TM 55-6680-234-40
piece of soft pegwood freshly tapered
(1) Clean all metal parts, except as
for each jewel.
noted, in solvent, Federal Specifi-
cation PD-680. Use a soft brush;
(5) Be certain any deposits of grease
or other foreign matter are cleaned
dry thoroughly. Keep parts free from
from pins, insulation, and threads of
dust particles until reassembled.
receptacle assemblies.
(2) Wash dial and glass cover with pure
(6) Clean pointer assemblies with a soft
soap and water being extremely care-
eraser such as art gum.
ful to avoid damage to dial paint.
Rinse and dry; keep parts free from
9. Inspection
finger marks until reassembled.
Inspect the disassembled indicator in ac-
(3) Clean all bearings in P-D-680 sol-
cordance with the following steps.
vent and dry thoroughly. Do not
(1) Visually inspect all metal parts, as
handle cleaned bearings with bare
applicable, for breaks, cracks, nicks,
fingers; use lint free gloves or suit-
s c r a t c h e s , scoring, stripped or
able tools. To avoid corrosion, in-
crossed threads, corrosion, distortion,
spect and relubricate bearings im-
worn plating, pitting, gouging, or
m e d i a t e l y after they have been
other obvious defects.
cleaned as outlined in (1) above.
(2) Perform nondestructive inspection as
specified in table 5.
(4) Clean jewel (6 of figure 5) with a
Table 5. Nondestructive Inspection Test Data
Allowable
Type of
Descriptive
Procedure
Item No.
Nomenclature
Test
Defects
Inspect for bent,
No defects
Visual
33 of figure 7
Receptacle
broken, and loose
Assemblies
acceptable.
terminal pins, for
cracked, damaged,
and loose insulation,
and for stripped
and damaged
threads.
Examine for chips,
No defects
2 of figure 7
Glass Cover
Visual
cracks, and dis-
acceptable.
coloration.
Examine for
No defects
Pointer Assemblies Visual
6 & 7 of figure 7,
chipped and dam-
acceptable.
10 of figure 8
and Dial
aged paint.
No defects
Inspect for dam-
20 of figure 7,
Bearings
Visual
aged raceways and
3 & 17 of figure 8,
acceptable.
bearings.
12 of figure 9, 2 of
figure 10, 17 of
figure 10, 12 of
Visual (under
Inspect before and
No defects
6 of figure 8
Jewels
magnification)
acceptable.
after installation,
for cracks and
wear.
Examine for
No defects
Visual
12 of figures 8 & 10
Hairsprings
acceptable.
twisted, distorted,
and improperly
wound convolutions.
10
