Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Figure 3-5. IMU Installed in Transit Case (Sheet 2 of 2)
c. IMU. Remove and replace IMU (9, figure 3-6) as
follows:
IMU mounting bolt heads are secured to
the bolts by shear pins to prevent over-
tightening. Use torque wrench to torque
the bolts to prevent breakage. If a cap is
broken off, unscrew the bolt with a
flat-
tip screw driver.
NOTE
3. Disconnect cable assembly M5 connector
W5P1 from IMU connector 2J4.
4. Disconnect cable assembly W5 connector
W5P3 from IMU connector 2J5.
(b) Swing plum bob arm (7, figure 3-6) out to
provide clearance.
(c) Loosen two bolt assemblies (10) securing
IMU (9) to IMU mounts (8) and pull IMU
(9) back to disengage guide pin (11) from
computer mounting base (12).
(cl) Lift IMU (9) out through side of mounting
base frame (13) opposite the plumb bob arm
(7)
Memory unit Al (7 or 7.1. figure 3-7) and
■
IMU (9, figure 3-6) are supplied as a
matched set in the IMU transit case (fig-
(2) Replacement.
ure 3-5). When IMU is replaced, match-
(a)
ing memory unit Al must be installed in
computer.
(h)
(1) Removal.
(a) See figure 3-1 and disconnect cables from
(c)
IMU as follows:
1. Disconnect cable assembly W2 connector
W2P1 from IMU connector 2J1.
(d)
2. Disconnect cable assembly W4 connector
(e)
W4P1 from I MU connector 2J3.
Install IMU (9) through side of mounting
base frame (13).
Engage guide pin (11) in hole provided in
computer mounting base (12).
Engage and torque to 25 inch-pounds two
bolt assemblies (10) securing IMU (9) to
IMU mounts (8).
Check IMU foot contact.
Increase torque to 50 inch-pounds for the
two bolt assemblies (10).
Change 1
3-25