TM 9-2350-256-20-1
0023 00
CORRECTIVE ACTION Continued
3. Disconnect fuel line connecting mechanical fuel pump assembly and fuel/water separator. Position
container to catch fuel. With MASTER and fuel pump switches in ON position, crank the engine.
If there is no fuel flow from the disconnected fuel line, replace mechanical (gear type) fuel pump
assembly (see WP 0118 00). If there is no fuel flow, reconnect fuel line and go to step 4.
CAUTION
Do not remove or disturb the center (final) filter element. If the center (final) filter element is removed,
the element must be replaced.
4.
Loosen air bleeder valve on top of fuel/water separator. With MASTER and fuel pump switches in
ON position, crank the engine. If there is no fuel flow from air bleeder valve, replace outer fuel/water
separator elements (see WP 0128 00).
5.
Disconnect fuel line connecting fuel/water separator and engine at elbow on left front engine shroud.
Position a suitable container to catch fuel from fuel line. With MASTER and fuel pump switches in ON
position, crank the engine. If no fuel flows from line, replace final filter in fuel/water separator (see
NOTE
If engine does not shutoff using fuel shutoff switch, use manual fuel shutoff handle to stop engine.
6.
With MASTER switch in ON position, have an assistant operate FUEL SHUTOFF switch several
times. Listen for a click from engine. If no click can be heard, troubleshoot fuel shutoff solenoid (see
7.
Remove left- and center-front air inlet grilles (see WP 0342 00). Have an assistant move manual fuel
shutoff handle in and out. If manual fuel shutoff linkage on front of engine does not move, replace fuel
shutoff control cable assembly (see WP 0124 00). If manual fuel shutoff linkage on front of engine
moves, do the following: Remove engine deck (see WP 0336 00). Remove forward engine cooling fan
(see WP 0144 00). While assistant moves manual fuel shutoff handle in and out, observe manual fuel
shutoff lever on side of fuel injector pump for movement. If manual fuel shutoff lever does not move,
replace manual fuel shutoff lever (see WP 0124 00).
8.
Open exhaust deflector doors and inside deck doors. Check exhaust outlets and exhaust pipes for
damage and restrictions. Remove any restrictions. Repair or replace damaged parts.
9.
Inspect air intake hoses and tubes for damage and restrictions. Remove any restrictions. Repair or
replace damaged parts.
10. Remove left- and center-front air inlet grilles (see WP 0342 00). Have an assistant move accelerator
pedal to full throttle position. Observe throttle linkage on front of engine. If throttle linkage does not
have full travel, adjust throttle linkage (see WP 0364 00).
11. Check fuel return line (see WP 0119 00) on front of engine for proper connection.
12. With MASTER switch and in-tank fuel pump switch in ON position, electric fuel pump will make a
noise. If there is no noise, troubleshoot electric fuel pump circuit (see WP 0047 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) container in a suitable position to collect fuel
from hose. Turn MASTER and in-tank fuel pump switch to ON position. Time fuel flow into container.
If there is no fuel flow or fuel flow is less than 3 gallons per minute (11 liters per minute), inspect fuel
lines for restriction. If there is no fuel line restriction, replace electric fuel pump (see WP 0116 00).
13. Remove fuel/water separator filter bleeder valve. Install a pressure gage (minimum of 100 psi [690
kPa] ) in fuel/water separator filter cover bleeder valve opening. Turn MASTER and in-tank fuel pump
switches to ON position. Start engine and operate at high idle speed (18002400 rpm). Pressure should
0023 00-2
