TM 5-3610-253-14
Remove two screws and bracket which secure glass rule to rear mounting
a.
pedestal.
b. Remove two screws and bracket which secure glass rule to pivot bracket.
c.
Slightly lift rule from mounting pedestal and carefully pull it toward
rear, sliding it out of OMI.
NOTE
When storing glass rule, be sure it is carefully packed in storage box.
d. Carrefully insert new glass rule in slot at rear of OMI and slide
forward.
e.
Insert forward end of glass rule in pivoted bracket and set rear of rule
in mounting pedestal.
Tighten screws on
f. Install holddown bracket and secure with two screws.
pivot bracket.
Turn on power.
g.
(1) Unlock safety lock with operator key.
(2) Turn main power switch to I position.
(3) Press control power on switch.
h. Move backgauge to its most forward position. Using pencil, place a
vertical mark on OMI screen at edge of a graduation mark projected on
screen.
Move backgauge to its most rearward position. If pencil mark is no
i.
longer at same position in relation to projected graduation marks, glass
rule must be adjusted.
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