3-22. EYEPIECE AND ERECTOR LENS SUBASSEMBLY MAINTENANCE INSTRUCTIONS
- continued
c. Assembly
NOTE
If fixed ratchet is to be replaced, perform steps
1 thru 5. If existing parts are reinstalled, pro-
ceed to step 6.
1
Apply grease (item 7, appx B) to new preformed
packing (30) and install in groove of seal (18).
2
Install section of seal (18) with preformed packing
(30) installed, spacer (29), and fixed ratchet (26) on
rear housing (14).
3
Position fixed ratchet (26) with area to be drilled in
a different location from original pin holes in rear
housing (14). Secure fixed ratchet (26) with six new
Iockwashers (28) and six cap screws (27).
4
Drill holes for two headless straight pins (31 ), using
a No. 15 (0.180) drill; drill into rear housing (14) 3/8
inch (9.53 mm) deep. Ream for drive fit in the rear
housing (14) and fixed ratchet (26).
5
Drive two headless straight pins (31) into holes
drilled in step 4 above.
NOTE
Follow steps 6 thru 10 if reinstaIling existing
parts.
6
Apply grease (item 7, appx B) to new preformed
packing (30) and install in groove of seal (18).
7
Install section of seal (18) with preformed packing
(30) installed, spacer (29), and fixed ratchet (26) on
rear housing (14).
If removed, aline headless straight pins (31) with
8
pin holes in rear housing (14) and secure with six
new Iockwashers (28) and six cap screws (27).
9
Apply grease (item 7, appx B) to new preformed
packing (25) and install in groove of rear housing
(14) opposite the side where fixed ratchet (26) has
been installed.
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