ARMY TM 9-6115-641-24
AIR FORCE TO 35C2-3-456-12
2-77-3. Testing.
a.
Remove low fuel level/auxiliary fuel pump float switch, paragraph 2-77-2.
b.
Position float switch in vertical position, similar to position as installed in fuel tank.
c.
Set multimeter for ohms and connect positive lead to pin 2 and negative lead to pin 1 of electrical connector.
d. With upper float moving toward the down position, multimeter should indicate continuity 1/4 inch before float
reaches the down position.
e.
Move upper float to the full up position, multimeter should indicate open circuit.
f.
Disconnect multimeter leads from pins 1 and 2 and connect positive lead to pin 3 and negative lead to pin 4
of electrical connector.
g.
Repeat steps d and e, except with lower float.
h.
Replace low fuel level/auxiliary fuel pump float switch if indications are other than above.
i.
Install low fuel level/auxiliary fuel pump float switch, paragraph 2-77-4.
2-77-4. Installation.
a.
Loosen float switch plate adjusting nut.
b.
Remove cover in fuel tank opening; clean, make flat, and smooth mating surfaces to gasket (10, Figure 2-21),
ensuring no foreign material enters fuel tank. Apply sealant (Item 19, Appendix C) to both sides of gasket (10).
c.
Position gasket (10) and low fuel level/auxiliary fuel pump float switch (9) onto fuel tank. Ensure float switch
(9) is in same position as removed.
d. Install screws (6), Iockwashers (7), and washers (8).
e.
Set float switch stem 1/16 inch from bottom of fuel tank. Tighten float switch plate adjusting nut.
f.
Connect electrical connector and remove tag.
g.
Install front housing panel, paragraph 2-18-4.
h. Connect negative battery cable and close access door.
2-78. FUEL PICKUP.
2-78-1. Removal.
a.
Shut down generator set.
b. Open left side engine access door and disconnect negative battery cable.
c.
Remove front housing panel, paragraph 2-18-1.
d.
Disconnect fuel line (17, Figure 2-21) from fitting (16) and cap line.
e.
Remove screws (11), Iockwashers (12), washers (13), fuel pickup (14), and gasket (15) from fuel tank. Cover
fuel tank opening.
f.
Remove fitting (16) from fuel pickup (14).
2-78-2. Inspection.
a.
Remove fuel pickup, paragraph 2-78-1.
b.
Inspect fuel pickup and fittings for clogs, stripped threads, and other damage.
c.
Replace damaged parts.
d.
Install fuel pickup, paragraph 2-78-3.
2-78-3. Installation.
a.
Remove cover in fuel tank opening; clean, make flat, and smooth mating surfaces to gasket (10, Figure 2-21),
ensuring no foreign material enters fuel tank. Apply sealant (Item 19, Appendix C) to both sides of gasket (10).
b. Install gasket (15) and fuel pickup (14) in fuel tank with screws (11), Iockwashers (12), and washers (13).
Change 1
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