T O 35C2-3-442-2
P-8-627-34
TM 5-6115-457-34
TM-07464A-35
b . Removal. Refer to figure 6-22 and
4. Place the battle short switch S7
tag, then disconnect wiring to the DC relay
to the ON position and measure the voltage
terminal board. Remove the four nuts se-
across terminal A5-21 and terminal A5-15.
curing the relay in position.
The voltage should read 20-32 VDC. When
the start-run-stop switch S2 is placed in
the run position. Also measure voltage
6-88. TEST.
across terminal A5-23 to terminal A5-15.
a . Connect the DC relay assembly to
The voltage should read 20-32 VDC. If
test equipment as illustrated in figure 6-23
voltage is measured at A5-21 but not at
and perform test specified in procedural
A5-23, disconnect wire from A5-21 and
analysis table 6-9.
check for continuity between terminal A5-21
and terminal A5-23 with A5-21 positive. If
NOTE
there is no continuity, replace diode CR6.
assembly schematic. Refer to this
5. Measure the voltage across ter-
s thematic when checking individual
minal A5-12 to terminal A5-15. The voltage
components for required values.
should read 20-32 VDC when the start-run-
stop switch S2 is placed in the START posi-
b. Remove the DC relay from the test
tion. Also measure voltage across terminal
equipment.
A5-9 to terminal A5- 15. The voltage should
read 20-32 VDC. If voltage is measured at
6-89. DISASSEMBLY. Refer to figure
terminal A5-12 and not at terminal A5-9,
6-24 and disassemble the DC relay assem-
ble to the extent necessary to accomplish
disconnect wire from terminal A5-12 and
r e p a i r . Pay particular attention to the
check for continuity across terminals A5- 12
following:
to terminal A5-9 with A5-12 positive. If
there is no continuity, replace diode CR3.
6. Disconnect connector P33 from
WARNING
the float switch located in the day tank and
install a jumper between pins C and D of
Avoid breathing fumes generated by
P33 to simulate a low fuel fault condition.
unsoldering /soldering Eye pro-
tection is required.
Place the battle short switch S7 in the on
position. Place the start-run-stop switch
S2 in the RUN position and measure the
voltage from terminal A5-6 to terminal
a. Exercise care not to apply excessive
A5-15. The voltage should read 20-32 VDC.
heat when unsoldering components.
Disconnect the wire from terminal A5-17
b. Remove relay socket (10) by remov-
and check continuity across terminal A5-5
ing nut (7), lock washer (8) and washer (9),
to terminal A5-17 with voltage applied to
spacer (11) will fall free.
terminal A5-6. If voltage is measured at
terminal A5-6 and there is no continuity
6-90. CLEANING. Clean all components
from terminal A5-5 to terminal A5-17, re-
with a clean lint-free cloth moistened with
place relay A5K8. Remove jumper from
an approved cleaning solvent and dry
pins C and D of P33.
thoroughly.
Change 8
6-61
