CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTlONS
2 - 1 6 . 1 M E C H A N I C A L T R O U B L E S H O O T I N G - C o n t i n u e d
E N G I N E - C o n t i n u e d
I 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 paragraph 4-15). If there is
fuel flow, go to step L.
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 paragraph 4-15). If engine fails to start, notify
Direct Support Maintenance.
K Check fire extinguisher engine shutoff switch for
proper adjustment (see paragraph 10-6 for removing
manual interlock systems). Verify that fire
extinguisher engine shutoff activated light is lit.
L Place transmission shift lever in neutral position.
Open rear grill 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 paragraph 2-
M 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 F). If fuel flows into the container, place
MASTER switch in OFF position and connect fuel
lime. 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 paragraph 4-9). Disconnect fuel filler inlet