Install guide
ARMY TM 5-6675-306-34
MARINE CORPS TM 08837A-34/2
Retainer.
Remove and replace retainer (21, figure
3-12, sheet 1) as follows:
c.
(1) Removal. Remove four screws (18), four
lockwashers (19), and four washers (20) securing retainer
(21); remove retainer.
(2) Replacement.
(a) Place retainer (21) in position on mounting base
frame (l).
(b) Install four screws (18), lockwashers (19), and
washers (20) securing retainer to mounting base
frame.
d.
Plumb Bob Assembly.
Remove and replace plumb
bob assembly (
33, figure 3–12, sheet 2) as follows:
(1) Removal. Remove four screws (35) and four
washers (34) securing plumb bob assembly (33) to mounting
plate (5). Remove plumb bob assembly.
(2) Replacement.
(a) Place plumb bob assembly (33) on mounting
plate (5).
(b) Install four screws (35) and four washers (34)
securing plumb bob assembly to mounting plate
(5).
e.
Plumb Bob Assembly Maintenance.
(1) Pivot block detent screw adjustment
replacement.
See figure 3–13 and perform pivot block (5)
detent screw (6) adjustment/replacement as follows:
(a) Hold extension arms (3 and 8) in the stowed
(vertical) position. If arm will not move to the
vertical position, loosen (turn counterclockwise)
the detent screw (6).
(b) Tighten (turn clockwise) detent screw (6) until it
is just snug. Do not overtighten.
(c) Loosen the detect screw (6) 1/8 turn.
NOTE
If detent screw (6) does not stay in
adjustment, replace the detent screw and
adjust as above. (The plastic locking device
on the detent screw prevents vibration from
turning the screw.)
(2)
Plumb bob locking extension arm detent screw
adjustment/replacement.
See figure 3-13 and perform
plumb bob locking extension arm (8) detent screw (10)
adjustment/replacement as follows:
(a) Hold plumb bob extension arm (3) in the
operational position. If arm will not move to that
position, turn (counterclockwise) the detent
screw (10).
(b) Tighten (turn clockwise) detent screw (10) until
it is just snug. Do not overtighten.
(c) Loosen the detent screw 1/8 turn.
NOTE
If detent screw (10) does not stay in
adjustment, replace the detent screw and
adjust as above. (The plastic locking device
on the detent screw prevents vibration from
turning the screw.)
(3)
Plumb bob arm replacement.
See
figure 3-13 and
replace plumb bob arm (1) as follows:
(a) Removal.
1.
Extend plumb bob arm (1)
2.
Remove nut (9).
3.
Remove shoulder screw (2) securing plumb
bob arm (1) to the extension arms (3 and 8); remove plum
bob arm.
(b) Replacement.
1.
Apply sealing compound
primer
(MIL-S-22A73) to nut (9) threads; allow to dry.
2.
Apply sealing compound (MIL-S-22473,
Grade C) to nut (9) threads.
3.
Insert plumb bob arm (1) between the
extension arms (3 and 8) and secure with shoulder screw
(2).
4.
Install nut (9) and tighten to secure shoulder
screw (2).
(4)
Plumb bob extension arm replacement.
See
figure
3–13 and replace plumb bob extension arm (3) or plumb bob
locking extension arm (8) as follows:
(a) Removal.
1.
Remove plumb bob arm (1) in accordance with
paragraph 3-20e(3)(a).
2.
Remove shoulder screw (4 or 7) securing
plumb bob extension arm (3) or plumb bob locking
extension arm (8) to pivot block (5); remove arm.
(b) Replacement
1.
Secure plumb bob extension arm (3) or plumb
bob locking extension arm (8) to pivot block (5) with
shoulder screw (4 or 7). Apply sealing compound
(MIL-S-22473, Grade C) to screw threads.
2.
Replace plumb bob arm (1) in accordance with
paragraph 3-20e(3)(b).
3.21. Battery Box Maintenance.
Maintenance of the battery
box consists of replacing damaged riveted hardware.
3-42
Change 7