ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
2-77 LOW FUEL LEVEL/AUXILIARY FUEL PUMP FLOAT SWITCH.
2-77.1
a.
b.
c.
d.
e.
f.
2-77.2
a.
b.
c.
d.
e.
f.
2-77.3
a.
b.
c.
d.
e.
f.
g
h.
i.
2-77.4
a.
b.
c.
d.
e.
f.
g.
h.
Inspection.
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Remove front housing panel, paragraph 2-18.1.
Inspect low fuel level/ auxiliary fuel pump float switch (9, FIGURE 2-21) for loose connections and mounting.
Install front housing panel, paragraph 2-18.4.
Connect negative battery cable and close access door.
Removal.
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Remove front housing panel, paragraph 2-18.1.
Tag and disconnect low fuel level/auxiliary fuel pump float switch (9, FIGURE 2-21) electrical connector.
Remove screws (6), Iockwashers (7), washers (8), float switch (9), and gasket (10) from fuel tank. Note posi-
tion of float switch when removing. Float switch must be in same position when installing to ensure clearance
with fuel tank.
Cover fuel tank opening.
Testing.
Remove low fuel level/auxiliary fuel pump float switch, paragraph 2-77.2.
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 and negative lead to pin 1 of electrical connector.
With upper float moving toward the down position, 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 multimeter leads from pins 1 and 2 and connect positive lead to pins 3 and negative lead to pin
4 of electrical connector.
Repeat steps d and e, 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 2-77.4,
Installation.
Lossen float switch plate adjusting nut.
Remove cover in fuel tank opening clean, make flat, and smooth mating surfaces to gasket (10,
FIGURE 2-21) ensuring for foriegn material enters fuel tank. Apply sealant (Item 20, Appendix C) to both
sides of gasket (10).
Position gasket (10) and low fuel level/auxiliary fuel pump float switch (9) to fuel tank. Ensure float switch (9)
is in same position as removed.
Install screws (6), Iockwashers (7), and washers (8).
Set float switch stem 1/16 inch from bottom of fuel tank . Tighten switch plate adjusting nut.
Connect electrical connector and remove tag.
Install front housing panel, paragraph 2-18.4.
Connect negative battery cable and close access door.
Change 1
2-105
