Fuel Pump

TM 10-3930-632-12

Figure 4-30. Fuel Filter, Fuel Pump, Lines and Fittings, Removal and Installation

with the gage held 16 inches above the fuel pump,

(2)

Remove the carburetor as shown in

inspect the fuel lines and the filter for obstructions. If

c. Installation. Using a new gasket, install the

the filter and lines are unobstructed, replace the fuel

pump.

carburetor by reversing the removal procedure given in

(4) Remove the tee fitting and tachometer.

figure 4-29. Tighten carburetor mounting nuts to 15 to

Connect the fuel line to the elbow.

20 foot-pounds.

Adjust carburetor as directed in

b. Removal. Remove the fuel pump and gasket

subparagraph a. above.

c. Installation. Install the fuel pump using a

4-43. Fuel Pump

a. Testing.

new gasket as shown in figure 4-30. Torque nuts to 15

to 20 foot-pounds.

(1) Disconnect the fuel hose (fig. 4-30)

from the elbow on the carburetor. Install a tee fitting

4-44. Fuel Filter

between the elbow and the fuel line. Connect a 0 to 5

a. Servicing.

PSI pressure gage to the tee fitting.

(1) Close the three-way valve (fig. 4-30).

(2) Connect a tachometer to the engine.

(2) Service fuel filter as illustrated in figure

(3) Operate the engine at 1800 RPM. If

4-31.

the gage does not indicate between 1 and 2 PSI

4-44