ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Section IV. MAINTENANCE OF PADS
(8) Remove cover.
3-10. General. Direct support
maintenance of
PADS
includes replacement of the IMU, CDU, computer,
Loosen memory unit wedgelock screws.
(9)
computer power supply, and power supply, and repairs
to those units as well as the mounting base subassem-
Remove memory unit.
(lo)
bly, battery box, installation kit, transit case, and
winterization kit.
(11)
Inspect transit case shock and vibration isola-
tor mounts. Replace if frayed, broken, or
a. Torquing is required to ensure proper sealing of
loose.
the computer, CDU and power supply, and mounting of
the IMU. General torquing procedures are given in
b. Replacement.
(1) Insert memory unit in compartment and
tighten wedgelock screws.
(2) Secure cover to memory unit compartment.
(1) Place desired driver on torque wrench.
(3) Install IMU in transit case and torque IMU
retaining bolts to 50 inch-pounds.
(2) Set dial so main power is on zero.
(4) Carefully place cover on transit case and se-
(3) Set follow-up pointer to zero.
cure with latches.
(4) Tighten fastener, with an uninterrupted rotary
motion, to the desired torque value. The fol-
3-13. Unit Replacement. This paragraph describes pro-
low-up pointer will indicate the maximum
cedures for the removal and replacement of the CDU.
torque applied, Make sure the driver is per-
computer, computer power supply, IMU, and power
pendicular to the fastener head at all times.
supply. Figure 3-1 shows PADS interconnections and
figure 3-6 is an
exploded view of
the primary pallet.
b. Torquing Sequence. To provide consistent seal-
ing, fasteners must be torqued in a specified pattern
with progressively increasing torque values. First, all
as follows:
fasteners are torqued to 1/3 the specified maximum
(1) Removal.
value. Next, all fasteners are torqued 2/3 the specified
value, Finally, the fasteners are torqued to the specified
value. The torque patterns for the various units are
3-12. Removal and
Replacement of IMU in
Transit
Case. This paragraph describes the removal and re-
placement of the IMU in the transit case. Figure 3-5
shows the IMU installed in the transit case.
a. Removal.
(1) Release latches securing cover to transit base.
(2) Press pressure relief valve until air pressure is
equalized.
(3) Lift off transit case cover.
(4) Check humidity indicator. Take the action
shown on the indicator.
(5) Loosen IMU retaining bolts.
(6) Remove IMU.
(7) Loosen memory unit compartment cover
screws.
Change 6