Fuel Tank

TM 5-4320-234-12

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

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)

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

to figure 4-8.

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

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

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

(para 4-21d).

with dry cleaning solvent (fed. spec. P-D-680);

drain completely.

4-20