Gyro from cardan disassembly
RESTRICTED
E. Gyro
from
Cardan
Fig. 17
See
Fig. 20
b. Air gap of 1/32 of an inch between
clapper magnet and clapper magnet
armature.
c. Brush plug should extend 1/4" from
brush holder.
A. Disassembly
1. Remove flexible leads.
2. Remove upper (counter-balance bail) and
lower (precession bail) bails.
3. Remove isolated sector contact brush.
4. Remove center screw from gudgeons.
5. Remove the four (4) screws from each
gudgeon.
6. Use two in each gudgeon to pull the gud-
geon.
7. Lift gyro from cardan.
8. Remove actuating shaft, clean, oil and
replace.
9. Check bearings using jeweler's loupe.
a. If the bearings are dirty remove and
clean.
(1) When removing a bearing always
replace screws exactly as they
were and never interchange bear-
ings.
(2) The following cleaning solutions
may be used.
(1) Tectyl No. 502
(2) No Foam
(3) L. & R. Rinse
When using the above use
in the order given.
(4) Benzine
(5) Acid-free kerosene
(6) Alcohol
CAUTION: Never spin a bearing that is dirty. This
damages the balls and race. A clean bearing will
turn freely. After cleaning inspect bearing with
a loupe.
Oil bearing after cleaning thoroughly and
replace. Two (2) drops of oil are usually enough
for the bearing; however, be certain that each
ball has a film of oil on it.
If gudgeon bearings are removed to clean be
certain that the locked bearing is replaced on the
side next to the isolated sector. The bearing
socket of the locked bearing has a flange which
holds the bearing in place. The center gudgeon
screw holds the bearing against the flange and the
socket is fastened to the gyro case with four (4)
screws. The bearing is thereby locked in its
movement in relation to the gyro.
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