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TM 5-4320-308-13
4-13. REPAIR LIFT PUMP (Continued)
REPAIR:
WARNING
Death or serious injury could occur if fuel is not handled carefully. Use in a well-ventilated area
away from open flame, arcing equipment, ignition sources, heaters, or excessive heat. Always
store fuel in proper, marked containers. DO NOT SMOKE.
Death or serious injury could occur if compressed air is directed against the skin. Do not use
compressed air for cleaning or drying unless the pressure is/has been reduced to 30 psi (2.06 bar)
or less. When working with compressed air always use chip guards, eye protection, and other
personal protective equipment
1
Clean all parts except gasket (4) with clean diesel fuel and dry with low-pressure compressed air.
2
Inspect mating surface of cover (3) and pump body (9) parts for roughness or other damage. Scratches or other
damage may result in pressure leaks.
3
Check for wear at contact areas. Replace pump body (9) or cover (3) if worn.
4
Inspect all parts for score marks and burrs. Parts must fit together tightly.
5
If parts are not repairable, replace.
ASSEMBLY:
CAUTION
Do not scratch or mar mating surfaces of pump body or cover. The pump may leak or otherwise
malfunction after reassembly.
1
Install new diaphragm (8) into pump body (9).
2
Install upper pump chamber (7) on diaphragm (8).
3
Install six Allen screws (6) finger tight. Move fuel primer lever on pump body (9) to compress diaphragm spring.
Tighten Allen screws.
4
Install fuel filter (5).
5
Lubricate gasket (4) with lubricating oil and install.
6
Install screw (1), gasket (2), and cover (3).
4-23
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