TM 5-5420-226-20-1
Symptom-7
T
DETAILED
TROUBLESHOOTING
PROCEDURE
VEHICLE
OPERATION
- POWERPLANT,
STARTING
(Continued)
Check for free fuel flow from primer pump
pressure line at backflow valve.
\
First
Technician
(Rear
of Crew
Compartment)
l Connect
primer
pump
pressure
line quick
disconnect.
l Remove
lower
engine
access
cover
(page
17-16).
l Disconnect
primer
pump
pressure
line at backflow
valve
(page
7-25).
l Place a container
under
line to catch
any
fuel.
Second
Technician
(Operators
Station)
l Operate
primer
pump.
Does fuel flow freely from line at backflow valve?
m
PRIMER
PUMP
PRESSURE
LINE
.
.,,
%<,
BACKFLOW+
,.
k3
VALVE
\.
( Clear clogged line between quick
disconnect
and the backflow valve
by blowing with compressed
air.
If this does not work, replace line
(page 7-40).
TA10689O
4-201