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Figure 4-9. Fuel system components, exploded view.
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TM-5-4320-234-12 Pump Centrifugal Self-Priming Gasoline Engine Driven Wheel Mounted 6-Inch 1500 GPM Capacity At 60 Foot Head Manual
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Carburetor - TM-5-4320-234-120051
TM 5-4320-234-12
c.
Cleaning and Inspection.
(2) Inspect the fuel tank for cracks, distortion,
dents, damaged threads, and other damage. Replace a
(1) Inspect the fuel strainer parts for cracks
damaged fuel tank.
and damage. Replace defective parts.
WARNING
WARNING
No repairs of the fuel tank are authorized.
Clean all parts in a well-ventilated area.
Replace if defective. Any repairs involving
Avoid inhalation of solvent fumes and
heat or flame can result in a severe
prolonged exposure of skin to cleaning
explosion due to the gasoline fumes within
solvent.  Wash exposed skin thoroughly.
the tank.
Dry cleaning solvent (fed.  spec.  P-D-680)
c.
Installation.
used to clean parts is potentially dangerous
to personnel and property. Do not use near
(1) Installation is the reverse of removal. Refer
open flame or excessive heat. Flash point of
solvent is 100 to 138F (38 to 59C).
(2) Fill the fuel tank with fuel and start the
engine. Check carefully for leaks noted.
(2) Clean all fuel lines and fittings with dry
cleaning solvent (fed. spec. P-D-680). Blow through
4-23. Fuel Pump (Fig. 4-9)
them with compressed air to ensure all are clear.
a. Removal.
(3) Inspect the hoses for cracks, fraying, and
(1) Remove the fuel lines and fuel strainer from
damaged threads; replace damaged hoses.
the fuel pump (para 4-21 b).
(4) Inspect the 3-way fuel selector valve for
(2) Remove the two cap screws (11) and lock
difficult operation and for cracked or damaged threads;
washers (12) that secure the fuel pump (13) to the
replace a damaged valve.
cylinder block.  Pull straight out on the fuel pump to
(5) Inspect all other parts for cracks,
remove it. Remove the gasket (14).
distortion, and damaged threads; replace damaged
b.
Cleaning and Inspection.
parts.
WARNING
d. Reassembly and Installation. Reassemble and
Clean all parts in a well-ventilated area.
install the fuel lines and fittings as shown in items 1
Avoid inhalation of solvent fumes and
through 10 of figure 4-8 and items 1 through 10 of figure
prolonged exposure of skin to cleaning
4-9. After assembly, check for leaks. Correct any leaks
solvent.  Wash exposed skin thoroughly.
noted.
Dry cleaning solvent (fed.  spec.  P-D-680)
4-22. Fuel Tank (Fig. 4-8)
used to clean parts is potentially dangerous
a. Removal.
to personnel and property. Do not use near
(1) Drain the fuel tank.  Disconnect the fuel
open flame or excessive heat. Flash point of
lines, fittings, and fuel selector valve from the fuel tank.
solvent is 100 I to 138 OF (38 to 59 C).
(2) Remove the fuel level gage (13) and the
(1) Clean the fuel pump with a cloth dampened
suction tube (14) from the fuel tank (18).
with a dry cleaning solvent (fed. spec. P-D680) and
(3) Block up under the fuel tank and remove
wipe dry.
the four cap screws (15), nuts (16), and lock washers
(2) Inspect the fuel pump for cracks, damaged
(17) that secure the fuel tank to the frame; lower the fuel
threads, and other obvious damage. Operate the cam
tank to the ground.
follower lever of the fuel pump to check for faulty
b. Cleaning and Inspection.
movement. Replace the fuel pump if defective.
(3) Make sure that you completely remove the
WARNING
old gasket from the cylinder block.  Use a gasket
Clean all parts in a well-ventilated area.
scraper or knife to remove all traces of the old gasket.
Avoid inhalation of solvent fumes and
prolonged exposure of skin to cleaning
c.
Installation.
solvent.  Wash exposed skin thoroughly.
(1) Use the crank or starting motor to turn over
Dry cleaning solvent (fed.  spec.  P-D-680)
the engine so that the cam follower engages the low
used to clean parts is potentially dangerous
portion of the cam. This will facilitate installation of the
to personnel and property. Do not use near
fuel pump. Position the fuel pump (13, fig. 4-9) and
open flame or excessive heat. Flash point of
gasket (14) on the engine and secure it with two cap
solvent is 100 to 138F (38to 59C).
screws (11) and lock washers (12).
(2) Install the fuel strainer, lines, and fittings
(1) Flush the interior of the fuel tank
with dry cleaning solvent (fed. spec. P-D-680);
drain completely.
4-20

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