73 - 31 - 00
Page - 73-06
Reissued: August 1, 1987
2I17
CHART 7301. TROUBLESHOOTING (FUEL PRESSURE GAUGE)
No fuel pressure indica- Fuel valve stuck. Check valve.
tion.
No fuel in tanks. Check fuel, fill.
Defective fuel pump. Check pump for pressure
build-up. Check diaphragm
and relief valves in engine
pump. Check for obstruc-
tion in electric pump. Check
bypass valve. Air leak in in
take lines.
Defective gauge. Replace gauge.
Pressure low or pressure Obstruction in inlet side of Trace lines and locate ob-
surges. pump. struction.
Faulty bypass valve. Replace.
Faulty diaphragm. Replace or rebuild pump.
Needle fluctuation. Surge dome on pump filled Remove and empty.
with fuel.
Air in line. Loosen line at gauge, turn
on electric pump. Purge
line of air and retighten.
High fuel pressure with en- Fuel in line expanding due Normal.
gine shut off right after to heat buildup in cowling.
flight.
—END—
TROUBLE CAUSE REMEDY
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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