TM 5-5420-226-20-1
DETAILED
TROUBLESHOOTING
PROCEDURE
Symptom-7
VEHICLE
OPERATION
- POWERPLANT,
STARTING
T
Check for free fuel flow between
engine fuel pump
and backflow
valve.
First
Technician
(Rear
of Crew
Compartment)
l Connect
primer
pump
pressure
line at backflow
valve,
l Disconnect
hose
between
backflow
valve
and
engine
fuel pump
at backflow
valve.
l Place a container
under
hose
to catch
any
fuel.
Second
Technician
(Operator’s
Station)
l Operate
primer
pump.
r
Does fuel flow freely from backflow
valve?
1
.
.
\.
—
‘L-
FUEL
HOSE
(BACKFLOW
VALVE
TO FUEL
PUMP)
Replace backflow
valve
(page 7-25).
)
TA106891
4-202
