Gyro removal from cardan
RESTRICTED
CAUTION:
Remove locking screws from gyro gudgeons.
Remove
gudgeons, use
gudgeon screws i-
puller arrangoment and support gyro with hand
to prevent binding of gudgeons.
Tilt gyro
and cardan and
with hand under
gyro lift up.
Then grasp
gyro with other hand and
and lift guro clear
g.
lubricate gudgeon bearings
of cardan.
If gudgeon bearings are
dirty, clean and
lubricate with one or two drops of light bombsight
placed in tại sat t
Be certain that the fudgeon bearings are re-
placed in the same position as before removal. The
locked
bearing is to the rear.
10. If commutator is dirty, remove the brush-
es before
cleaning
commutator.
11. If
brushes
are
removed:
a.
Remove terminal screw connecting pig
tail to brush holder.
b.
Measure the distance
the brush
plug
extends
from the
holder and
scribe
theplug so that it may be
reinstall-
ed to its original position.
Clean the brushes with alcohol or
carbon tet. and check for contact.
d.
e.
Clean commutator and
brush tubes.
Reinstall brushes and connect term-
inals.
B.
Reassembiy.
Replace the gro gudgeon bearings.
Grasp gyro firmly and lower into piace
in the cardan.
While
holding gyro align the rear gud-
geon bearing and the gudgeon hole in the
rear of the cardan.
a.
Insert gudgeon pin.
If
the bearing
is not exactly aligned the gudgeon
willnot fit into the bearing.
Work
gudgeon with fingers until the flange
of the gudgeon is in place. NEVER
FORCE
A GUDGEON INTO PLACE.
THIS
WILL BURR THE GUDGEON AND THE BEAR-
ING LOCK PLUG.
Replace front
gudgeon and tilt gyro
to check
for freedom of movement.
With cardan nearly ievel and gyro ap-
proximately vertical tap gyro.
should tilt easily and freely to
either side.
137