TM 11-6625-3081-23
5-28. FIELD LENS ASSEMBLY REPLACEMENT (cont)
5-28
TRICHLOROETHANE
FLAMMABLE, TOXIC, IRRITATING. CAN
CAUSE BREATHING PROBLEMS, EYE
DAMAGE.
AT 325°F, GIVES OFF PHOSGENE GAS,
WHICH CAN CAUSE DEATH OR SERIOUS
INJURY.
DON’T:
USE NEAR FLAMES OR SPARKS,
LET IT GET ON SKIN, OR BREATHE
VAPORS.
DO: USE IN WELL-VENTILATED AREA,
CLOSE CONTAINERS WHEN NOT USING.
WEAR ACID-TYPE SAFETY GOGGLES,
RUBBER GLOVES, AND RUBBER APRON.
IF IT CONTACTS SKIN OR EYES, WASH
AFFECTED AREAS WITH RUNNING WATER.
GET MEDICAL HELP AT ONCE.
IF YOU EXPERIENCE ANY BREATHING
PROBLEMS, GET TO FRESH AIR AT
ONCE.
2. Using trichloroethane, clean old
sealing compound from threads of
field lens assembly mounting screws
(1) and from threads in sensor mount
bracket assembly (3).
INSTALLATION
Do not touch optical surfaces of
field lens assembly to avoid damage.
3. Coat field lens assembly mounting
screw threads (1) with sealing com-
pound primer.
Allow to cure for 15
to 30 minutes.
NOTE
Assemble screws into final position
within 10 minutes after application
of sealing compound.
4.
Coat threads of primed screws with
sealing compound.
5.
Position field lens assembly (2) on
sensor mount assembly (3) and secure
with four screws (l).
6.
Allow sealing compound to cure for
5 hours minimum at no less than
45°F.
END OF TASK
5-125
