TM 1-1740-221-13&P&P
FIELD MAINTENANCE
FUEL PUMP (MECHANICAL)
INITIAL SETUP:
References
Tools and Special Tools
General Mechanic Tool Box (WP 0157, Item 24)
Torque Wrench, 0-10 ft-lb (WP 0157, Item 26)
Materials/Parts
Caps/Plugs, Protective (WP 0156, Item 7)
Equipment Condition
Personnel Required
Engine Shut Down
91B, Light Wheel Vehicle Mechanic (2)
INSPECTION
Visually inspect fuel pump and hose clamps for mount security, leaks or any damage affecting serviceability.
END OF TASK
TEST
WARNING
Test the fuel system in a well-ventilated and open place. Fuel vapors create ire and explosion
hazards, which will result in severe personal injury or death. Do not allow any open lame,
smoking materials, or other potential igniter near fuel or the fuel system. Always keep spilled
fuel and lubricants away from engine.
1.
Open engine cover (WP 0028).
2.
Remove electrical connector from the fuel solenoid (WP 0066).
3.
Place a drip pan under the fuel pump.
NOTE
This test is performed with the fuel system serviced, no loose connections and no fuel system
suction leaks.
4.
Loosen fuel pump input line clamp (Figure 1, Item 3).
5.
Remove fuel line (Figure 1, Item 4).
6.
Push primer button on fuel water separator (WP 0065) until fuel output is steady (no air).
7.
Connect fuel line (Figure 1, Item 4).
8.
Tighten fuel pump input line clamp (Figure 1, Item 3).
9.
Release tension and slide clamp (Figure 1, Item 1) up the fuel hose.
10.
Remove fuel pump output fuel line (Figure 1, Item 2).
11.
Crank engine (WP 0005) and observe that fuel is being discharged from the fuel pump.
12.
Replace fuel pump this work package if test fails.
13.
Install fuel pump output fuel line (Figure 1, Item 2).
14.
Release tension and slide clamp (Figure 1, Item 1) over the fuel hose.
15.
Test complete, perform shop cleanup.
00671
