3.2 PREVENTIVE MAINTENANCE CHECKS AND SERVICES PMCS
3.2.1 PURPOSE OF PMCS
PMCS should be performed daily when the PVS-7 is in use in order to ensure that the sight is mission-
ready at all times. Procedures are a systematic inspection of the goggles that will enable you to discover
defects that could cause the PVS-7 to fail on a mission.
3.2.2 FREQUENCY OF PERFORMING PMCS
You should perform PMCS as follows:
A. Daily when the PVS-7 is in use.
B. Weekly when in standby condition.
C. Semi-annually when stored in depot or administrative storage.
3.2.3 PERFORMANCE OF PMCS
Preventive maintenance checks and services should be performed in the sequence and inspection
procedures indicated in Table 3-2.
TABLE 32. PREVENTIVE MAINTENANCE CHECKS AND SERVICES
SEQUENCE
NO.
ITEM TO BE INSPECTED/
PROCEDURE
1
GOGGLES - Check for completeness, including accessories. Check for dirt and moisture on
external surfaces and parts. Clean and dry with a lint-free cloth.
2
SHIPPING CASE - Check for dirt, moisture and mildew. Clean with a mild detergent and
water. Dry with a lint-free cloth.
3
CARRYING CASE - Check for dirt, moisture and mildew. Clean with a mild detergent and
water. Dry with a lint-free cloth.
4
BATTERIES - Remove batteries. Check for corrosion on terminals and dirt or moisture in
the battery cap. Clean battery cap with a dry cloth. Replace the batteries if corroded.
5
LENSES - Check for dirt and moisture. Clean with lens paper or a brush and/ or alcohol and
cotton swabs.
6
EYECUPS - Check for dirt, dust, cracked or torn cups. Inspect for bent, broken or improp-
erly tting eyecups.
7
INTERPUPILLARY ADJUSTMENT - Slide each eyepiece back and forth to check for binding
or looseness.
8
OBJECTIVE LENS FOCUS KNOB - Rotate objective lens focus knob to ensure free move-
ment (range is approximately 1/3 turn).
9
NECK CORD & LENS CAP- Check for cracked, torn or missing lens cap. Inspect cord for cuts,
damage or frayed ends. Re-tie ends if necessary.
10
LATCH - Inspect for damage.
11
RESET/ OFF-ON-IR/ PULL SWITCH - Remove any batteries and turn the switch from RESET/
OFF to ON or IR/ PULL. Each position should have a denite stopping point. Inspect for
broken or missing knob.
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