SECTION V: TROUBLESHOOTlNG
TM 9-2350-256-20
C Check fire extinguisher engine shutoff switch for
proper adjustment (see paragraph 10-6). Ensure fire
extinguisher engine shutoff activated lamp is lit.
D Turn MASTER switch on. Turn FUEL SHUTOFF
switch ON. Listen for a click from engine. If no click
can be heard, troubleshoot fuel shutoff solenoid
circuit (see paragraph 2-19).
E 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 pm fit. If a free pm fit cannot be made,
make adjustments in accordance with paragraph 4-
11.
F
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 paragraph 2-19). 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 (gal) (19-liters [L] )
container in a suitable position to collect fuel from
hose. Turn MASTER and m-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
paragraph 2-19).
G
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 paragraph 4-
14).
NOTE
If the cause of filter restriction is excessive
algae contamination, notify Direct Support
Maintenance to clean and dram fuel tanks
and fill with uncontaminated fuel.
H 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 paragraph 4-5). If
there is fuel flow, reconnect fuel line and go to step I.
Change 1
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