TM 55-1520-240-T
8-14.3 MAINTENANCE PANEL POWER DISTRIBUTION OPERATIONAL CHECK (Continued)
8-14.3
TASK
RESULT
1.
2.
2.1
2.2
3.
4.
5.
6.
7.
8.
Check that HYDRAULICS MAINT PNL cir-
cuit breaker (1) is closed.
Check that HYDRAULICS MAINT PNL LTS
circuit breaker (2) is closed.
With q , check that AFCS NO. 1 circuit
breaker (14) is closed.
With q , check that AFCS NO. 2 circuit
breaker (15) is closed.
Remove maintenance panel light (3) from
bracket. Press and release switch (4). Turn
control (5) through its range.
Set GND switch (6) to TEST.
Set GND switch (6) to RESET, then to
GND.
Press and release FILTER CHANGE PRESS
light (8) and PUMP CHANGE NO. 1 light
(9).
Check that all six transmission main oil PRESS
lights (10) and three transmission AUX OIL
PRESS lights (11) are lit.
With q , check that left and right
GROUND CONTACT lights (12 and 13) are
lit.
If MAINT PNL circuit breaker (1) is open, close it. If it
opens again, go to task 8-14.4.
if MAINT PNL LTS circuit breaker (2) is open, close
it. If it opens again, go to task 8-14.5 (without q ).
With q , go to task 8-14.10.
If AFCS NO. 1 circuit breaker (14) is open, close it. If
it opens again, go to task 11-3.6.
If AFCS NO. 2 circuit breaker (15) is open, close it. If
it opens again, go to task 11-3.11.
Light (3) shall blink when switch (4) pressed and re-
leased. Light shall become brighter as dimming con-
trol (5) is turned. If light does not come on, go to
task 8-14.6. If light comes on but does not become
brighter, replace light.
All 19 indicators (7) shall change from all black to
black-and-white fan displays. If one or more indica-
tors has not changed display, go to task 8-14.7.
All 19 indicators (7) shall change from black-and-
white fan displays to ail-black displays. If one or
more indicators has not changed display, go to task
8-14.8.
All lights (8 and 9) shall momentarily come on. If all
lights do not come on, go to task 8-14.9.
If any light is not lit, replace lamp. If light still is not
on, go to task 8-9.3.
If left GROUND CONTACT light (12) is not lit, go to
task 3-1.5.
If right GROUND CONTACT light (13) is not lit, go to
task 3-1.7.
NOTE
Remainder of operations are checked
with each individual system check.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23
Battery disconnected.
Electrical power off.
END OF TASK
8 - 3 2 3