TM 9-2350-256-20-1
0022 00
CORRECTIVE ACTION Continued
5. Place manual fuel shutoff handle in ON (in) position. Remove cotter pin. Place engine fuel shutoff
lever in ON (up) position. Check connector link for a free pin fit. If a free pin fit cannot be made, make
adjustments in accordance with WP 0124 00.
6.
Turn MASTER switch and in-tank fuel pump switch ON. The electric fuel pump will make noise.
If there is no noise, troubleshoot fuel shutoff solenoid circuit (see WP 0045 00). If there is a noise,
perform the following fuel flow test. Disconnect fuel tank supply hose at engine primary fuel filter.
Remove quick disconnect. Place a 5-gallon (19-liter [L] ) container in a suitable position to collect
fuel from hose. Turn MASTER and in-tank fuel pump switches to ON position. Time fuel flow into
container. If there is no fuel flow or fuel flow is less than 3 gallons per minute (gpm) (11 liters per
minute [Lpm] ), inspect fuel lines for restrictions. If there are no restrictions, troubleshoot electric fuel
pump (see WP 0047 00).
7.
Disconnect fuel line connecting primary fuel filter and main fuel check valve at main fuel check valve
(check valve fuel inlet hose). Place fuel line in a suitable container. Place MASTER and fuel pump
switches in ON position. If there is no fuel flow, replace primary fuel filter element (see WP 0127 00).
NOTE
If the cause of filter restriction is excessive algae contamination, notify Direct Support Maintenance to
clean and drain fuel tanks and fill with uncontaminated fuel.
8.
Disconnect fuel line connecting mechanical fuel pump assembly and fuel/water separator at fuel/water
separator. Position a container to catch fuel. With MASTER and fuel pump switches in ON position,
crank engine. If there is no fuel flow from disconnected fuel line, replace mechanical (gear type) fuel
pump assembly (see WP 0118 00). If there is fuel flow, reconnect fuel line and go to step 9.
9.
Loosen air bleeder valve on top of fuel/water separator. With MASTER and fuel pump switches in ON
position, crank engine. If there is no fuel flow from air bleeder valve, replace outer fuel/water separator
elements (see WP 0128 00). If there is fuel flow, go to step 12.
10. Disconnect fuel line connecting fuel/water separator and engine at elbow on left front engine shroud.
Position suitable container to catch fuel from fuel line. With MASTER and fuel pump switches in ON
position, crank engine. If no fuel flows from line, replace final filter in fuel/water separator element
(see WP 0128 00). If engine fails to start, notify Direct Support Maintenance.
11. Check fire extinguisher engine shutoff switch for proper adjustment (see WP 0402 00 for removing
manual interlock systems). Verify that fire extinguisher engine shutoff activated light is lit.
12. Place transmission shift lever in neutral position. Open rear grille doors and position yourself by
exhaust pipe outlet. Have assistant place MASTER switch in on position and press manifold heater
switch. If electrical portion of manifold heater is working, a sparking sound will be heard at each
exhaust pipe outlet. If no sound is heard, troubleshoot engine starter circuit (see WP 0043 00).
13. Turn MASTER and fuel pump switches to ON position. Operate purge pump. If little or no resistance
is felt or excessive force is required during operation or purge pump cannot be operated, perform the
following procedures. Turn MASTER switch to OFF position. Remove fuel line connected to in port
on purge pump. Place fuel line in a suitable container and turn MASTER switch to on position. If no
fuel flows from line, perform fuel flow test (see step 6). If fuel flows into the container, place MASTER
switch in OFF position and connect fuel line. Disconnect fuel line from out side of purge pump. Place
a suitable container under purge pump. Place MASTER switch in on position and operate purge pump.
If fuel flows from out port, connect fuel line. If no fuel flows from purge pump or handle still will not
move, repair/replace purge pump (see WP 0122 00). Disconnect fuel filler inlet tube between main
fuel check valve and manifold fuel filter. Turn MASTER and fuel pump switches to ON position.
Press starter button and operate purge pump. If handle was excessively hard to operate or could not
be operated previously and can now be operated, replace main fuel check valve (see WP 0126 00).
Disconnect left intake manifold tube at tee on manifold heater fuel inlet solenoid valve. With MASTER
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