ARMY TM 9-6115-639-13
AIR FORCE TO 35C2-3-386-51
MARINE CORPS TM 10155A-13/1
Table 4-4. Unit Level Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
14. AUXILIARY FUEL SYSTEM WILL NOT ENERGIZE WHEN GENERATOR FUEL TANK IS
LOW ON FUEL
a. Check AUX FUEL switch S17 as follows:
(1)
Connect positive (+) probe of multimeter to terminal board TB5, pin 1.
(2)
Connect negative (-) probe to terminal board TB3, test point TP31.
(3)
Place START / RUN / STOP switch in RUN position.
(4)
Place AUX FUEL switch in the ON position.
(5)
20 to 32 VDC present?
If not present, remove and replace AUX FUEL switch (Para. 4-19).
b. Check diode CR3 as follows:
(1)
Connect positive (+) probe of multimeter to terminal board TB5, pin 1.
(2)
Connect negative (-) probe to terminal board TB3, test point TP31.
(3)
Place START / RUN / STOP switch in RUN position.
(4)
Place AUX FUEL switch in the ON position.
(5)
20 to 32 VDC present?
If not present, remove and replace diode (Para. 4-25).
c. Check fuel level switch FL2 as follows:
(1)
Connect positive (+) probe of multimeter to TB 5-3.
(2)
Connect negative (-) probe to terminal board TB3, test point TP31.
(3)
Place START / RUN / STOP switch in RUN position.
(4)
Place AUX FUEL switch in the ON position.
(5)
20 to 32 VDC present?
If not present, remove and replace fuel level switch (Para. 4-39).
d. Check auxiliary fuel transfer relay K14 as follows:
(1)
Connect positive (+) probe of multimeter to fuel transfer relay K14-9.
(2)
Connect negative (-) probe to terminal board TB3, test point TP31.
(3)
Place START / RUN / STOP switch in RUN position.
(4)
Place AUX FUEL switch in the ON position.
(5)
20 to 32 VDC present?
If not present, emove and replace relay (Para. 4-24).
e. Defective auxiliary fuel pump E1.
Remove and replace auxiliary fuel pump (Para. 4-51).
4-22
Change 1
