TM 5-6675-322-14
Table 4-1.
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES - Cont
ITEM
NO.
B - Before
W - Weekly
AN - Annually
(Number) . Hundreds of Hours
D - During
M - Monthly
S
- Semiannually
A - After
Q - Quarterly
BI - Biennially
1
2
IN-
TER-
VAL
B
B
ITEM TO BE INSPECTED
PROCEDURE
STEREOMETER PARALLAX BAR - Cont
Inspect Parallax Bar - Cont
4.
I n s p e c t o p t i c a l d o t s f o r c h i p s , f i n g e r p r i n t s , or
c r a c k s.
5.
Unlock micrometer barrel by releasing lock.
Rotate knurled knob and observe free movement
o f m o u n t f o r r i g h t o p t i c a l d o t a g a i n s t s p r i ng
t e n s i o n .
Clean Parallax Bar.
1.
2.
3.
4.
Moisten clean lens tissue with lens cleaner.
Wipe optical dot surfaces with moistened
t i s s u e u s i n g c i r c u l a r m o t i o n , s t a r t i n g f r om
center and moving toward edge.
Wipe optical dot glass surfaces with fresh, dry
t i s s u e u s i n g a c i r c u l a r m o t i o n , s t a r t i n g f r om
center and moving toward edge.
Wipe exposed metal surfaces with clean tissue to
remove dust or dirt .
For Readiness
Reporting,
Equipment Is
Not Ready/
Available If:
4-6
