TM 5-6675-323-14
k. Support optical mount while removing screws.
CAUTION
Be careful not to drop bearings when lifting gear housing assembly.
l.
Lift optical ring assembly and gear housing assembly clear. Set on
work surface.
m.
Disengage chain from sprocket.
NOTE
Do not lose any shims on sprocket shaft.
n.
Lift worm gear and attaching parts from split-stage light table, and set
on work surface.
o.
Remove bearing caps and lift worm free.
Spray worm gears with bearing cleaner. Wipe up excess cleaner.
p.
Reinstall worm on worm gear and reinstall bearing cap.
q.
Reinstall worm gear assembly.
Be sure all shims are on sprocket shaft.
r.
R e e n g a g e chain and sprocket.
s.
Reinstall optical mount gear housing. Secure with screws.
t.
Test motion by moving Z-axis coarse feed knob.
u.
v.
Recollimate optical mount (paragraph 6-20.12).
w.
Plug in power cord.
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