Install guide
ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
(c) Remove capacitors C3 and C4 (5 and 6)
from thermostatic switch (4).
(2) Replacement.
Isopropyl alcohol is flammable and gives
off harmful vapors. Use only in well-ven-
tilated area away from open flames and
sparks. Avoid prolonged or repeated inha-
lation of vapors.
(a)
(b)
(c)
(d)
(f)
Clean mountin surfaces of capacitors C3
and C4 (5 and 6) and thermostatic switch (4)
using isopropyl alcohol and lint-free mate-
rial.
Apply adhesive (MIL-A-46146, Type 1) to
mounting surfaces of capacitors C3 and C4
(5 and 6) and thermostatic switch (4). Mount
capacitors. C3 and C4 (5 and 6) on thermo-
static switch (4).
Cure adhesive for 72 hours minimum.
Install gasket (7).
Prepare and solder wires connecting ther-
mostatic switch (4) and capacitors C3 and
C4 (5 and 6) using standard shop practices.
Clean solder joint; remove excess flux.
Install two screws (l), washers (2), and cover
plate (3) securing thermostatic switch (4) to
upper IMU subassembly (12).
d. IMU Cover Repair. Repair of the IMU cover
(22, figure 3-10) consists of replacing the clamping
catch(es) (9). Remove and replace the clamping
catch(es) as follows:
(1) Removal.
(a) Release
strike.
(b) Remove
clamping catch (9) from catch
two screws (8), washers (10), and
nuts (11 ) securing clamping catch (9) to
IMU cover (22). Remove clamping catch.
(2) Replacement.
(a) Secure clamping catch (9) to IMU cover
(22) with two screws (8), washers (10), and
nuts (11).
(b) Latch clamping catch (9) to catch strike.
e. Porro Prism Cover Repair. Repair of the porro
prism cover (15, figure 3-10) consists of replacing the
clamping catch(es) 18). Remove and replace the clamp-
ing
catch(es) as follows:
(1) Removal.
(a) Release two clamping catches (18) and re-
move porro prism cover (15) from IMU.
(b) Remove two screws (16) and washers (17)
securing clamping catch (18) to porro prism
cover (15). Remove clamping catch.
(2) Replacement.
(a) Secure clamping catch (18) to porro prism
cover (15) with two screws (16) and washers
(17).
(b) Fit porro prism cover to IMU and secure
with two clamping catches.
3-19. Installation Kit Maintenance. Maintenance of the
installation kit consists of repairing the sub-floor plate,
subfloor mounting bracket, and the control display unit
bracket.
a. Subfloor Plate. Repair of the subfloor plate con-
sists of replacing threaded inserts, repairing broken
welds on strap tiedowns and stud, and removing dents.
(1)
Threaded Insert.
Remove and replace threaded
inserts in accordance with figure 3-11.
(2) Strap tie-downs. Repair broken welds per
MIL-W-8611.
(3)
Stud.
Repair broken welds per MIL-W-8611.
b. Subfloor Mounting Bracket. Repair of the sub-
floor mounting bracket consists of replacing nut plates
and removing dents.
(1) Nut plate. Remove and replace nut plate as
follows:
(a) Removal. Remove rivets securing nut plate
by drilling or other suitable means. Remove
nut place.
(b) Replacement.
1. Secure nut plate in position with rivets.
2. Swage rivets in place.
3-20. Electrical Equipment Mounting Base Mainte-
nance.
Maintenance of the electrical equipment mount-
ing base consists of replacing upper and lower vibration
mounts, support strips, rear retainers, and plumb bob
assembly, and repair of the plumb bob assembly. Figure
3-12 is an exploded view of the electrical equipment
mounting base.
a.
Vibration Mounts. Remove and replace upper
and lower vibration mounts (7, or 26, figure 3-12, sheet
2) as follows:
(1) Removal.
(a) Remove stop (2, upper) or screw
(32,
lower),
and washer (3, upper or 31, lower) securing
spacer (6, upper or 29, lower) to mounting
3-37