Piper Cherokee Six - Page 518

PIPER
CHEROKEE SIX
SERVICE MANUAL
9-55.
TROUBLESHOOTING.
TABLE
IX-XI. FUEL
PRESSURE GAUGE
Trouble
Cause
Remedy.
No
fuel pressure
indication.
Fuel valve stuck.
Check
valve.
No fuel
in tanks.
Defective
fuel pump.
Defective
gauge.
Check
fuel, fill.
Check
pump for
pres-
sure
build-up.
Check
diaphragm
and
relief
valves
in engine
pump.
Check
for
obstruction
in electric pump.
Check
bypass
valve.
Air leak
in intake
lines.
Replace
gauge.
Pressure
low
or
pressure
surges.
Obstruction
in inlet
side
of
pump.
Trace
lines and
locate
obstruction.
Faulty bypass valve.
Replace.
Faulty
diaphragm.
Replace
or rebuild
pump.
Needle
fluctuation.
Surge dome on pump
filled
with fuel.
Remove
and
empty.
Air in line. Loosen
line at
gauge,
turn
on electric
pump.
Purge
line of
air and
retighten.
High
fuel pressure
with engine shut off
right
after
flight.
Fuel
in line expanding
due to
heat build
up
in cowling.
Normal.
INSTRUMENTS
Issued:
8/17/72
2L2