TM 9-6115-670-14&P
5-53
5.19. DC BOX SUBASSEMBLY.
This task covers: Replace
INITIAL SETUP
Tools
General Mechanic's Tool Kit
(Item 1, Appendix B)
Equipment Conditions
MASTER ON-OFF switch on APU control unit set
to OFF.
Materials/Parts
DC Box Subassembly
APU DC box wiring harness J3 removed (para
5.26.).
Relay board removed from APU (para 5.18.).
REPLACE
a. Remove six screws (JTACS and WIN-T), or seven screws (SICPS), flat and lock washers (3,
Figure 5-13) securing DC box (1) to generator housing (4).
b. Remove two bolts (7) (JTACS) and lock washes (6), or three bolts (SICPS and WIN-T), flat and
lock washers securing DC box (1) to generator (5) and remove DC box (1).
c. Remove six nuts with captive washers (2), six studs (8), vibration mounts (9), and washers (10)
from DC box (1).
d. Install six washers (10), vibration mounts (9), and studs (8) on DC box (1) and secure with six
nuts with captive washers (2).
e. Align holes and secure DC box (1) to generator (5) with two bolts (7) (JTACS) and lock
washers (6), or three bolts (SICPS and WIN-T), flat and lock washers.
f. Secure DC box (1) to generator housing (4) with six screws (JTACS and WIN-T), or seven
screws (SICPS), flat and lock washers (3).
