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 TM 55-1905-223-24-3
Table 2-2. Troubleshooting-Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(5) Check the solenoid resistance with a volt-ohm meter.
(6) The solenoid resistance at 24 Vdc should be 28-32 Ohms.
(7) If resistance is not 28-32 Ohms replace solenoid.
STEP 2. Check for no fuel to injectors.
a. Loosen fuel line between fuel pump and cylinder head while cranking engine. Check for fuel.
b. Check fuel pump for fuel. Replace pump if required (para. 2-37).
STEP 3. Check if fuel connections on suction side of fuel pump are loose.
Tighten all fuel filter fittings and connections from fuel tank to fuel pump.
STEP 4. Check if fuel filter is plugged or suction line is restricted.
a. Replace fuel filter (para. 2-31).
b. Inspect for fuel hose restriction.
(1) Remove fuel supply hose to fuel pump and install a vacuum gauge between the pump and supply line.
(2) Hold gauge at the same level as the fuel inlet line.
(3) Run the engine and observe the reading.
(4) Maximum reading should be 4 in. Hg (10.2 cm Hg).
c. Remove gauge and connect supply line.
d. If restriction is above maximum, check fuel supply lines and clear.
STEP 5. Check for fuel in pump as follows:
NOTE
Loosen the fuel line at the shutoff valve while the engine is cranking. If fuel does
not come out of the connection, the pump must be primed.
If fuel pump is dirty, clean the outside of the pump.
a.
Remove the priming plug from the top of the housing.
b.
Fill the housing with clean fuel oil.
Tighten the plug to 20 ft-lb (30 N ) torque.
c.
m
d.
If the priming plug is hard to remove, remove the fuel supply hose to the gear pump.
e.
Fill the gear pump with clean engine lubricating oil.
f.
If fuel does not come out of the connection now, replace the pump (para. 2-37).
g.
Install the supply hose to the gear pump.
2-38
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