ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
2-90 LOW FUEL LEVEL AUXILIARY FUEL PUMP FLOAT SWITCH.
2-90.1
a.
b.
c.
d.
2-90.2
a.
b.
c.
d.
e.
2-90.3
a.
b.
c.
d.
e.
f.
g.
h.
i.
j-
2-90.4
a.
b.
c.
d.
e.
f.
Inspection.
Shut down generator set.
Open right side engine access doors.
Inspect low fuel level/auxiliary fuel pump float switch (40, FIGURE 2-26) for loose connections and mounting,
and other damage.
Close engine access doors.
Removal.
Shut down generator set.
Open battery access door and disconnect negative battery cable.
Open right side engine access doors, tag and disconnect low fuel level/auxiliary fuel pump float switch (40,
FIGURE 2-26) electrical connector.
Remove screws (37), Iockwashers (36), flatwashers (39), float switch (40), and gasket (41) from fuel tank.
Cover opening in fuel tank.
Testing.
Shut down generator set.
Remove low fuel level/auxiliary fuel pump float switch, paragraph 2-90.2.
Position float switch in vertical position, similar to position as installed in fuel tank.
Set multimeter for ohms and connect positive lead to pin 2 for top float and negative lead to pin 1 for top float
of float switch electrical connector.
With upper or lower float moving toward the down position the multimeter should indicate continuity 1/4 inch
before float reaches the down position.
Move upper float to the full up position, multimeter should indicate open circuit.
Disconnect muitimeter leads from pins 1 and 2 and connect positive lead to pin 3 and negative lead to pin 4
of electrical connector.
Repeat steps e and f, except with lower float.
Replace low fuel level/auxiliary fuel pump float switch if indications are other than above.
Install low fuel level/auxiliary fuel pump float switch, paragraph 2-90.4.
Loosen float swithch plate ajusting nut.
Remove cover in fuel tank opening.
Throughly dean mating surfaces for a new gasket (41, FIGURE 2-26). Ensure no foriegn material enter fuel
tank Apply sealant (item 21, Appendix C) to both sides of gasket (41).
Position gasket (41) and float switch (40) in fuel tank.
Connect electrical connector, remove tag, and dose right side engine access doors.
Connect negative battery cable. Close battery access door.
Change 1
2-125
