TM 5-5420-280-23&P
0101 00
ENGINE FUEL PUMP REPLACEMENT (Contd)
REMOVAL
WARNING
Fuel is very flammable and can explode easily. To avoid serious
injury or death, keep fuel away from open fire and keep fire
extinguisher within easy reach when working with fuel. Do not
work on fuel system when engine is hot. Fuel can be ignited by hot
engine. When working with fuel, post signs that read NO
SMOKING WITHIN 50 FEET OF PALLET.
1.
Shut off fuel supply to fuel pump (7) by closing fuel supply valve if so equipped, clamping fuel hose (11),
or remove screw (19) and seal washer (18) and drain fuel tank. Discard seal washer (18).
2.
Remove screw (17), seal washer (16), fuel supply hose fitting (15), and seal washer (14) from fuel
pump (7). Discard seal washers (16) and (14).
3.
Remove screw (3), seal washer (4), fuel discharge hose fitting (5) on hose (2), and seal washer (6)
from fuel pump (7). Discard seal washers (4) and (6).
4.
Bend two locking tabs (8) away from nuts (10) and remove two nuts (10), washers (9), locking
tabs (8), fuel pump (7), gasket (13), and fuel pump push rod (12) from studs (20) and engine (1).
Discard locking tabs (8) and gasket (13).
5.
If necessary, clean old gasket material from engine (1) and around studs (20).
INSTALLATION
NOTE
Apply a light coat of grease to seal washers and fuel pump push rod
at installation.
1.
Install fuel pump push rod (12), new gasket (13), and fuel pump (7) on two studs (20) of engine (1)
with new locking tabs (8), washers (9), and nuts (10). After tightening nuts (10), bend one tab up
and other tab down on locking tabs (8).
2.
Install new seal washer (6), fuel discharge hose fitting (5) on hose (2), new seal washer (4), and
screw (3) on fuel pump (7).
3.
Install new seal washer (14), fuel supply hose fitting (15), new seal washer (16), and screw (17) on
fuel pump (7).
4.
Install new seal washer (18) and screw (19) on end of screw (17) if removed or open fuel supply hose (11)
to fuel pump (7).
CAUTION
Never use starting fluid (ether) to assist starting LPU. Failure to
comply will result in damage to engine.
5.
If necessary, operate fuel priming pump. Refer to TM 5-5420-280-10.
6.
Run engine briefly to check for leaks. Refer to TM 5-5420-280-10.
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