the syringe
to obtain one and only
one drop of oil.
Use correct amount and grade
of oil.
Do not apply oil while unit
is mov-
Do not touch applicator to anything,
for dirt will be transferred
to the
oil,
and
thence to the bearing. A
metal applicator will also scratch
e.
Place oil directly on balls between
f.
Run unit for ten (10) minutes.
9. Clean commutator, brushes and
brush
tubes.
Cleaning.
3.
C.
d.
e.
Gyro must be stopped to clean.
Before removing brushes, scribe head
of brush plug and measure the amount
It extends from the brush tube. The
Tactory
recommended
1/4"
adjustment s
on the sight gyro.
Scribing
makes
replacement of the brush
and
plug to the
same position exact.
Use clean white cloth moistened
with
carbon tet. or benzine
(not alcohol)
over
the
end of
a soft wood
stick,
for cleaning commutators.
Keep us-
ing a new section of the
cloth
until
Cloth comes out clean after being in
contact with commutator. Scrape
be-
tween segments (away from bearing)
with wedge pointed orange stick. Never
use metal stick of any
kind for hold-
ing cloth on
commutator.
Use very small amount of alcohol or
carbon tet. for cleaning brushes and
brush tubes.
Do not use benzine.
If the commutator is rough or groov-
the gyro should be disassembled.
Use #400
aluminum oxide paper to re-
move roughness and grooves. Care must
Oi
ough
pressure
the
balls.
the
Cleaning.
a.
ed,
163