ARMY TM 5-6675-306-34
MARINE CORPS TM 08837A-34/2
(b) Tighten (turn clockwise) detent screw (10) until
it is just snug. Do not overtighten.
(1) Removal. Remove four screws (18), four
(c) Loosen the detent screw 1/8 turn.
lockwashers (19), and four washers (20) securing retainer
NOTE
(21); remove retainer.
(2) Replacement.
If detent screw (10) does not stay in
adjustment, replace the detent screw and
(a) Place retainer (21) in position on mounting base
adjust as above. (The plastic locking device
frame (l).
on the detent screw prevents vibration from
(b) Install four screws (18), lockwashers (19), and
turning the screw.)
washers (20) securing retainer to mounting base
(3) Plumb bob arm replacement. See figure 3-13 and
frame.
replace plumb bob arm (1) as follows:
Plumb Bob Assembly. Remove and replace plumb
d.
(a) Removal.
bob assembly (33, figure 312, sheet 2) as follows:
1. Extend plumb bob arm (1)
(1) Removal. Remove four screws (35) and four
washers (34) securing plumb bob assembly (33) to mounting
2. Remove nut (9).
plate (5). Remove plumb bob assembly.
3. Remove shoulder screw (2) securing plumb
(2) Replacement.
bob arm (1) to the extension arms (3 and 8); remove plum
bob arm.
(a) Place plumb bob assembly (33) on mounting
plate (5).
(b) Replacement.
(b) Install four screws (35) and four washers (34)
primer
1. Apply
sealing
compound
securing plumb bob assembly to mounting plate
(MIL-S-22A73) to nut (9) threads; allow to dry.
(5).
2. Apply sealing compound (MIL-S-22473,
Plumb Bob Assembly Maintenance.
e.
Grade C) to nut (9) threads.
(1) Pivot block detent screw adjustment
3. Insert plumb bob arm (1) between the
extension arms (3 and 8) and secure with shoulder screw
detent screw (6) adjustment/replacement as follows:
(2).
(a) Hold extension arms (3 and 8) in the stowed
4. Install nut (9) and tighten to secure shoulder
(vertical) position. If arm will not move to the
screw (2).
vertical position, loosen (turn counterclockwise)
the detent screw (6).
(b) Tighten (turn clockwise) detent screw (6) until it
locking extension arm (8) as follows:
is just snug. Do not overtighten.
(a) Removal.
(c) Loosen the detect screw (6) 1/8 turn.
1. Remove plumb bob arm (1) in accordance with
NOTE
paragraph 3-20e(3)(a).
2. Remove shoulder screw (4 or 7) securing
If detent screw (6) does not stay in
plumb bob extension arm (3) or plumb bob locking
adjustment, replace the detent screw and
extension arm (8) to pivot block (5); remove arm.
adjust as above. (The plastic locking device
on the detent screw prevents vibration from
(b) Replacement
turning the screw.)
1. Secure plumb bob extension arm (3) or plumb
(2) Plumb bob locking extension arm detent screw
bob locking extension arm (8) to pivot block (5) with
shoulder screw (4 or 7). Apply sealing compound
plumb bob locking extension arm (8) detent screw (10)
(MIL-S-22473, Grade C) to screw threads.
adjustment/replacement as follows:
2. Replace plumb bob arm (1) in accordance with
(a) Hold plumb bob extension arm (3) in the
paragraph 3-20e(3)(b).
operational position. If arm will not move to that
3.21. Battery Box Maintenance. Maintenance of the battery
position, turn (counterclockwise) the detent
box consists of replacing damaged riveted hardware.
screw (10).
Change 7
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