C 13, TM 9-2350-230-12
Table 8-17. Preventive-Maintenance Checks and Services -
Continued
QUARTERLY SCHEDULE
ORGANIZATIONAL MAINTENANCE
Sequence
Item to be inspected
No.
Procedure
Reference
COMMANDER'S CUPOLA - M551A1 ONLY
35.1
Electrical
Visually check contact ring
Contact Ring
for dirt, moisture, and damage.
Use cleaning solvent and wipe
dry with clean lint-free cloth.
35.2
Electrical
Visually check contact brush
Contact Brush
assemblies for dirt, moisture,
Assemblies
damage, or excessive wear. De-
press each brush to make sure it
activates properly and does not
stick.
Clean dirt and debris away
with small soft bristle brush
and wipe with clean lint-free
cloth.
Operate cupola drive mechan-
ism by hand and visually check
to make sure each contact brush
aligns with its proper contact
ring track.
35.3
Index Point-
Inspect for loose or missing
ers
mounting hardware and bent or
damaged pointers.
35.4
Remote Switch
a. Inspect for loose or
Assembly
missing mounting hardware.
b. Inspect for loose or
damaged toggle switch.
35.5
Cupola/Laser
a. Inspect for loose or
Fig 10-35.2
Control Box
missing mounting hardware.
Assembly
b. Inspect for loose or
damaged toggle switches.
8-80